There is a need to develop management systems allowing agricultural
production to meet the multiple demands of food, feed,
fiber and fuels. Increasing demand for biomass enlarge the need
for water, land and nutrient resources even further creating environmental
concerns (Sagar and Kartha, 2007). Several productive
soils already show a steady decline in soil organic carbon (SOC)
pools (IPCC, 2007), with negative impact on soil fertility (Sommer
and de Pauw, 2011). Cropping systems which are more complex are