. What factors affect soil moisture stress? b. Aside from methods previously discussed, can you suggest other methods or techniques which can be used to identify moisture stress? C. Why is crop yield reduced when soil is too wet or too dry? d. Assuming that field capacity is 28%, determine the irrigation water depth required, when soil moisture is found to be 10% before irrigation. Assume root zone depth = 0.50 meter. e. If consumptive use rate is 4 mm/day and effective rainfall is on the average 1.5 mm/day, what is the interval of irrigation? f. Describe the probable root system of a crop which has been applied with frequent, light and widely spaced heavy irrigation. g. What factors affect the scheduling of irrigation water? h. If soil moisture is to be restored to field capacity, how much water should be applied if moisture tension reaches the permanent wilting point? i. Assume that readily available moisture amounts to 150 mm/neter depth of soil profile. If consumptive use rate is 5mm/day what is the irrigation interval for a crop with 30 cm root zone.
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