Contouring/Cross Slope Farming (continued)
ØFunction of:
-Ridge height
-Row grade
-Cover-management
-Hydrologic soil group
-Storm severity (10 yr EI)
ØVaries with time
-Tillage that form ridges
-Decay of ridges
Over factors such as cover-management, hydrologic soil group, and storm severity affect performance of contouring by affecting runoff.
The effectiveness of contouring is almost entirely dependent on how it affects runoff.
The effectiveness of contouring varies through time as ridges are formed by tillage and as ridges settle and are eroded after tillage.