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- W1729121509 abstract "For years, farmers in Southeast Arkansas have used irrigation to improve and stabilize cotton yields. Currently, approximately 85% of the cotton acreage in Desha County and surrounding areas is irrigated. Recently, growers have used collapsible thin walled Poly-pipe to furrow irrigate most of the irrigated cotton land. Vories et al. (1998) gave growers guidance on when to start irrigating, but research-supported guidelines on irrigation termination are not available. The costs associated with irrigation are substantial. But the cost of one or more late-season irrigations is generally not high, since irrigation tubing is in place from earlier irrigations. There are other, indirect costs associated with late-season irrigations, however. Late-season irrigations often delay crop maturity, increasing the risk of weather-related damage. Also, late irrigations extend the period of vulnerability to insect pests and increase the cost of controlling them. A system is needed to help growers optimize irrigation termination to obtain maximum yields while avoiding unnecessary direct and indirect costs. The COTMAN crop-management tool is becoming more popular with growers in the area. While it was initially used to monitor pre-flowering plant growth and fruiting and as a guide for late-season insecticide termination, it may provide a system for reliably determining the optimum timing for irrigation termination. The BOLLMAN component of the COTMAN system monitors late-season boll development from an easily determined marker of crop physiological development; i.e., node above white flower 5 (NAWF=5), or physiological cutout. From that point in crop development, further crop maturation is described using heat units accumulated above a 60°F base. Our objective in this study was to gather data on how many heat units should be accumulated before irrigation can safely be terminated without decreasing lint yield." @default.
- W1729121509 created "2016-06-24" @default.
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- W1729121509 date "2000-01-01" @default.
- W1729121509 modified "2023-09-23" @default.
- W1729121509 title "Cotman irrigation termination studies." @default.
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