7. Examples of Intercropping REGION INTERCROP North and North Central US wheat /grasses/ clover Northwestern region, west of the Cascade Range oats/red clover. Southern Oregon wheat/subterranean clover Willamette Valley in Oregon corn /sorghum for silage South Dakota corn, soybean, and spring wheat (alternating strips) Iowa strip-crops oats, corn, and soybean. Nebraska corn/wheat/soybean Parma, ID (Brown Bradford) relay cropping barley and corn Canada corn /soybeans for silage; barley, oats , or triticale are intercropped with clover