2010%20BRAE%20236%20HW14

# 2010%20BRAE%20236%20HW14 - A) 0.5 in B) 1.0 in C) 1.5 in D)...

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BRAE 236 HW14 MAD and SMD Questions a. Clay loam soil, saturation = 4.8 in/ft, AW = 1.6 in/ft, PWP = 2.0 in/ft, air dry = 1.5 in/ft. What is FC (in/ft)? A) 3.6 in/ft B) 2.1 in/ft C) 1.6 in/ft D) 0.5 in/ft b. Same soil as in problem a). What is the moisture content of the soil (%) if SMD = 0.5 in/ft? A) 28.3 % B) 25.8 % C) 20.1 % D) 15.4 % c. Clay loam soil, Saturation = 40%, FC = 28%, PWP = 16%, Air Dry = 13%. What is the SMD if the soil moisture content is 23% ? A) 2.8 in/ft B) 1.4 in/ft c) 0.9 in/ft D) 0.6 in/ft d. Tomatoes with a 4 foot root zone are grown on a sandy loam soil. AWHC = 1.25 in/ft. ETc = 0.25 in/day, and the irrigation manager uses MAD = 60%. What is the total Available Water Holding Capacity for the root zone? A) 1.5 inches B) 2.0 inches C) 3.0 inches D) 5.0 inches Water Penetration Questions e. How much rain (inches) will it take to penetrate 3 feet into the soil if the SMD is 0.5 in/ft?
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Unformatted text preview: A) 0.5 in B) 1.0 in C) 1.5 in D) 2.0 in f. SMD totals 7.0 inches for a 36-inch root zone. How deep into the soil will 4.0 inches of water penetrate? A) 36 inches B) 7.0 inches C) 20.5 inches D) 4.0 inches Available Water Questions Problems g-i: Given: The following representative soil log for a field. Soil Texture Depth, in. Zone Thickness, ft AW, in/ft Clay Loam 0-18” 1.5 2 Loam 18-36” 1.5 1.65 Sandy Loam 36-60” 2 1.25 g. Find the total PAW of the soil root zone for a crop with an effective rooting depth of 30 inches. A) 1.75 in B) 2.69 in C) 3.33 in D) 4.65 in h. Find the total AW of the soil root zone for a crop with an effective rooting depth of 48 inches. A) 1.75 in B) 2.69 in C) 3.33 in D) 6.73 in i. If RZ = 48 inches and MAD = 40%, what is the SMD just before irrigation? A) 1.75 in B) 2.69 in C) 3.33 in D) 4.65 in...
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## This note was uploaded on 11/07/2010 for the course BRAE 236 taught by Professor Styles during the Fall '08 term at Cal Poly.

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