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Now showing items 11-13 of 13
The effect various methods of land preparation on soil resistence to penetration and yield of corn (Zea mays L.), cassava (Manihot esculenta Crantz) ans sweet potato (Ipomoea batatas L.) in association. II. Effect on yield
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1985-10)
Aluminio activo en suelos derivados de cenizas volcánicas de Costa Rica y Guatemala
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1984-07)
Active aluminum extracted with 0.2 M ammonium oxalate, pH 30, and 4 M KOH of 51 samples of Andepts of Costa Rica and Guatemala was quantified and compared. Acid-oxalate extractable alumimum varied from 0.02 to 5.45 while ...
Relaciones fósforo-zinc en tres suelos ácidos de Costa Rica, 1: comportamiento en el suelo.
(Instituto Interamericano de Cooperación para la Agricultura (IICA), 1983-07)
The effects of high P and Zn applications and their interactions were studied in three acid (pH 5 .3-5.9 ) soils of Costa Rica. It was observed that as all three soils fixed P strongly, the obtained available P levels, ...