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Relacao quantidae/intensidade (Q/I) de potassio em alguns solos das zonas cacaueiras do Brasil e de Costa Rica
(IICA, Turrialba (Costa Rica), 1972)
The quantity-intensity (Q/I) relationship was determined in soils of humid tropic regions. Factors such as liming, shading of cocoa trees, potassium applications, and successive croppings as affecting the Q/I parameters ...