A - Papers appearing in refereed journals
Johnston, A. E., Poulton, P. R., White, Robin P. and Macdonald, A. J. 2016. Determining the longer term decline in plant-available soil phosphorus from short-term measured values. Soil Use and Management. 32 (2), pp. 151-161.
|Authors||Johnston, A. E., Poulton, P. R., White, Robin P. and Macdonald, A. J.|
Once phosphorus (P) applications stop, it is important to know how long it will take for plant-available P in soil to decline to a particular level for soils with a history of intensive management. The rate of decline in the absence of applied P can be expressed as a half-life, that is the time in years for it to halve relative to the lowest level measured in the soil. This knowledge is essential when planning long-term policies for managing the P status of soils. It is important to farmers who wish to optimize applications of P fertilizers and make better use of accumulated P residues to ensure that plant-available P does not fall below the critical level for the soil and crop because of the risk of losing yield and the inefficient use of other inputs, especially N fertilizer. Lower levels of plant-available P are also desirable for environmental and ecological reasons. Allowing plant-available P to decline to the critical level from unnecessarily high concentrations will reduce the risk from P on eroded soil causing adverse effects of eutrophication in surface water. Low levels of plant-available P are usually considered necessary for establishing species-rich grassland. A method for determining the longer term decline in plant-available soil P from short-term measured values is presented.
|Year of Publication||2016|
|Journal||Soil Use and Management|
|Journal citation||32 (2), pp. 151-161|
|Digital Object Identifier (DOI)||doi:10.1111/sum.12253|
|Open access||Published as non-open access|
|Funder||Biotechnology and Biological Sciences Research Council|
|Funder project or code||Delivering Sustainable Systems (SS) [ISPG]|
|Statistics Department (Rothamsted)|
|Optimisation of nutrients in soil-plant systems: Determining how phosphorus availability is regulated in soils|
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