1. Assessment of eyespot and other stem base diseases of winter wheat and winter barley
  2. The turnover of organic matter in soil
  3. Response of permanent and reseeded grassland to fertilizer nitrogen. 1. Herbage production and herbage quality
  4. The effect of weed distribution on predictions of yield loss
  5. The response of spring barley and winter wheat to Avena fatua population density
  6. Parasitism of cowpea by Striga gesnerioides: variation in virulence and discovery of a new source of host resistance
  7. Effect of seed depth on slug damage to winter wheat
  8. The competitive effects of volunteer barley (Hordeum vulgare) on the growth of oilseed rape (Brassica napus)
  9. Effects of repeated applications of fluazifop-butyl, haloxyfop and sethoxydim on Elymus repens in strawberries
  10. Uptake, translocation and phytotoxicity of imazapyr and glyphosate in Imperata cylindrica (L.) Raeuschel:- effect of herbicide concentration, position of deposit and two methods of direct contact application
  11. Predicting the growth and competitive effects of annual weeds in wheat
  12. Variations in the resistance of Stellaria media to mecoprop due to biotype, application method and 1-aminobenzotriazole
  13. The host range of isolates of downy mildew, Peronospora parasitica, from brassica crop species
  14. Dry matter yield and response to nitrogen of an Agrostis stolonifera dominant sward
  15. Short-term effects of nitrogen on the growth and nitrogen nutrition of small swards of white clover and perennial ryegrass in spring
  16. Slot-seeding investigations 7. The effects of two grass-suppressants on the growth of white clover introduced into permanent pasture
  17. Mechanism of action of herbicidal and fungicidal compounds on cell membranes
  18. Herbicide penetration across isolated and intact leaf cuticles
  19. The effectiveness of eleven sterol biosynthesis-inhibiting fungicides against the take-all fungus, Gaeumannomyces graminis var. tritici, in relation to their physical properties
  20. Uptake by tomato plants of the herbicide [C-14] 2,4-D-butyl in the vapour phase
  21. Ammonia volatilization from 5 nitrogen-compounds used as fertilizers following surface application to soils
  22. Response of bromus secalinus and bromus sterilis to preemergence and postemergence herbicide treatments
  23. Glasshouse evaluation of fungicides for control of Fusarium spp on ears of winter wheat
  24. A comparison of kriging, cubic splines and classification for predicting soil properties from sample information
  25. The pyrethroids: early discovery, recent advances and the future
  26. Philip Herries Gregory, 24 July 1907 - 9 February 1986
  27. Somaclonal variation from cultured immature embryos of sister lines of rye differing in heterochromatic content
  28. Species-specific sequences in the genus solanum - identification, characterization, and application to study somatic hybrids of solanum-brevidens and solanum-tuberosum
  29. Statistical methods in soil and land resource survey
  30. The use of coupled gas chromatography: electrophysiological techniques in the identification of insect pheromones
  31. Liebig and the Rothamsted experiments
  32. Pests, diseases and effects of crop protection on single- and double-low winter rape
  33. Agronomic aspects of straw incorporation
  34. Report on the session 2: aphid monitoring systems
  35. Suction trapping networks in Europe: future directions
  36. A review of the phenology of Eupithecia tripunctaria Herrich-Schaffer, the White-spotted Pug (Lep.:Geometridae)
  37. Nitrogen: balancing crop and environmental priorities
  38. Some recent advances in plant hormone research
  39. Opportunities for control of insects in arable crops using semiochemicals and other unconventional methods
  40. Monitoring insecticide resistance in Myzus persicae
  41. Predicting yield for the sugar industry
  42. Progress in seed quality and seed treatments
  43. Broom's Barn - a research centre for tomorrow's sugar beet crop
  44. The incidence of Polymyxa betae and other fungal root parasites of sugar-beet in Britain
  45. Measurement and prediction of isoproturon movement and persistence in three soils
  46. The influence of climatic conditions around the time of spraying isoproturon on the subsequent injury to barley
  47. The effects of tefluthrin on beneficial insects in sugar beet
  48. The development of tefluthrin as a new seed treatment for the control of soil-inhabiting pests of sugar-beet seedlings
