Agrohydrological aspects of tomato and bean crops in Oran (Salta), Argentina.

Abstract

The objective of this paper is to evaluate first tomato and dry bean cultivation management for exportation in Orán, through the hydrologic daily balance in relation with complementary irrigation necessities. With the pluviometric data of the location of Orán, three hydrologic daily balances were made, simulating different soil managements: natural pasture, green manure - cultivation of tomato, and green manure - cultivation of bean. Subsequently, the obtained series of water storage in the soil was analyzed, and the probability of absolute drought, conditional drought, and optimum humidity was calculated for every decade of the year. Then, for the critical periods and for the entire cycle of each crop, the possibility of application of complementary irrigation was studied. The consecutive mean water storage simulation values showed a greater frequency of drought periods at the beginning of the century than in the last decades, which presented an increment in precipitation data.