Irrigation Engineering
The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5. If the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is

14 cm
10 cm
8 cm
12 cm

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Irrigation Engineering
As per Lacey’s theory, the silt factor is

directly proportional to average par¬ticle size
not related to average particle size
inversely proportional to average par¬ticle size
directly proportional to square root of average particle size

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