  49. Comparison of late Sym genes in Rhizobium species and construction of improved strains
  50. Comparison of late Sym genes in Rhizobium species and construction of improved strains
  51. Assessing the risks involved in the release of genetically manipulated microorganisms
  52. Gene flow in aphids
  53. Weather, life cycle strategy and spring population of aphids
  54. Soil fertility-how can we define it in intensive agricultural systems?
  55. Rothamsted Insect Survey: Twenty-first Annual Summary
  56. OMEGA (Online multivariate exploratory graphical analysis): routine searching for structure; comment
  57. Fertilizer use on farm crops in Great Britain: results from the Survey of Fertilizer Practice, 1969-88
  58. Genstat 5, Release 2.1: Implementors guide
  59. Genstat 5, Release 2: Graphical extension guide
  60. Genstat made easy
  61. Factors limiting gene transfer in bacteria
  62. Three-dimensional biplots
  63. Queen discrimination by honeybee (Apis mellifera L) workers
  64. Relating the parameters of a leaching model to the percentages of clay and other soil components
  65. Spatial averaging of solute and water flows in soil
  66. Evaluation of an insecticidal seed treatment, Imidacloprid, for controlling aphids on sugar beet
  67. Airborne microorganisms associated with domestic waste composting
  68. The nitrate problem
  69. Paleopedology manual
  70. The effect of a plant-derived antifeedant on Tetranychus urticae$% and Phytoseiulus persimilis: a "first look"
  71. Sex attractant pheromone of damson-hop aphid %Phorodon humili$ (Homoptera, aphididae)
  72. Herbicide cross-resistance in slender foxtail (Alopecurus myosuroides)
  73. Approximating a symmetric matrix
  74. Infection of the potato cyst nematode by the nematophagous fungus, %Nematophthora gynophila$
  75. The distance of the dorsal oesophageal gland opening from the stylet base in second-stage juveniles of %Globodera pallida$ and %G. rostochiensis$ (Nematoda:Heteroderidae)
  76. A review of tolerance by potato plants of cyst nematode attack, with consideration of what factors may confer tolerance and methods of assaying and improving it in crops
  77. Field trials using single potato plants as whole plots, with and without nematicide treatment, to assess tolerance of attack by Globodera rostochiensis
  78. Estimation problems of non-linear functional relationships
  79. Multivariate analysis of within-group variability
  80. Jean Brachet, 19 March 1909-10 August 1988
  81. Comparison of the effects of prochloraz and flusilazole on foot rot diseases and on populations of the eyespot fungus,Pseudocercosporella herpotrichoides, in winter wheat
  82. Aphid semiochemicals - a review, and recent advances on the sex pheromone
  83. Aphid sex pheromone components: age-dependent release by females and species-specific male response
  84. Organic contaminants in an agricultural soil with a known history of sewage sludge amendments: polynuclear aromatic hydrocarbons
  85. Assessing the risks involved in the release of genetically manipulated microorganisms
  86. The effect of introducing the aphid-pathogenic fungus Erynia neoaphidis into populations of cereal aphids
  87. Special thematic issue
  88. Biological control of soil-borne plant pathogens
  89. Notes from Institute of Arable Crops Research/Rothamsted Experimental Station
  90. A sensitive method for detection of isolates of BWYV and BMYV based upon the polymerase chain reaction
  91. Pathogenesis-related proteins and induced resistance
  92. Cryptic viruses of beet and other plants
  93. The effects of a virus inhibitor, NS-83, derived from plants, on virus infection and multiplication in tobacco
  94. Yeasts: characteristics and identification
  95. Taxonomic history of actinomycete strains bearing the epithet rectivirgula: correct citation of authorities
  96. Fungal infection processes - a minireview
  97. Epidemiology of fungally-transmitted viruses
  98. Electrophysiological recordings and responses to various stimuli by the potato cyst nematode Globodera rostochiensis
  99. John Bennet Lawes: the record of his genius
  100. Studies on the mechanism of sodium transport at the tonoplast of Beta vulgaris. PhD thesis, University of London
  101. A histological study of the invasive and developmental processes of the aphid pathogen Erynia neoaphidis (Zygomycotina: Entomophthorales) in the pea aphid Acyrthosiphon pisum
  102. The distance of the dorsal oesophageal gland opening from the stylet base in second-stage juveniles of Globodera pallida and G. rostochiensis (nematoda: Heteroderidae)
  103. Migration for survival: fine-scale population redistribution in an aphid, Myzus persicae
  104. Possible overwintering in Britain of Autographa gamma Linn. (Lep.: Noctuidae), the Silver Y
  105. Unusual pupation site for Cerura vinula Linnaeus (Lep.: Notodontidae), the Puss Moth
  106. New Lepidoptera for Guernsey
  107. Unusual flight times of Eupithecia tripunctaria H.-S., Operophtera brumata L. and Colostygia multistrigaria L. (Lep.: Geometridae) in Rothamsted Insect Survey light traps
  108. An assessment of progress toward microbial control of plant-parasitic nematodes
  109. The physiological basis of glucosinolate accumulation in the developing seed of oilseed rape (B. napus)
  110. Effects of an isolate of Rhizoctonia solani Kuhn AG8 from diseased barley on the growth and infection of potatoes (Solanum tuberosum L.)
