Author: P. MUTHUKRISHNAN, S, MAHENDRAN and R. KALIAPPA,
p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 72, Issue: nov-nov,
Agricultural College and Research Institute. Madurai during 1980 and 1981 to study the effect of biofertilizers alone and in combination with urea in rice, revealed that application of either Blue green algae or Azolla coupled with 75 kg N/ha gave equal yield as that at 100 kg N/ha, indicating a saving of nitrogen to a tune of 25 kg/ha.
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