Foliar Nutrition of Different Sources of Phosphorus on Yield and Economics of Greengram (Vigna radiata.L.) in North Eastern Zone of Tamil Nadu

Nutrient management is an important cultural operation in increasing the productivity of pulses. It is closely related to availability of nutrients and also mobilization absorption, and utilization of nutrient from the soil. Foliar nutrition to pulse crops is very essential at flowering stage to arrest the flower dropping and also to induce the flowering. Accordingly, the field experiment was conducted in greengram variety VRM (Gg) - 1 at Agricultural College and Research Institute, Vazhavachanur during summer season, 2019 with different sources of phosphorus as foliar spray in greengram. The study revealed that the application of Mono Ammonium Phosphate (MAP) as foliar spray @ 1.0 per cent at flower initiation stage ( First spray) and 15 days after first spray (second spray) has recorded the highest seed yield of 1161 kg ha-1 and mean haulm yield of 1929.12 kg ha-1 in addition to the gross monetary returns of Rs. 57,541 ha-1, net monetary returns of Rs. 36,989 ha-1 with B: C ratio of 2.79 when compared to other sources of phosphorus at different concentrations in green gram cultivation.