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Determinación de S cambiable del suelo por el método colorimétrico del metiltimol azul
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-04)
Traditional methods Jim determinist the exchangeable S of soils lack sensitivity, reproducibility, and are too time consuming. The method described in this paper is more favorable. Blue methylthymol in a high pH (12.70) ...
Fertilización foliar del frijol común (Phaseolus vulgaris L.): II. Efecto de la aplicación foliar del nitrógeno con y sin aplicación de nitrógeno al suelo
In two field experiments, the effects of nitrogen fertilizers applied in the soil and/or on the leaves on bean production were studied. The first experiment was conducted during the wet season and the second during the dry ...
Fertilización foliar del frijol común (Phaseolus vulgaris L.): I. El efecto del tiempo de aplicación de nitrógeno
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1982-10)
To study the effects of foliar fertilization with nitrogen in different stages of plant growth, two field experiments were set out in a sandy loam soil. The first experiment was conducted during the wet season and the ...