irrigation 2 Flashcards
what is moisture deficit
difference between accumulated ET and the effective rainfall
what does irrigation do
replace the moisture deficit
maximizing water use and efficiency
maximizing crop growth and yield
what will ET determine
irrigation system peak flow rate and annual crop water requirement
what does a irrigation management plan do
ensures the irrigation system is operated to match the crop, soil, climate conditions at a site
what are the irrigation farm benefits
eliminate wasteful water use
minimize energy use for pumping
minimize leaching of nutrients and fertilizer/herbicides/pesticides
what are the irrigation environmental benefits
retain water for other watershed uses
reduce runoff (flow and cotamination)
what can over irrigation do
drowns roots, stress plants
leaches nutrients
reduces nutrient uptake
cools soil
more root diseases
reduces crop quality
increases system costs
take water away from your source
what can under irrigation do
reduces crop yield
reduces crop quality
reduces plant growth
weakens plant
over irrigation can lead to large amounts of nitrogen being lost from soil
denitrification can occur in water logged soil.
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