Reciprocal influence of crops and shallow ground water in sandy landscapes of the Inland Pampas
2009
The analysis shows that in flat humid landscapes such as the Pampas, crops and shallow ground water are closely connected and influence each other. An optimum groundwater depth range where crop yields were highest was observed for all three crop species analyzed (wheat, maize, and soybean). The areas within these optimum bands had yields that were respectively, 3.7, 3 and 1.8 times larger than those where the water table was below 4 m. As groundwater levels become shallower crop yields declined sharply. Understanding complex interactions and simultaneous occurrences could provide keys to regulating the labile hydrology of these plains.
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