  111. Effect of neighbouring plants on the yield of potatoes from seed tubers affected with gangrene (Phoma foveata) or from plants affected with stem canker (Rhizoctonia solani)
  112. Effects of neighbouring plants on the yield of potatoes
  113. Improving the quality of table potatoes
  114. The use of plant and soil analyses to predict the potassium supplying capacity of the soil
  115. Mycotoxins in UK cereals and their control
  116. Evaluation of the benfit of substituting foliar urea for soil-applied nitrogen for winter wheat
  117. North European outlook of plant nutrition guidelines - experience in the UK
  118. The assessment of methods for measuring and strategies for decreasing nitrate leached from arable land
  119. Modelling the epidemiology of barley yellow dwarf virus. PhD thesis, University of Southampton
  120. A simulation study of the population, damage and control of the rose grain aphid, Metopolophium dirhodum
  121. Toxins and straw residues
  122. Agronomic aspects of straw incorporation
  123. Growing barley for malting - a review (HGCA Project 0025/1/87)
  124. Estimating basal temperatures for the development of Globodera rostochiensis and G. pallida using probability and regression or least variance analysis
  125. The potential for use of metal-accumulating plants in the decontamination of soils polluted by heavy metals
  126. Deposition of sulphur and nitrogen from the atmosphere
  127. Effects of take-all on some aspects of grain quality of winter wheat
  128. Effects of premature or delayed harvesting on the quality of barley for malting
  129. Measurement of nitrate leaching: a review of methods
  130. Managing nitrate in the environment
  131. Variation in net photosynthesis, Rubisco activity and chloroplast ultrastructure among somatic hybrids of Solanum tuberosum and S. brevidens
  132. Characteristics of chloride transport at the tonoplast
  133. Measurement of intracellular nitrate in giant algal cells using nitrate-selective microelectrodes
  134. The isolation and characterisation of protein kinase-encoding cDNA and genomic clones from rye and barley
  135. Temperature effects on source and sinks: assimilate export, carbohydrate accumulation and photosynthesis
  136. Effects of foliar applied urea on leaf composition, photosynthesis and grain quality
  137. Uncertainty in prediction of effects of environmental change on wheat yields
  138. PQQ in plants
  139. Application of species specific repetitive DNA sequences to study nuclear hybridity of somatic fusion products at the callus level
  140. The application of protoplast technology to potato improvement
  141. Stable transformation of Solanum protoplasts by direct gene transfer
  142. Plant regeneration from protoplasts of wild Solanum species
  143. Resistance in Solanum brevidens to potato virus Y and potato virus X is associated with slow cell-to-cell spread.
  144. Application of linkage group specific RFLPs to study assymetric hybrids of S. tuberosum and S. brevidens
  145. Photosynthesis and carbohydrate accumulation in relation to temperature and Pi
  146. Phosphate nutrition and photosynthesis: the role of RuBP Carboxylase and stomata
  147. Stomatal and mesophyll regulation of photosynthesis in sunflower leaves differing in phosphate status
  148. Extraction and analysis of sap from individual wheat leaf cells: the effect of sampling speed on the osmotic pressure of extracted sap
  149. Enzymes of leucine, valine and isoleucine biosynthesis
  150. Molecular analysis of barley mutants deficient in chloroplast glutamine synthetase
  151. Pyrophosphate-dependent phosphofructokinase
  152. Pyrophosphate-dependent phosphofructokinase
  153. Plastoquinol diffusion in linear photosynthetic electron transport
  154. Poster presentation: the effects of climate change on wheat yields: sensitivity of model predictions to increases in cloud cover
