Improving rice quality through crop and resource management
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Conference Proceeding
Summary of greenhouse plant nutrient survey studies of Chinese soils
Jin, J.Y, Portch, S
Published in International Symposium on the Role of Sulphur, Magnesium and Micronutrients in Balanced Plant Nutrition / sponsors, the Potash and Phosphate Institute of Canada ... [et al.] [Sam Portch, editor] (1991)
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Published in International Symposium on the Role of Sulphur, Magnesium and Micronutrients in Balanced Plant Nutrition / sponsors, the Potash and Phosphate Institute of Canada ... [et al.] [Sam Portch, editor] (1991)
Publication
Fertilizer recommendations for farmers
Portch, S. (Potash and Phosphate Inst., Hong Kong (China))
Published in Agro-Chemicals News in Brief (ESCAP/FAO/UNIDO) (01.04.1994)
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Published in Agro-Chemicals News in Brief (ESCAP/FAO/UNIDO) (01.04.1994)
Journal Article
The importance of evaluating and improving soil fertility in the agriculture of Ecuador
Bejarano, W. (Instituto Nacional de Investigaciones Agropecuarias, Quito (Ecuador)), Portch, S
Published in Publicacion Miscelanea - Instituto Nacional de Investigaciones Agropecuarias (Ecuador) (01.10.1974)
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Published in Publicacion Miscelanea - Instituto Nacional de Investigaciones Agropecuarias (Ecuador) (01.10.1974)
Publication