Abstract
The reproductive capacity and growth forms of Eragrostis tenella Roem et Schult are directly influenced by the intensity and duration of light, the amount of exchangeable calcium in the soil, and particularly by grazing. Although the species grows under trees, it achieves its greatest height, spread, fresh weight, and seed output in full sunlight. Growth pattern is irregular in response to calcium, but maximum seed production is achieved in soil containing about 14.14 meq% exchangeable calcium. Grazing or clipping, far from diminishing the seed supply, seems actually to increase the total seed output, since frequently clipped plants and over—grazed fields show the greatest reproductive capacity, a fact which is significant for either the control or deliberate encouragement of E. tenella.
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