  155. Abscisic acid may mediate the rapid thermal acclimatization of photosynthesis in wheat
  156. Cytosolic free calcium homeostasis in plants
  157. The energetics of cytosolic calcium homeostasis in fungal cells
  158. Photosynthese. Stoffwechsel - Kontrolle - Physiologie
  159. Ribulose bisphosphate carboxylase/oxygenase and carbonic anhydrase
  160. Rapid kinetics of an N-terminal mutant of cyanobacterial ribulose-1,5-bisphosphate carboxylase/oxygenase
  161. Biochemistry of ribulose bisphosphate carboxylase
  162. Monoclonal antibodies that recognise the repeat motif of the S-poor prolamins
  163. User Guide: Rothamsted C.O.S.H.H. System
  164. How to Obtain the Status of a Farm Experiment
  165. Submitting a Proposal for a Farm Experiment
  166. A Recorders Guide to the Farm Management System
  167. Technical Guide: Sartorius Balance 1602 MP6 RS232 Interface 7053 17
  168. Information Guide: Broom's Barn Tarehouse System
  169. Ethernet Documentation: RES Ethernet Installation
  170. User Guide: Soils Analytical Section Database
  171. User Guide: Constant Environment Temperature Monitoring System
  172. User Guide: Pad Contension Switch.
  173. Technical Reference: The Rothamsted Insect Survey Database.
  174. The effects of drought and nitrogen on root growth and water uptake by winter wheat
  175. The spread of the resistant aphid
  176. Prospects for managing resistance to insecticides in the whitefly
  177. Genetic basis of sex determination in two South African strains of house-fly (Musca domestica L.)
  178. Damage to oilseed rape seedlings by the field slug Deroceras reticulatum in relation to glucosinolate concentration
  179. Monitoring and interpreting changes in insecticide resistance
  180. Laboratory evaluation and empirical modeling of resistance-countering strategies
  181. Aphid sex pheromones and interaction with host plant volatiles
  182. Compounds which mimic isothiocyanate release from glucosinolates
  183. Long-term effects on soil and crops of repeated applications of pesticides
  184. Studies on the genes responsible for insecticide resistance in the peach-potato aphid, Myzus persicae
  185. Biochemical monitoring of multiple mechanisms of resistance to organophosphorus insecticides in houseflies
  186. Biochemical study of insecticide resistance in the cottom whitefly, Bemisia tabaci (Genn.)
  187. Biochemical and DNA probing techniques for monitoring insecticide resistance genes
  188. The impact of utilization on a Cortaderia pilosa (Whitegrass) pasture in terms of production, botanical composition and tiller dynamic
  189. Avoiding edge effects in agroforestry experiments; the use of neighbour-balances designs and guard areas
  190. An efficient semi-Latin square for twelve treatments in blocks of size two
  191. Strategies for control of eyespot (Pseudocercosporella herpotrichoides) in UK winter wheat and winter barley
  192. Butterflies and moths - migration in the agricultural environment
  193. Plant parasitic nematodes associated with the roots of wind toppled trees at the Royal Botanic Gardens, Kew
  194. Temporal genetic stability within and restricted migration (gene flow) between local populations of the blackberry-grain aphid Sitobion fragariae in south-east England
  195. Interesting Lepidoptera records for April 1990
  196. Conservation and manipulation of aphid parasitoids
  197. Pollination requirements of linseed (Linum usitatissimum)
  198. A simulation study of aphid damage and control strategies in cereals
  199. Economic consequences of pesticide use for grain aphid control on winter wheat in 1984 in England
  200. A long-term comparison of ploughing, tine cultivation and direct drilling on the growth and yield of winter cereals and oilseed rape on clayey and silty soils
  201. Viruses in honey bee colonies infested with Varroa jacobsoni: first findings in Yugoslavia
  202. Varroa jacobsoni as a virus vector (CEC Report EUR 11932)
  203. Storage root quality in sugarbeet in relation to nitrogen uptake
  204. Artificial infestation of soil with Gaeumannomyces graminis var. tritici to study the relationship between take-all and wheat yields in field experiments
  205. Field trials with cyst nematodes and laboratory studies with Pratylenchus spp. on oilseed rape.
  206. Recent work on honey bee diseases at Rothamsted. I. Pathogen incidence studies
  207. Recent work on honey bee diseases at Rothamsted. II: Kashmir bee virus
  208. Entomophthorales in pest control
  209. Genstat 5. Release 2. Reference Manual Supplement
  210. A comparison of the effects of single or multiple spring applications of prilled urea or 'Nitro-chalk' to winter oilseed rape (Brassica napus)
  211. The epidemiology and prospects for control of barley yellow dwarf virus in autumn
  212. Seasonality and diversity of macrolepidoptera in two lowland sites in the Dumoga-Bone National Park, Sulawesi Utara
  213. Effects of the nematode Pratylenchus fallax on roots of oilseed rape (Brassica napus var. oleifera
  214. Changes in the populations of Pseudocercosporella herpotrichoides in successive crops of winter wheat in relation to initial populations and fungicide treatments
  215. In vitro studies of siderophore production by wild type and rifampicin resistant strains of fluorescent Pseudomonads
  216. Factors affecting the colonisation of a root system by fluorescent Pseudomonads: the effects of water, temperature and soil microflora
  217. Light Trap Newsletter
  218. Selection of species-specific monoclonal antibodies for use in the detection of root-knot nematodes
  219. Pasteuria penetrans a parasite of root-knot and cyst nematodes: the potential for its use in biological control.
  220. Studies on resistance breaking populations morphologically indistinguishable from Meloidogyne incognita
  221. The characterisation of Pasteuria penetrans using a polyclonal antibody and its effect on spore attachment to the second-stage juvenile of Meloidogynae incognita
  222. Influence of temperature and nematode species on the efficacy of the fungus Verticillium chlamydosporium, as a biological control agent of root-knot nematodes
  223. A method for rapid fixation and dehydration of nematode tissue for transmission electron microscopy
  224. The role of the moulted cuticles in the survival of Rotylenchulus reniformis
  225. Feeding and the accumulation of Ditylenchus dipsaci
  226. Moulting of Apelenchoides hamatus
  227. Electrophysiological recordings and responses to stimulants from Globodera rostochiensis and Syngamus trachea.
  228. Sources of nitrate leaching from arable soil to aquifers
  229. Some agricultural and environmental consequences of long-term applications of inorganic nitrogen fertilizer
  230. The leaching of nitrates after spring fertilizer application and the influence of tillage
  231. Losses of nitrate from arable land by leaching and their effect on nitrates in drainage and groundwater
  232. Causes of variation in yields of wheat under dryland farming in the Alentejo Region of Portugal and some future prospects
  233. Symptomless infection of Rhynchosporium secalis on leaves of winter barley
  234. Comparison of infection by W-type and R-type isolates of the eyespot pathogen, Pseudocercosporella herpotrichoides, in relation to host species and cultivar, temperature and watering regime in controlled environments.
