Watson,M. and Mullen,R.(2007): Understanding soil tests for plant-available phosphorus. The Ohio State University, School of Environment and Natural Resources, 4p.

『植物が利用可能なリンに対する土壌試験を理解する』

Introduction
Development of a soil phosphorus test
　Correlation
Recommended soil phosphorus tests
　Bray-Kurtz P1 test
　Mehlich-3 test
　Olsen test
Comparison between the Bray-Kurtz P1 and Mehlich-3 tests
References

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