The agronomic significance of mixed cropping
1977
Haizel, K.A. | Twumasi-Afriyie, S. (Cape Coast Univ., Cape Coast (Ghana). School of Agriculture)
The publication discusses the growth, development and yield of maize cultivar Composite 2, and sorghum cultivar Dwarf Hegari grown in pure stands and in mixtures. Individual plot size was 6.3 m x 3.6 m. Spacing between adjacent rows of plants was 90 cm at standard density, and 180 cm half density. Total dry matter production and grain yield from four successive destructive harvests indicate that mixtures were less productive than the higher yielding crop (Zea mays) in pure stand but more productive than the lower yielding crop (Sorghum) in pure stand. The comp1641etitive ability, assessed additively using an ('index density' and by the Relative Growing Coefficient of the Replacement series) indicated that a higher plant density than 37,000 plants/ha is required before a more intense competition can be induced. The nature of competition depicts mutual exclusiveness, with the yields of the two cultivars compensating each other with the Zea mays gaining on Sorghum in later gr
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