  235. The development of eyespot on seedling leaf sheaths in winter wheat and winter barley crops inoculated with W-type and R-type isolates of Pseudocercosporella herpotrichoides
  236. Estimating levels of gene flow between natural populations of cereal aphids (Homoptera: Aphididae)
  237. Laboratory apparatus and techniques for the rearing and insecticidal treatment of whitefly Bemisia tabaci (Homoptera: Aleyrodidae) under simulated field conditions
  238. Chimaeras of the Rubisco large subunit from wheat and Anacystis do not assemble into active enzyme in E. coli
  239. Effects of fungicide timing on the severity of eyespot on winter wheat or winter barley inoculated with W-type or R-type isolates of Pseudocercosporella herpotrichoides
  240. Electrophoretic 'keys' for the identification of parasitoids (Hymenoptera: Braconidae: Aphelinidae) attacking Sitobion avenae (F.) (Hemiptera: Aphididae)
  241. The turnover of organic carbon and nitrogen in the soil
  242. Sedimentology and micropalaeontology of glacimarine sediments from the Central and Southwestern Celtic Sea
  243. Modelling potassium uptake by wheat (Triticum aestivum) crops
  244. Effect of pollination on flower, pod and seed production in white lupin (Lupinus albus)
  245. A rapid method using Ricinus communis for the estimation of phloem translocation of xenobiotics
  246. The effect of tyre/soil contact pressure and zero traffic on soil and crop responses when growing winter wheat
  247. Surface heterogeneity in Osorno soil
  248. Potassium exchange in soils and clays
  249. A remark on algorithm AS 65: interpreting structure formulae
  250. Translation nets and fixed-point-free group automorphisms.
  251. Modelling K uptake by plants from soil.
  252. Genstat made easy.
  253. Some comments on Gerechte designs. I. Analysis for uncorrelated errors.
  254. A comparison of algorithms for combination of information in generally balanced designs.
  255. Genstat 5 Release 1 for personal computers.
  256. The Genstat menu system.
  257. New facilities in Genstat 5 Release 2.
  258. Straw incorporation - its effects on soil fertility.
  259. Development and control of Botrytis in UK sunflower crops.
  260. Responses to pathogen and pest control in linseed.
  261. Biochemical and molecular genetic analysis of insect populations resistant to insecticide.
  262. Variation in resistance frequencies of Myzus persicae on sugar beet - implications for control.
  263. Seasonal variation of susceptible and resistant variants of Myzus persicae.
  264. The cotton-whitefly field control simulator: laboratory apparatus for evaluating insecticides and resistance management strategies under simulated field conditions.
  265. Biochemical assays for insecticide resistance: strategies and limitations.
  266. New methods in diagnosis as aids to crop protection.
  267. Experiments in England and France on fertilisers, fungicides and agronomic practices to decrease take-all.
  268. Effect of planting date and irrigation on soil temperature, soil water content, and maize root growth
  269. Survival of the soil microbial biomass at elevated temperatures.
  270. Ninhydrin-reactive nitrogen measurements of microbial biomass in 0.5M K2SO4 soil extracts.
  271. Leaks in the nitrogen cycle.
  272. Measurement of soil microbial biomass C by fumigation-extraction - an automated procedure.
  273. Modelling the effects of polyphagous predators on the population dynamics of the grain aphid Sitobion avenae (F.). PhD thesis, University of Southampton
  274. Detection of DNA-binding proteins in nuclear extracts of barley endosperm.
  275. Role of honeydew in the location of cereal aphids by their parasitoids.
  276. Expression of wheat gluten protein in yeast. PhD thesis, University of Kent
  277. Purification, characterisation and biosynthesis of the vacuolar acid invertase of storage roots of red beet (Beta vulgaris L.).
  278. The rhizobium-legume symbiosis.
  279. Kriging: a method of interpolation for geographical information systems.
  280. Monitoring Dasineura brassicae by means of pheromone traps.
  281. A bibliography of the parasitoids of the brassica pod midge (Dasineura brassicae Winn).
  282. Honeybee responses to chemical components from the worker sting apparatus and mandibular glands in field tests.
  283. The effect of different periods of brood isolation on subsequent brood-cell visits by worker honeybees (Apis mellifera L).
  284. Herbage yield and botanical composition over twenty years of a predominantly ryegrass sward treated frequently with phorate pesticide and three rates of nitrogen fertiliser.
  285. Barley yellow mosaic virus (BaYMV) and BaYMV-M: two different viruses.
  286. Experimental allergic alveolitis after inhalation of mouldy air.
  287. Evaluation of methods for enumerating microorganisms in filter samples from highly contaminated environments.
  288. The relation between reflected radiation and yield on the Broadbalk winter wheat experiment.
  289. Hymexazol treatment of sugar-beet seed to control seedling disease caused by Pythium spp. and Aphanaomyces cochlioides .
