The effect of varietal type, plant population, and canopy adjustment of corn in crop yields and agronomical characters in corn and soybean intercrop [Philippines]
1983
Shereshta, S.L.
Corn variety, canopy adjustment and plant population affected grain yields of corn and soybean. The corn variety Arun produced higher grain yields (7055 and 6353 kg/ha from monoculture and intercrops, respectively) than Khumal yellow (6093 and 5132 kg/ha). Soybeans intercropped with the corn varieties yielded 869 and 722 kg/ha. When corn was intercropped, detopping at 25 days after silking did not significantly decrease corn yields but improved soybean yields by 20%. In the intercrops, high corn yields were generally associated with low soybean yields. The lower yields were attributed to shading and nutrient competition. Compared to monoculture, soybean grain yield were 54% lower in intercrops (1730 and 796 kg/ha, respectively). These lower yields were attributed to reduced numbers of pods/plant
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