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- Overman, A. R.; Sanderson, M. A.; Jones, R. M.
- Agronomy journal 1993 v.85 no.3 pp. 541-545
- interspecific variation; cultivars; mathematical models; forage crops; Panicum coloratum; application rate; soil water content; Cynodon dactylon; arid zones; dry matter accumulation; crop yield; rain; growth models; Eragrostis curvula; Cenchrus ciliaris; nitrogen fertilizers; Texas
- ... Models provide a quantitative means to evaluate yield response of forage grasses to applied N and water availability. The objective of this analysis was to estimate model parameters (A, b, c) for bermu. dagrasses and bunchgrasses grown at the same location and during the same time period. The logistic equation was used to relate annual dry matter production to applied N for three bermudagrasses [C ...
- Kimball, B. A.; Mauney, J. R.
- Agronomy journal 1993 v.85 no.3 pp. 706
- Gossypium hirsutum; dry environmental conditions; nitrogen fertilizers; crop yield; harvest index; lint cotton; seeds; dry matter accumulation; water stress; irrigated conditions; source-sink relationships; photosynthesis; carbon dioxide; root shoot ratio; Arizona
- ... The CO concentration of the atmosphere is increasing and is expected to double sometime near the middle of the next century. To determine the effects of such a CO increase on cotton (L.) growth and productivity, a series of experiments from 1983 through 1987 were conducted with open-top CO-enriched field chambers at ample as well as limiting levels of water and N at Phoenix, AZ. Comparisons with o ...