  290. Manganese deficiency and the adjuvant connection.
  291. Rhizomania - recent research and its implications.
  292. Weed beet monitoring 1978-1988.
  293. Nematodes - the hidden enemy.
  294. Remote sensing to predict the yield of sugar beet in England.
  295. Deaminase activity in arable soils.
  296. New active ingredients for controlling aphids and virus yellows in sugar beet.
  297. Nuclear factors interact with conserved A/T-rich elements upstream of a nodule-enhanced glutamine synthetase gene from French bean.
  298. Vector aphid dynamics and BYD epidemiology.
  299. Recent records of Eupithecia abietaria Goeze (Lep.: Geometridae), the Cloaked Pug, from Rothamsted Insect Survey light traps.
  300. Observations on some species of Longidorus (Nematoda: Longidoridae) from Jiangsu Province, China, with a description of Longidorus jiangsuensis n.sp.
  301. The influence of certain herbicides in pelletted form on the hatch and invasion of Globodera rostochiensis, G. pallida and Heterodera schachtii .
  302. Interesting Lepidoptera records for April 1990.
  303. Parascotia fuliginaria L. (Lep.: Noctuidae), Waved Black, in Shropshire.
  304. Second brood records of Lacanobia thalassina Hufn. (Lep.: Noctuidae), the Pate-shouldered Brocade, from Rothamsted Insect Survey light traps.
  305. A somatic mosaic of Cosmia trapezina Linnaeus (Lep.: Noctuidae), the Dun Bar.
  306. Some relationships between microbial ATP and soil microbial biomass, measured by the fumigation-extraction procedure and soil organic matter.
  307. Development and control of black dot (Colletotrichum coccodes ).
  308. Conformational studies of peptides corresponding to the coeliac-activating regions of wheat alpha-gliadin.
  309. Physicochemical aspects of phloem translocation of herbicides.
  310. The life-cycle, population dynamics and host specificity of a parasite of Heterodera avenae , similar to Pasteuria penetrans.
  311. The effect of temperature on photosynthesis and carbon fluxes in sunflower and rape.
  312. Sampling remotely sensed imagery for storage, retrieval and reconstruction.
  313. Selection of exploitable biological control agents for plant-parasitic nematodes.
  314. Rothamsted farmland light trap network ; interesting Lepidoptera records for May 1990.
  315. Soil microbial biomass measurements in sieved and unsieved soil.
  316. Effects of defoliation at different growth stages and in different grain-filling environments on the growth and yield of spring barley.
  317. Nitrate accumulation by wheat (Triticum aestivum ) in relation to growth and tissue concentrations.
  318. Convenient synthesis of mosquito oviposition pheromone and a highly fluorinated analog retaining biological activity.
  319. Solute transport in the vadose zone: a review of models.
  320. Low input agriculture - is it sustainable?
  321. Genstat 5. Release 2.1.
  322. Incomplete variance functions.
  323. Seasonal changes of soil microbial biomass in an arable and a grassland soil which have been under uniform management for many years.
  324. Mycorrhizal infection of clover is delayed in soils contaminated with heavy metals from past sewage sludge applications.
  325. Recent advances in the use of isotopes in organic matter studies.
  326. 130 years of inorganic nitrogen fertilizer applications to the Broadbalk Wheat Experiment: the effect on soil organic nitrogen.
  327. The ATP content and adenylate charge of the soil microbial biomass and the effects of temperature on microbial survival and the mineralization of soil organic matter.
  328. Resistance of Myzus persicae to insecticides applied to sugar beet
  329. The use of ELISA for detecting viruses in sugar beet and aphids.
  330. Seed quality research for improved establishment.
  331. Forecasting powdery mildew.
  332. Bolting and weed beet prospects for 1990.
  333. Timing the application of P, K, Na and Mg fertilisers.
  334. Irrigation of sugar beet: the benefits in 1989.
  335. The effects of yellowing viruses on yield of sugar beet in field trials, 1985 and 1987.
  336. Soluble carbohydrates in roots of leek (Allium porrum ) plants in relation to phosphorus supply and VA mycorrhizas.
  337. Soluble carbohydrates in roots of leek (Allium porrum) plants in relation to phosphorus supply and VA mycorrhizas
  338. Do vesicular-arbuscular mycorrhizal fungi have a role in plant husbandry?
  339. Tropical residual soils. Geological Society Engineering Group Working Party Report
  340. Geology and relief
  341. La biomasa microbiana como agente de las transformaciones de nitrogeno en el suelo tras el enterrado de la paja del cereal. [The microbial biomass as the agent of transformation of soil nitrogen after the incorporation of cereal straw.] PhD thesis, University of Madrid, Spain
  342. An evaluation of methods for measuring the microbial biomass in soils following recent additions of wheat straw and the characterisation of the biomass that develops.
  343. Symptomless infection of Rhynchosporium secalis on leaves of winter barley.
  344. The polynuclear aromatic hydrocarbon (PAH) content of archived sewage sludges.
  345. Control of slugs with contact-action molluscicides.
  346. An isolate of Melissococcus pluton from Apis laboriosa.
  347. An introduction to the global nitrogen cycle.
  348. Leaf protein : production and use
  349. Chemical ecology and pest management: some recent insights.
  350. Characterization of Cl- transport in vauolar membrane vesicles using a Cl- sensitive fluorescent probe: reaction kinetic models for voltage and concentration-dependence of Cl- flux.
