Nitrogen Distribution Within the Potato Plant in Relation to Planting Date Under Short Day Conditions

The distribution of nitrogen within the potato (Solatium tuberosum L.) plant in relation to planting date was studied under short-day conditions. Delayed planting decreased N accumulation and reduced leaf area resulting in yield reduction. Higher N accumulation in optimum planting was associated with larger leaf area and higher tuber yield. The total N and crude protein content of tubers declined with delay in planting. Reduced N accumulation in leaves could be partly responsible for the reduced leaf growth in delayed planting.