Simultaneous young cob and green corn production through high density planting and nitrogen fertilization using urea and sesbania
1990
Andam, C.J.
Results showed that maximum yield and profit of young cob and marketable green ear were obtained when "Super Sweet" corn was planted at 120,000 plants/ha and fertilized with 180 kg N/ha. The young cobs were harvested from plants in the furrows leaving 50% of the initial population density of 120,000 plants/ha for green ear production. Higher population densities favored fodder yield. Comparison of three sesbania species/varieties for green manure showed that Sesbania rostrata had the highest biomass yield and number of nodules per plant. However, the availability of seeds and the length of time before it can be incorporated in the soil can become a problem in its adoption. Herbage from older trees of the S. grandiflora particularly the white variety had shown to be a good alternative since it gives higher nitrogen content. Sesbania herbage can be a substitute for urea up to 50% without reduction in yield and quality of young cob, green ear, and fodder. The profitability of the system was not affected at this substitution level. In fact, even with an increase or decrease by 12% in the prices of inputs or products or both, the system remained economically feasible. The fodder yield can be added advantage in terms of raising ruminant animals as an adjunct to the system.
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