Agricultural Drainage Reuse in Agroforestry Systemsby Kenneth K. Tanji, Univ of California, Davis, United States,
Fawzi Karajeh, Univ of California, Davis, United States,
Abstract: On the westside of California's San Joaquin Valley, agroforestry systems are being evaluated as a solution to the agricultural drainage problem. Eucalyptus tree plantations are established to consume the excess shallow saline ground water and cropland drainage waters. The long-term efficacy of this practice is being evaluated. This paper presents a growing body of data on soil water and salt fluxes in a tile-drained 9.43 ha Eucalyptus plantation. After several years of drainwater reuse, a substantial buildup of salinity and boron has occurred throughout the soil profile to the extent that the trees are no longer able to extract the available soil water.
Subject Headings: Agriculture | Drainage systems | Salt water | Soil water | Water resources | Soil pollution | Water pollution | North America | California | United States
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