for soil fertility management when grown at high popula- tion density to increase canopy light interception, and hence, productivity. The higher nutrient uptake in tall cassava was the reason for its lower nutrient use effi- ciency. In most cassava regions, farmers don’t recycle the crop residue to the soil after harvest, thus a signifi- cant amount of nutrients are removed. It was reported in Kerala state, southern India, that under sufficient rainfall (>1500 mm in 10 months), the short duration improved cultivar, namely Sree Vijaya (6 months duration and high HI, released in 1998), had greater yield and greater NUE in terms of storage root production per unit of nitrogen uptake than the traditional cultivar, namely M-4 (10 month duration and low HI) [61]. It appears that for soil conservation and better use of nutrient in cassava crop- ping systems, the choice of cultivar is an important ap- proach. Therefore, breeding for short-to-medium stature genotypes is warranted.