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Fig. 4. Soluble reactive phosphorus (SRP) in runoff vs. soil test P (STP) levels using (a) Mehlich-III, (b) Olsen, (c) NaOH, and (d) Bray extractants.





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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Soil Science Society of America Journal Journal of Plant Registrations The Plant Genome