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- Prediction of long-term fertilizer nitrogen requirements of maize in the tropics using a nitrogen balance model, a journal article from 1992 PN-ABL-709
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- Potassium in two humid tropical ultisols under a corn and soybean cropping system : II. dynamics, a journal article from 1992 PN-ABL-710
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- Division S-4-soil fertility & plant nutrition : nitrate dynamics during the aerobic soil phase in lowland rice-based cropping systems, a journal article from 1993 PN-ABQ-805
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- Soil phosphorus fraction dynamics during 18 years of cultivation on Typic Paleudult, a journal article from 1994 PN-ABX-289
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- Integrated nutrient management for sustained crop production in Sub-Saharan Africa : (a review), an other usaid supported study/document from 1998 PN-ACD-879
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- Hedgerows and their effects on crop productivity and soil loss induced by water and tillage erosion on small runoff plots in the El Pital watershed, Nicaragua, an other usaid supported study/document from 2002 PN-ADA-463
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- A soil carbon accounting and management system for emissions trading : special publication, an other usaid supported study/document from 2002 PN-ADA-472
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- Soil management collaborative research support program : project year 6 annual progress report, 2002-2003, an annual report from 2003 PD-ACF-639
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- Soil management collaborative research support program : project year 7 annual progress report, 2003-2004, an annual report from 2004 PD-ACF-640
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