Effect of nitrogen and population density on growth and yield of glutinous corn under monoculture and intercropped with peanuts [Philippines]
1985
Tranje, H.E. | Pava, H.M. (Central Mindanao Univ., Musuan, Bukidnon (Philippines))
Nitrogen application and population density influenced the growth and yield performance of glutinous corn. It was found out that regardless of weight, grade and classification, the highest yield was obtained at the highest population density. A marked difference was exhibited by plants fertilized with 90 kilograms nitrogen per hectare compared to the other treatment means. It was also observed that application of nitrogen beyond 90 kilograms per hectare tend to produce more cobs which were susceptible to damage caused by corn borer and silkworms. The combined land equivalent ratio (LER) of both corn and peanut intercrop was highest at 50,000 plants per hectare and 45 kilograms nitrogen per hectare. The lowest LER was obtained at the lowest population density with or without nitrogen application. Cost and return analysis showed that corn at reduced population density and with peanut intercrop gave the highest net return per hectare. The corn plants maintained at a lower population density (44,444 plants per hectare) and fertilized with 90 kilograms nitrogen per hectare gave a net return of P12,149.79 which showed a difference of P935.79 per hectare compared to sole corn (53,333) which obtained a net return per hectare of P11,213.40
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