See more from this Session: C03 Graduate Student Poster Competition
Monday, November 1, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
Doublecropping soybean after wheat is the predominant small grain crop rotation in the Mid-Atlantic. Increased barley demand provides the opportunity for newer and more diverse cropping systems. Very little information is available comparing a barley-soybean to either wheat-soybean or full-season soybean systems. Field studies were conducted at four sites in Virginia during 2008 through 2010 to determine yield and profit of four cropping systems that include: fallow full-season soybean, rye cover crop- full-season soybean, barley-soybean, and wheat-soybean. In 2009, wheat and barley yields ranged from 1,680 to 4,435 kg ha-1 and 3,978 to 6,235 kg ha-1, respectively. At two of four locations, yields for both full-season soybean and soybean following barley were greater than soybean following wheat. Full-season soybean averaged 3,622 kg ha-1 and 3,816 kg ha-1, and barley-soybean averaged 3,615 kg ha-1 and 4,038 kg ha-1, respectively. At these two sites, yields of full-season soybean and soybean following barley were 410 kg ha-1 and 604 kg ha-1, and 94 kg ha-1 and 517 kg ha-1 greater than soybean following wheat, respectively. A breakeven sensitivity table was created using yields and prices. The net returns from the barley-soybean cropping system were competitive with both the wheat-soybean and the full-season soybean cropping systems.