Woburn Erosion Reference Experiment crop yields.

The experiment was situated on a sandy soil at Woburn Experimental Farm (Great Hill II/III) on a slope of about five degrees (7-13%), which had been subject to periodic erosion since at least 1950. The eight plots were approximately 24 x 36m (0.086 ha), separated by grassed earth banks 1m wide and 30cm high which prevented runoff and eroded soil leaving the plots. The eroded soil and runoff were collected in tanks at the end of each plot after each erosion event. Four plots were cultivated and drilled parallel to the contour, and four up and down the slope. Four plots received standard cultivations and four minimal tillage. Crops included potatoes, winter wheat, sugar beet and winter barley.