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Survey of food crop production and planting intentions
(IICA, 1981)
In this report the details of a survey of food crop production and planting intentions are outliend. Particular emphasis is give to the questionaire desing, the mechanics of undertaking the survey, the sample of producers ...
Push - Pull Seeder Unit Equipament for the Small Farmer
(OEA, 1978)
Este documento presenta:
-Introducción
-Figura 1
-Descripción de la unidad sembradora antes de la modificación
-Modificación
-Figura 2
-Prueba de campo
-Ventajas