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Fluid Journal : Fluid Journal 1999-2001
Fall 2001 Fluid Journal 3 than when applied 2 inches beside and 2 inches below the seed (Figure 3). Dribble application of starter in a narrow surface band 2 inches to the side of the seed row resulted in yields equal to the 2 x 2 applied starter. In this year, surface band application was equal to sub-surface starter placement. The band-over-the- row treatment resulted in yields greater than the in-furrow treat- mentbutlessthanthe2x2or surface band treatments. N rate. Grain yield and V-6 dry matter accumulation was lower in the starter treatment that included only 5 lbs/A of N. Methodology Location. Studies were con- ducted at the North Agronomy Farm at Manhattan, Kansas (dryland) and the North Central Experiment Field at Scandia, Kansas (irrigated). Placement. At Manhattan on continuous no-till corn, place- ments included: in-furrow, over the row (surface band), and 2 x 2 (2 inches below and 2 inches to the side of the seed); at Scandia on irrigated no-till corn, place- ments included: in-furrow, 2 x 2, over the row, and surface band 2 inches to the side of the row. N rate. Total N was balanced on all treatments at 150 lbs/A (Manhattan) and 220 lbs/A (Scandia). Fertilizers. P and K were included in all starters. Starters were formulated with UAN, 7-21- 7 (Manhattan), 10-34-0 and potassium thiosulfate (Scandia), and ammonium thiosulfate (Manhattan). Planting. Corn was planted on April 7 at Manhattan, while at Scandia it was planted on April 12. Dr. Lamond is professor in the Department of Agronomy, Kansas State University and Dr. Gordon is professor at the North Central Kansas Experimen- tal Fields, Kansas State University. Figure 3. Corn yield response to in-furrow and 2 x 2 placement of starters using different NPK formulations, Scandia, Kansas, 2000. YIELD-BU/A 132 140 148 156 164 172 180 188 196 5-15-5 15-15-5 30-15-5 45-15-5 60-15-5 N/P2O5/K2O - LBS/A IN-FURROW 2x2 NO STARTER
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