Productivity, quality, and nutrient uptake of intensive forage crop rotations based on corn in sandy soil (northern Morocco)

<span>Intensive dairy farming systems in the sandy soil of northwestern Morocco are based on three successive forage crops per year, including corn. The aim was to evaluate productivity and quality different intensive crop successions corn soil. Three year (winter, spring, summer cropping seasons) were tested according six successions: 1. fallow-corn-corn, 2. oat-corn-corn, 3. berseem-corn-corn, 4. pea/triticale-corn-corn, 5. oat-soybean-corn, 6. berseem-corn-soybean. Each succession evaluated two years field experiment using a randomized complete block design. Results revealed that oat-corn-corn pea/triticale-corn-corn produced highest dry biomass (46.5 t ha<sup>-1</sup> year<sup>-1</sup>). berseem-corn-soybean resulted lowest (30.8 ha<sup>-1 </sup>year<sup>-1</sup>). net energy for lactation recorded at (303 10<sup>3</sup> MJ one (oat-soybean-corn berseem-corn-soybean) (195.5 oat-soybean-corn crude protein values (3.9 Soil organic matter content total N, P, Mg similar end experimental years.</span>