B - Book chapters etc edited externally
Johnston, A. E., Poulton, P. R., Fixen, P. E. and Curtin, D. 2014. Phosphorus: its efficient use in agriculture. in: Sparks, D. L. (ed.) Advances in Agronomy Vol.123 Elsevier.
|Authors||Johnston, A. E., Poulton, P. R., Fixen, P. E. and Curtin, D.|
|Editors||Sparks, D. L.|
Changes in understanding the behavior of soil and fertilizer phosphorus (P) during the last 150 years are presented and recent concepts have been linked with agronomic data to produce a model that considers four pools of inorganic soil P related to their plant availability and extractability by chemical extractants. The stronger the bonding of phosphate ions to soil components, the lower the plant availability. P-use efficiency in agriculture is related to soils reaching and being maintained at a critical level of readily plant-available P, and factors affecting the critical level are discussed. Efficiency can be assessed by the direct, difference, and balance methods. The latter, calculated as the P output/input ratio, shows that P-use efficiency can exceed 80–90%. Combined data from controlled experiments in England and derived “statewide” aggregate information in the United States relating output/input ratios to changes in plant-available P could best be described by a single, simple function, making a powerful and convincing statement suggesting that there is an underlying “simple rule” for the behavior of plant-available inorganic soil P that is related to the four-pool concept discussed.
|Year of Publication||2014|
|Book title||Advances in Agronomy Vol.123|
|Series||Advances in Agronomy|
|Digital Object Identifier (DOI)||doi:10.1016/B978-0-12-420225-2.00005-4|
|Funder project or code||Delivering Sustainable Systems (SS) [ISPG]|
|Open access||Published as non-open access|
|Online||17 Dec 2013|
|Copyright license||Publisher copyright|
|Journal citation||123, pp. 177-228|
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