The major purpose of testing soils for phosphorus (P) is to determine the quantity of supplemental P required to prevent economic loss of crop value because of P deficiency. A second purpose for testing soils for P is to monitor the quantity of available P present over time. This chapter aims to review the facets of testing soils for P including interpretation of the test results. In the process, an attempt is made to indicate what existing soil test methodology can and cannot do. A greenhouse experiment on millet demonstrated that P uptake increased as soil moisture increased at a soil temperature of 27 °C, but not at 16 °C. The quantity of labile P in a soil is just one of several factors that determine the plant availability of soil P. The chapter discusses factors more specific to soil test P calibration and interpretation.
|Title of host publication||Soil Testing and Plant Analysis|
|Number of pages||40|
|State||Published - Sep 11 2018|
Bibliographical notePublisher Copyright:
© 1990 by the Soil Science Society of America, Inc.
- Greenhouse experiment
- Plant availability
- Soil phosphorus
- Soil test correlation
- Soil test phosphorus calibration
- Soil test phosphorus interpretation
ASJC Scopus subject areas
- Engineering (all)
- Agricultural and Biological Sciences (all)