A golf course manager complained that when she irrigated the fairways the water would not infiltrate very readily. Soil samples were collected and the soil solution (saturated extract) contained: 1600 ppm Ca+2, 960 ppm Mg+2, and 2760 ppm Na+(express per liter to calculate). The CEC is 35 meq/100g soil and the lab recommended lowering the ESP to 5% to improve infiltration. Note an acre furrow slice (lbs/a-ft) weighs 2,000,000lbs.
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A golf course manager complained that when she irrigated the fairways the water would not infiltrate...