  351. Plant form, tiller dynamics and above-ground standing crops of the range of Cortaderia pilosa communities in the Falkland Islands.
  352. General balance and treatment permutations
  353. Are there too many beet in our fields?
  354. Weather focus - an assessment of the last three months.
  355. Weather focus - an assessment of the last three months.
  356. The continuing story of virus yellows.
  357. The use of a specific gravity table or an aspirator in sugar-beet seed processing. II. To increase vigour and synchrony of germination.
  358. The use of a specific gravity table or an aspirator in sugar-beet seed processing. I. To increase the germination percentage.
  359. Some changes in sugar-beet seeds during maturation and after density grading.
  360. Factors associated with germination of sugar-beet seed in the standard test and establishment in the field.
  361. Resistance to potato virus Y and potato virus X in Solanum brevidens.
  362. Studies on the genetic basis of resistance to potato leaf roll virus, potato virus Y and potato virus X in Solanum brevidens using somatic hybrids of Solanum brevidens and Solanum tuberosum.
  363. Electroporation of cells.
  364. Selection of transformed cells.
  365. The presence of a thaumatin-like protein, a chitinase and a glucanase among the pathogenesis-related proteins of potato (Solanum tuberosum)
  366. Estimating the surface density of fissures in clay soil from deterministic parallel sections.
  367. Prevalence of Sitobion fragariae (Walker) over S. avenae (Fabricius)(Hemiptera: Aphididae) on wild cocksfoot grass (Dactylis glomerata ) in south-east England.
  368. Differential cold hardiness in adults and nymphs of the peach-potato aphid Myzus persicae .
  369. The rapid and sensitive detection of the plant parasitic nematode Globodera pallida using a non-radioactive biotinylated DNA probe.
  370. The use of DNA to identify plant parasitic nematodes.
  371. Purification, characterization, and some properties of a virus from the aphid Sitobion avenae.
  372. Effect of oleic acid on vegetative growth of the aphid-pathogenic fungus Erynia neoaphidis.
  373. Extraction and processing of plant and soil nematodes.
  374. Pseudomonas syzygii , sp. nov., the cause of Sumatra disease of cloves.
  375. Grain dust and health.
  376. Automorphism groups of block structures with and without treatments.
  377. Chromium and nickel.
  378. Nitrogen deposition to land from the atmosphere.
  379. An overview of the nitrogen cycle.
  380. The dynamics of nitrogen accumulation in barley grain and malting quality.
  381. Conformational studies of synthetic peptides corresponding to the repetitive regions of the high molecular weight (HMW) glutenin subunits of wheat.
  382. The management of populations of vesicular-arbuscular mycorrhizal fungi in acid-infertile soils of a savanna ecosystem. II. The effects of pre-crops on the spore populations of native and introduced VAM-fungi.
  383. The management of populations of vesicular-arbuscular mycorrhizal fungi in acid-infertile soils of a savanna ecosystem. I. The effect of pre-cropping and inoculation with VAM-fungi on plant growth and nutrition in the field.
  384. Mycorrhizal associations and their significance.
  385. Mapping seed storage protein loci Sec-1 and Sec-2 in relation to five chromosomal rearrangements in rye (Secale cereale L.)
  386. Decomposition of carbon-14 labeled ryegrass and maize under tropical conditions.
  387. Chronological methods applied to the investigation of paleosols.
  388. Recent progress in the investigation of paleosols and paleoweatherings.
  389. Predation of the cereal aphid Sitobion avenae by polyphagous predators on the ground.
  390. Estimating potential crop colonization by barley yellow dwarf vectors from suction trap samples.
  391. The production and release of ascospores of Pyrenopeziza brassicae on oilseed rape.
  392. The prolamin storage proteins of cereal seeds: structure and evolution.
  393. The stimulation of CAM activity in Mesembryanthemum crystallinum in nitrate and phosphate-deficient conditions.
  394. Laboratory and field assessment of a new aluminium chelate slug poison.
  395. Electrophysiological recordings and responses to various stimuli by the potato cyst nematode, Globodera rostochiensis .
  396. Base sequence divergence in mitochondrial DNA from European populations of Globodera rostochiensis and G. pallida .
  397. A review of the phenology of Eupithecia tripunctaria Herrich-Schaffer, the white-spotted pug (Lep.: Geometridae).
  398. Flavonoids in human food and animal feedstuffs : amounts and consequences.
  399. Nematode pests : the need for biological control.
  400. Electrophoresis as a tool for estimating levels of hymenopterous parasitism in field populations of the cereal aphid, Sitobion avenae .
  401. Aphids - the flying menace of agriculture.
  402. Host plant selection by migrant Rhopalosiphum padi in autumn and the occurrence of an intermediate morph.
  403. Barley yellow dwarf virus (BaYMV) and BaYMV-M: two different viruses.
  404. The soil microbial biomass : its measurement, properties and role in soil nitrogen and carbon dynamics following substrate incorporation.
