Trends in fertilizer use [on sorghum, pearl millet, chick peas, and groundnut] in western regions of India [Gujarat, Maharashtra, Madhya Pradesh [Paper presented]]

agroclimatology agua del suelo arachis hypogaea cajanus cajan cicer arietinum clima climat climate eau du sol engrais evapotranspiration fertilizers gujarat lluvia madhya pradesh mineral soils modele modelos models pennisetum typhoides pluie rain rendement rendimiento soil water sorghum bicolor suelo mineral vertisol vertisoles vertisols yields