HORTICULTURE SCIENCE
GENERAL AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Repeated application of irrigated water in dry climates leads to ____
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a drop in productivity of the land by more than 10%, leading to desertification
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a build up of nutrients, leading to increased levels of erosion
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a build up of salts in the soil, leading to salinization
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decreased phosphorus and nitrogen, leading to eutrophication
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Explanation:
Detailed explanation-1: -Salinization of soil results from a combination of evaporation, salt precipitation and dissolution, salt transport, and ion exchange (Shimojima et al., 1996).
Detailed explanation-2: -Which type of irrigation causes soil salinization? Flood irrigation causes soil salinization at higher rates than other types of irrigation.
Detailed explanation-3: -As the water is taken up by plants through transpiration or lost to the atmosphere by evaporation, soil water salinity increases because salts become more concentrated in the remaining soil water. Thus, evapotranspiration (ET) between irrigation periods can further increase salinity.
There is 1 question to complete.