Download Agricultural Salinity Assessment and Management by Edited by Wesley W. Wallender, Kenneth K. Tanji, Sc.D. PDF

By Edited by Wesley W. Wallender, Kenneth K. Tanji, Sc.D.

Agricultural Salinity evaluation and administration, moment variation, considers around the globe salinity and hint aspect administration in irrigated agriculture and water offers. This up to date version offers a connection with aid maintain irrigated agriculture and integrates modern options and administration practices. It covers technical and medical features of agricultural salinity mangement, in addition to environmental, monetary, and felony matters. issues comprise: nature and volume of agricultural salinity; analysis of salinity difficulties and choice of keep watch over practices; soil reaction to saline and sodic stipulations; plant responses to saline and sodic stipulations; long term regional-scale modeling of soil salinity; case research of San Joaquin Valley, California; institutional and salinity concerns at the higher Rio Grande; and viability of irrigated agriculture with increasing area and time. the second one variation of MOP seventy one is effective to water pros, engineers, scientists, practitioners, and educators drawn to constructing and dealing with ever extra restricted water offers all over the world

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Extra resources for Agricultural Salinity Assessment and Management

Example text

Numerous references to canal building in Sumeria from the third millennium BC are available, but no record of drainage canals being built to sustain agriculture (a common present-day occurrence) exists. Similar problems have developed in more recent times in the Indus Plain region, which includes parts of modern-day India and Pakistan, where irrigation began about 2,000 years ago by the Harappa civilization. Serious salinity and drainage problems did not develop until recently, within the last 150 years or so (Taylor 1965).

The precipitation of minerals and the dissolution of minerals are essentially engaged in a tug-of-war that depends on the relative rates of evapoconcentration versus dilution. Hypersaline waters typically would have solute abundances in the order of Na Ն Mg Ͼ Ca and Cl Ն SO4 Ͼ HCO 3. Fresh waters would typically have nearly the reverse order of Ca Ն Mg Ͼ Na and HCO3 Ͼ Cl Ն SO4. Soil-Water Systems Figures 1-4, 1-5, and 1-6 indicate that mineral solubility principally controls water chemistry and salinity in systems, such as streams and lakes.

NATURE AND EXTENT OF AGRICULTURAL SALINITY AND SODICITY 17 TABLE 1-3. Summary of Drainage Management Alternatives for the San Joaquin Valley Westside That Is Constrained by Irrigation Drainage Disposal Options Practices Feasibility/ Adverse Impacts Estd. Annual Costs, US$ haϪ1 Source reduction (SR) Reduce the volume of subsurface drainage by shortening furrow lengths; installing sprinkler, drip, and linear-move systems; modifying irrigation schedules; encouraging use of shallow groundwater to meet crop ET; implementing tiered water pricing, etc.

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