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)
The range of variation for ten characters indicated wide differences among thirty genotypes of Ricebean. The phenotypic and genotypic coefficients of variation were high for number of clusters/plant, grain yield/plant, number of pods/plant and 100 seed weight. These characters also exhibited high heritability and high genetic advance as per cent of mean indicating that the characters are under the control of additive genes. The grain yield showed positive and significant correlation with plant height, number of branches/plant, number of clusters/plant, numbers of pods/plant, pod length and 100 seed weight. Path analysis indicated that numbers of pods/plant, 100 grain weight, number of seeds/pod, pod length, plant height and number of branches/plant could be considered as reliable variables for further crop improvement in ricebean.
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