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- Progress report no. 7 : soil salinity control for the growth of plants which can serve as energy source, a periodical from 1987 PD-AAX-190
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- Effects of soil pH and Eh on growth and nutrient uptake by rice in a flooded oxisol of Sitiung area of Sumatra, Indonesia, a periodical from 1987 PN-AAZ-804
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- Soil salinity control for the growth of plants which can serve as an energy source [: final report], an other usaid supported study/document from 1987 PN-AAZ-854
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- Final report on grant # DPE-5542-G-SS-4016-00 : phosphorus deficiency in tropical dry bean production -- an approach through foliar fertilization, an other usaid supported study/document from 1987 PN-ABA-919
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- Progress report no. 3 : Ri-plasmid induced root culture as a potential substrate for in-vitro propagation of mycorrhizal fungi - 3. VA mycorrhizal fungi and host plant infection specificity, a periodical from 1987 XN-AAZ-814-A
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- Progress report no. 4 : Ri-plasmid induced root culture as a potential substrate for in-vitro propagation of mycorrhizal fungi-4. the development of the root VA mycorrhizal fungus culture system, a periodical from 1987 XN-AAZ-814-B
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- Interim progress report no. 3, Nov. 1, 1986-June 1, 1987, project AID-SCI 936-5442 : development of appropriate technologies for overcoming different mechanisms of phosphorus retention in Central American soils, a periodical from 1987 XN-AAZ-817-B
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- Final report : transfer of hydrogen uptake (Hup) genes from Rhizobium leguminosarum to fast-growing, salt tolerant Rhizobium fredii, an other usaid supported study/document from 1988 PN-ABS-440
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- Final report on the role of VA mycorrhizae in the phosphorus nutrition of economic leguminous crops in Thailand, an other usaid supported study/document from 1989 PN-ABF-541
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- Final report, project AID-SCI 9365442 [936-5542] : development of appropriate technology for overcoming different mechanisms of P retention in Central American soils, an other usaid supported study/document from 1991 PN-ABH-725
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