An experiment involving three levels of N as USG (0,30 and 60 kg.ha-1) two levels P (50 and 75 kg.ha-1 P2O5) and two levels of Azolla (o and 10 t.ha-1) was conducted to study their effects on growth and yield of rice. Application of 60 kg ha-1 N recorded significantly higher grain and straw yield over 30 kg.ha-1. The grain yield of rice was not influenced by P while straw yields showed significant variation due to levels ofP. The grain yield of rice was significantly increased with 10t.ha of Azolla (3560 kg.ha-1) over no azolla (2954 kg.ha-1). The grain yield obtained with 30 kg.ha+10 t.ha-1 of Azolla (3705 kg.ha-1) was equal to yield obtained with 60 kg.ha'-1 N (3709 kg.ha¹)
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Tamil Nadu Agricultural University
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