Alluvial soil with a depth of (1.3mm) weighs (2.9) and its dry weight (2.5N). Knowing that the field capacity of the soil (35 kg), its wilting point (10 kg), bulk density As (14). Find 1- Total available water (mm) 2- The actual depth of water to be added as irrigation water depth (mm).

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The moisture content of a soil is to be increased up to the field capacity of 28% from 21% through irrigation of the field. Determine the depth of water to be irrigated (in mm) if the effective root zone is at a depth of 70 cm. Take density of soil as 1.3 g/cm3 and that of water as 1.0 g/cm3.

5. Field capacity Field capacity may be defined by pressure threshold (= -340 cm) or by a threshold in specific discharge (q=0.1 mm/day). Use the Brooks and Corey equations (Tables 7.2 and 7.4 in Dingman) to estimate the field capacity (8) of the following media according to both definitions. Assume soils are mineral (0% organic carbon content). Complete your calculations for one example media on engineering paper using standard engineering format as given in the Problem Solving template. Enter all answers into the table below. Media Sand Silt loam Loam Clay Clay content (%) 5 15 20 65 8 when =-340 cm 8 when = 0.1 mm/day q=