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- Response of Leucaena leucocephala to vesicular - arbuscular mycorrhizal colonization and rock phosphate fertilization in an oxisol, a journal article from 1989 PN-ABK-085
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- Survival rates of three tree species in a four-year-old alley cropping trial, a journal article from 1989 PN-ABK-211
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- Root distribution in an alley cropping system, a journal article from 1989 PN-ABK-212
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- Organic matter contained in soil aggregates from a tropical chronosequence : correction for sand and light fraction, a journal article from 1991 PN-ABK-214
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- Nitrogen release from the leaves of some tropical legumes as affected by their lignin and polyphenolic contents, a journal article from 1991 PN-ABK-215
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- Water fluxes in oxisols : a comparison of approaches, a journal article from 1992 PN-ABK-555
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- Soil surface characteristics and variability in the growth of millet in the plateau and valley region of Western Niger, an other usaid supported study/document from 1993 PN-ACA-314
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- Looking to the earth -- a foundation for global development : TropSoils, 1981-1993, an annual report from 1994 PD-ABN-441
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- Methods and guidelines for assessing sustainable use of soil and water resources in the tropics, an other usaid supported study/document from 1994 PN-ABS-982
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