Salinization and Salt Buildup in Irrigated Farmland
Learn about the hazards of salt buildup in irrigated farmland, impacting crop production and costing billions in lost food crops in the United States. Explore the issue of salinization, especially prevalent in regions like the Central Valley, and its impact on agriculture.
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Presentation Transcript
Salinization Lab Salt buildup is an existing or potential hazard on almost all of the 42 million acres of irrigated farmland in the United States. Much of the world s unused land is in arid and semiarid regions where irrigation will be necessary. Excessive salinity is presently costing the U.S. billions of dollars in lost food crops. This is becoming a huge problem in our own Central Valley, running from Bakersfield, CA to Fresno, CA.
Ground Water Water Model Demonstration Salt water intrusion to field crops along the central valley. http://www.envisionenviroed.net/images/e3000_aquifer_a.jpg
Calculate the % [NaCl] in 300 ml H2O Germination Rate V2 V1/V1 x 100 100 ml H2O 300 ml H2O Conductivity Germination # % NaCl % NaCl S/g 1 10 seeds 0 0.5 1 1.5 2 2.5 3 3.5 4
Salinization Irrigated water contains salt. The ground where the crops are planted increases in salt concentration. Evaporation
