Irrigation License questions with answers graded A+ 2024/2025

Irrigation LicenseField Capacity (FC) - correct answer The amount of water retained in soil after it has been saturated and allowed to drain freely for two or three days. At field capacity, the forces holding water to soil particles are approximately equal to the downward forces of gravitational pull. What is the name of the process where water is lost through the leaves? - correct answer Transpiration How does soil affect infiltration rate? - correct answer Hard, clay-laden soil will drain poorly; Soft, sandy soil will drain quickly 4 main ways water is lost in the landscape? - correct answer Evaporation, transpiration, deep percolation, run-off How does soil affect water holding capacity? - correct answer Clay soil, has high holding capacity due to lack of pore space; Sandy soil has low holding capacity due greater pore space. How does compaction affect water holding capacity? - correct answer Increases water holding capacity and reduces infiltration rates Slopes may require precipitation rates to be - correct answer decreased One way to increase infiltration rates on slopes is to use repeated cycles - correct answer True How does soil type affect irrigation frequency? - correct answer Sandy - High drainage - more watering Clay - Low drainage - less watering 4 types of sprinklers - correct answer Spray Flood Micro-irrigation Rotary