Abstract:
Studies on the influence of fertilizer nitrogen and blue-green algae on
growth and yield of rice variety Pusa 2-21 under different soil moisture regimes
revealed that submergence was essential to obtain maximum grain yield under Delhi
conditions. The crop responded well upto 90 kg N/ha. Inoculation of blue-green
algae was effective in increasing the grain yield of rice comparable to that obtained
with 30 kg N/ha. The full benefit of algal inoculation could be derived only under
continuous submergence in a comparatively dry year. Effect of algal inoculation
was pronounced under lower levels of nitrogen.