  405. Biochemical and molecular biological approaches to insecticide resistance research.
  406. Monoclonal antibody-based enzyme linked immunosorbent assay of aflatoxin Bsubscrip1, T-2 toxin, and ochratoxin A in barley.
  407. Temperature and seed storage longevity.
  408. The epidemiology of barley yellow dwarf in Europe.
  409. Delayed emergence in Chloroclystis v-ata Haworth (V-pug) (Lep.: Geometridae).
  410. The effects of prolonged drought and nitrogen fertiliser on root and shoot growth and water uptake by winter wheat.
  411. Root diseases.
  412. Computerized database management for a cereal aphid-monitoring scheme.
  413. An editor's farewell.
  414. Direct methods for estimating denitrification losses of nitrogen fertiliser.
  415. Summary chapter: losses of nutrients from ecosystems.
  416. Quantifying inputs of non-fertiliser nitrogen into an agro-ecosystem.
  417. Investigation of ribulose 1,5-bisphosphate carboxylase/oxygenase by genetic manipulation. PhD thesis, University of Warwick
  418. The pyrethrins and related compounds. Part XXXVII. Synthesis and insecticidal properties of new 1-aryl-1-(3-arylpropyl and -propenyl)cyclopropanes (non-ester pyrethroids).
  419. Some aspects of root growth in compacted soils.
  420. Effects of the nematode Pratylenchus fallax on roots of oilseed rape (Brassica napus var. oleifera ).
  421. Effects of break crops on wheat.
  422. Statistical software reviews: Statistical Navigator
  423. A remark on algorithm AS 65: interpreting structure formulae.
  424. White clover pests
  425. White clover enhancement in permanent grassland using pesticides
  426. The use of cold-flow ammonia and bag silos in the production of maize silage for beef production. Results of a trial commissioned by the Maize Growers' Association, conducted at Buildings Farm, Marcham, winter 1989-90
  427. The significance of gaseous losses of nitrogen from livestock slurries applied to land
  428. The role of atmospheric cycling in controlling selenium levels in grassland and livestock
  429. The prediction of voluntary feed intake of cattle
  430. The performance of ewes offered diets containing different proportions of perennial ryegrass and white clover silage in late pregnancy
  431. The effect of nitrogen on species diversity and agricultural production on the Somerset Moors
  432. Sward composition, animal performance and the potential production of grass/white clover swards continuously stocked with sheep
  433. Studies on reducing the odour and ammonia emissions during and after the land spreading of animal slurries
  434. Soil structure deterioration and impared root development in grassland as a result of long-term pesticide use
  435. Ryegrass endophyte and its effects on white clover germination
  436. Resistance to ryegrass mosaic virus and herbage yield of the synthetic cultivar Bb 2113, compared with other Italian ryegrass cultivars
  437. Representation of microbial metabolism in a mathematical model of rumen fermentation
  438. Reducing the odour during slurry disposal
  439. Reducing gaseous losses of nitrogen from cattle slurry applied to grassland by the use of additives
  440. Quantifying motivation using a computer-controlled push-door
  441. Prediction of the voluntary intake of grass silages by beef cattle. 2. Principal component and ridge regression analyses
  442. PlotOp - A system for the analysis of operant behaviour
  443. On correcting for the non-ideal behaviour of the fluid-phase marker when determining digesta flow by continuous marker infusion
  444. Odour and ammonia emissions following the spreading of anaerobically-digested pig slurry on grassland
  445. Modelling metabolism of growth in cattle
  446. Modelling in vitro and in vivo rumen processes
  447. Mesophilic anaerobic digestion of dairy cow slurry on a farm scale: maintenance requirements and reliability
  448. Measuring the motivation of domestic fowl in response to a positive and a negative reinforcer
  449. Intakes of silages, hays or straws by ewes in mid pregnancy
  450. Herbage yield of nine genotypes of perennial ryegrass with and without infection by ryegrass endophyte
  451. Factors affecting yields of milk constituents in dairy cows
  452. Environmental persistence of pesticides used in grassland: implications for predatory ground beetles
  453. Efficient grassland utilization by conservation and grazing
  454. Effect of Acremonium lolii on herbage yield of Lolium perenne at three sites in the UK
  455. Does ryegrass endophyte stimulate emergence of white clover seedlings?
  456. Determination of rumen volume in nonsteady state using digesta markers: a dynamic, deterministic, mechanistic approach
  457. Consultancy report prepared for Stratton Creber land agents
  458. Connecting the sow diet to reproductive performance: A mathematical model of sow metabolism
  459. Beef production from grass - white clover swards in the United Kingdom
  460. Atmospheric inputs of heavy metals and organic contaminants to agroecosystems
  461. Ammonia volatilization from cattle slurry following surface application to grassland. II. Influence of application rate, wind speed and applying slurry in narrow bands
  462. Additivity in intake models
  463. Abstracts of Communications. Proceedings of the Twentieth Meeting of the AFRC Modellers' Group