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- W791874174 abstract "A single field experiment was conducted in 1990 on a growercooperatorfield to evaluate the response of a full season maturity type of Upland Cotton (DPL 90) to three dates of irrgationtermination. The crop was planted 26 and 27 of March, managed uniformly in all respects until August 1 when earliest irrigation termination wsa imposedThe dates for the second and final irrigationtermination treatments were 15August and 15 September. Each irrigationtermination treatments were given an additional 8 acre inches of water (approximate). Harvest results revealed no significant differences in lint yield on the first two dates but the last date yielded 110 pounds more. All plots received a 2 inch rain 18 August. Introduction Interest in this study was generated from the need to evaluate the yield differences among several dates of irrigation termination. In an effort to save dollars from less water costs and insecticide applications the consideration of irrigation termination is important for reaching optimum returns with regard to minimizing late season imputs. Records show consistently that high infestation and crop damage from pink bollworm occurs in late August, and early September. A weak point in the life cycle of the pink bollworm can be taken advantage of through exercising complete crop termination prior to diapause of the pink bollworm larvae in the fall. Therefore, an evaluation of optimal points for applying the last irrigation is important in terms of efficient crop management and insect pest control for insects such as pink bollworm and whitefly. Materials And Methods Deltapine 90 cotton was planted on March 26 and 27 on V & K Wakimoto Farms in Mohave Valley, Arizona. The experimental area was managed in a uniform manner until irrigation termination treatments were imposed (Table 1). Plots consisted of blocks of 12.82acres, 6.8acres, and 14.25acres on 40 inch rows. Plots were picked two times, and individually weighed and ginned. Results Yield results for the experiment are shown in Table 2, show no significant differences in yield between treatments l and 2, but we find a difference of approximately 110 pounds between treatment 3 and treatments 1 and 2. As the plant mapping results indicate (Table 3), substantial fruit loss was encountered between the 12 July and 15 August sample dates. This pattern wsa characteristic of many Arizona cotton producing ares in Arizona in 1990, due largely to high humidity and high night temperatures. The loss of fruit over this period of crop development provided for a greater potential for late season compensation in the form of a top crop" @default.
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- W791874174 date "1991-01-01" @default.
- W791874174 modified "2023-09-25" @default.
- W791874174 title "Effects of 3 Irrigation Termination Dates on a Full Season Type of Upland Cotton in Mohave Valley, Arizona" @default.
- W791874174 hasPublicationYear "1991" @default.
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