JEQ Journal of Natural Resources and Life Sciences Education
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Fig. 6. Probability of soil total P concentration exceeding threshold values of 500, 750, 1000, 1250, and 1500 mg kg-1 in 1998 (current study) vs. 1990 (DeBusk et al., 1994).





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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