A field experiment was conducted to study the effect of top dressing of nitrogen during flowering and maturity stages on pod and seed yield of greengram. Results indicated that over and above the recommended dose of 25 and 50 kg ha~(-1) of N and P asbasal application, top dressing of 10 kg N ha~(-1) once at stray flowering and once at pod development stage should be applied for increased yield. Pulse crops play an important role in Indian Agriculture. Besides being rich in protein, they sustain theproductivity of the cropping systems. In India the area under pulse crops at present is around 23 million ha, with a production of 15 million tones and a productivity of about 650 kg ha~(-1). The country would need at least 23 million tones of pulses by2005 AD and 30 million tones by 2020 AD (Asthana, 2000). There is not much scope for increasing the area under pulses and hence the productivity has to be doubled in the next two decades at the national level.
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机译：进行了田间试验，以研究开花期和成熟期氮追肥对绿豆荚和种子产量的影响。结果表明，除推荐的25和50 kg ha〜（-1）的基础施氮和磷施用量外，在杂花期一次和在豆荚发育阶段应追肥10 kg N ha〜（-1）。用于提高产量。豆类作物在印度农业中起着重要作用。除了富含蛋白质外，它们还可以维持种植系统的生产力。在印度，目前豆类作物的面积约为2300万公顷，产量为1500万吨，生产力约为650千克公顷（-1）。到2005年，该国至少需要2300万吨的脉冲，到2020年，至少需要3000万吨（Asthana，2000年）。增加脉冲下面积的空间不大，因此在未来的二十年中必须在国家一级将生产率提高一倍。
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