Levanon, D., Institute of Soils and Water, Agricultural Research Organization, Bet Dagan, Israel
Levin, I., Institute of Soils and Water, Agricultural Research Organization, Bet Dagan, Israel

The effect of nitrate concentration in the nutrient solution, on yields and nitrate accumulation in the plant, was studied in Rhodes grass grown in sand culture. The results showed that optimal yield was achieved in the 7.5meq.L-1 N solution. The optimal NO3-N concentration in the plant canopy may be an indicator of effective N fertilizer use. Increasing N fertilization will only increase the NO3-N concentration in the plant. © 1989 Kluwer Academic Publishers.