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Fluid Journal : Fluid Journal 1993-1995
3 Fluid Journal Spring 1995 applications have consistently hastened maturity, even in the absence of yield response. This was not observed in the 1994 study. In 1994, soil test Zn was higher than in 1993 and soil temperatures were gener-ally warmer throughout the season than in previous years. Availability of soil Zn may have been adequate to supply plant needs late in the season. Also, Zn appli-cation rate in previous work was 5 lbs/A versus 1 lb/A in 1994. Procedure Plot. The study was conducted in a randomized complete block design with a split-strip-plot arrangement of treatments. Plots were 11 feet wide and 35 feet long. Fertilization. Treatments and fertilizer materials used are shown in Table 1. For liquid treatments, water was added to the fertilizer materials listed in Table I in order to bring the volume applied to 30 gal/A for better application accuracy. Banded fertilizers were knifed-in two inches from the plant row and two inches below the seed immediately before planting. Soil. Soil was a Garland clay loam (fine, mixed, mesic Typic Haplargid). The soil was prepared by fall plowing and roller harrowing in 1993, and roller harrowing and leveling in March 1994. Previous crop was malting barley. Soil samples. Soil samples were taken April 15 to depths of 0 to 6 inches, and 6 to 12 inches. Irrigation. Because winter and spring precipitation in the area is limited and unreliable, irrigation is necessary for satisfactory germination. Each planting date treatment was irrigated about two weeks before planting, except the May 10 planting. In 1994, wet conditions in late April prevented timely soil preparation and pre-irrigation of the May 10 planting. This treatment was irrigated immediately after planting. Beans were irrigated five to seven times at seven- to ten-day intervals, as required during the growing season. Weed control. Bentazon (Basagran) and sethoxydim (Poast) were applied as needed for postemergence weed control. Beans were cultivated as necessary for weed control, and to clean irrigation rows. Dr. Blaylock is assistant professor at the University of Wyoming, Powell Research and Extension Center
Fluid Journal 1996-1998