A Farmer Started Irrigating a Soil Some 10 Years Ago

question 14

Multiple Choice

A farmer started irrigating a soil some 10 years ago but in recent years yields have declined and the soil physical condition has deteriorated.Which of the following most likely accounts for this situation?

• A)high content of Ca and Mg in the irrigation water
• B)failure to use conservation tillage to reduce salt accumulation at the soil surface
• C)high SAR of the irrigation water
• D)excessive drainage of the soil
• E)high gypsum content in the soil

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