Results also revealed that, with except for increasing the irradiation dose from 10 to 20 Gy in season 2010, all increments in radiation doses, N and PK fertilizer levels, were correlated with significant increases in number of branches/ plant. In this regard, Salve and Gunjal (2011) reported that the application of 50 and 75 kg P2O5, as well as 30 and 45 kg K2O/ ha to groundnut were at par with each other but significantly increased plant height and spread compared to the application of 25 kg P2O5, and 30 and 45 kg K2O/ ha, respectively. That are also in agreement with results of[] Gobarah et al. (2006) who reported an increase in vegetative growth when P levels was increased from 30 to 60 Kg P/ fad. Similarly, number of pods/ plant recorded significant increases as a result of increasing irradiation dose and N fertilizer level. In this regard, it is worth mentioning that a variety named JL24 recorded a 37 % increase in the number of pods/ plant in response to a 100 Gy dose (Lukanda,et al., 2013). On the other hand, it was found that doubling K application levels with the application of 31 kg P/ fad., resulted i[]n insignificant increases in the number of pods/ plant in both seasons under investigation. In this regard, Shiyam (2010) reported that, different phosphorus levels insignificantly affected plant height and number of branches/ plant while it significantly affected the number of filled pods/ plants, with 40 kg P2O5/ ha recording the best result.
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