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What is the value of the topographic factor (LS)? (choose one) A) 0.4 B) 0.18 C) 5% D) 300

What is the value of the topographic factor (LS)? (choose one) A) 0.4 B) 0.18 C) 5% D) 300

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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What is the value of the topographic factor (LS)? (choose one)

A) 0.4
B) 0.18
C) 5%
D) 300
1000 600 800 400 SLOPE LENGTH (FEET) 200 0.5% 1X 2% XE 4% 100 5% 6X X8 10% rev 14% 16% 20% 25% ΧΟΣ | 40% SLOPE 50% 60 80 40 20 FIGURE 4.-Slope-effect chart (topographic factor, LS). LS(/72.6) (65.41 sin'0 +4.56 sin +0.065) where slope length in feet; gradients 1 percent, 0.3 for 1 to 3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes, and 0.5 for slopes of 5 percent or steeper. 0.1 0.2 0.4 0.6 0.8 1.0 2.0 4.0 6.0 8.0 10.0 20.0 TOPOGRAPHIC FACTOR - LS PREDICTING RAINFALL EROSION LOSSES-A GUIDE TO CONSERVATION PLANNING angle of slope; and m= 0.2 for 13
Transcribed Image Text:1000 600 800 400 SLOPE LENGTH (FEET) 200 0.5% 1X 2% XE 4% 100 5% 6X X8 10% rev 14% 16% 20% 25% ΧΟΣ | 40% SLOPE 50% 60 80 40 20 FIGURE 4.-Slope-effect chart (topographic factor, LS). LS(/72.6) (65.41 sin'0 +4.56 sin +0.065) where slope length in feet; gradients 1 percent, 0.3 for 1 to 3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes, and 0.5 for slopes of 5 percent or steeper. 0.1 0.2 0.4 0.6 0.8 1.0 2.0 4.0 6.0 8.0 10.0 20.0 TOPOGRAPHIC FACTOR - LS PREDICTING RAINFALL EROSION LOSSES-A GUIDE TO CONSERVATION PLANNING angle of slope; and m= 0.2 for 13
We are soybean farmers who practice chisel tillage with little residue and have recently implemented terracing. A soil sample from our field had the following properties: Property Rainfall erosivity factor Soil erodibility factor % Silt % Sand % OM Slope length Percent slope Value 5200 0.04 50 50 3 300 3 Use this information to answer the following five questions. Units -1 MJ mm ha ¹ h¹ yr-1 ton ha h ha-¹ MJ-¹ mm ¹ % % % ft %
Transcribed Image Text:We are soybean farmers who practice chisel tillage with little residue and have recently implemented terracing. A soil sample from our field had the following properties: Property Rainfall erosivity factor Soil erodibility factor % Silt % Sand % OM Slope length Percent slope Value 5200 0.04 50 50 3 300 3 Use this information to answer the following five questions. Units -1 MJ mm ha ¹ h¹ yr-1 ton ha h ha-¹ MJ-¹ mm ¹ % % % ft %
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