$($A$)$ Estimate the average annual soil loss for $300$ m field, moldboard plowed under corn$-$soybean rotation in mid Missouri. The soil is silt loam $(21\%$ coarse and medium sand, $3\%$ very fine sand, $19\%$ clay, and $57\%$ silt$)$ with $2\mathrm{.}5\%$ of soil organic matter content and slope of $3\mathrm{.}8\%.$ The structure is fine granular, and the saturated hydraulic conductivity is $55$ mm h$1.$ Make necessary assumptions, if any. $($B$)$ For problem $($A$),$ if the field is contoured, estimate the average annual soil loss. Relevant equations, figure, and tables are given in Appendix.