AGET $220$

Soil Loss Homework

$1.$ Determine the soil loss for a field in Memphis, TN if $\backslash (\backslash$mathrm$\{$K$\}=0\mathrm{.}15\backslash ),$ slope length is $200$ feet and slope steepness $\backslash (=10\backslash )$ percent, and $\backslash (\backslash$mathrm$\{$C$\}=0\mathrm{.}26\backslash ).$ Assume the field is tilled up and down the slopes.

$2.$ If the allowable soil loss tolerance is $5$ tons$/$acre$,$ the soil is clay loam with $\backslash (2\backslash \%\backslash )$ organic matter located in northern Alabama, $\backslash (\backslash$mathrm$\{$LS$\}=2\mathrm{.}0\backslash ),$ and $\backslash (\backslash$mathrm$\{$P$\}=0\mathrm{.}6\backslash ),$ compute the maximum value for the cover$-$management factor.

$3.$ If the soil loss for a $\backslash (8\backslash \%\backslash )$ slope and a $400$ feet length of slope is $4$ tons$/$acre$,$ what would be the expected soil loss would be expected given the same conditions except slope of $200$ feet length?

$4.$ Determine the soil loss for a field in Martin, TN if the slope length is $200$ feet with a slope steepness of $\backslash (4\backslash \%\backslash ).$ The cover management factor is $0\mathrm{.}42$ and the field is used for rowcropping and the residue is left in the field after each harvest. The soil is a silty clay and the farming is done across the contours.

$5.$ Which factors in the Universal Soil Loss Equation $($USLE$)$ are under the control of the person using the land? Explain why each one you list can be changed or adapted.