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| Titel: |
Effect of Treating Field Spatial Variability in Winter Wheat at Different Resolutions |
| Auteur: |
Tubana, B. S. Arnall, D. B. Holtz, S. L. Solie, J. B. Girma, K. Raun, W. R. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 31 (2008) nr. 11 pagina's 1975-1998 |
| Jaar: |
2008-11 |
| Inhoud: |
This study was conducted to determine the scale at which spatial variability should be treated using an in-season nitrogen fertilization optimization algorithm (NFOA). Treatments included variable nitrogen (N) rate applications at three resolutions (0.84, 13.4, and 26.8 m2), two treatments of 90 kg N ha-1 fixed rate applied preplant or midseason, and a check plot. Treatments were arranged in a completely randomized design with three replications established at two locations for three years. On average, the NFOA-based N rates achieved a higher N use efficiency (NUE) of 41% compared with only 33% of the 90 kg N ha-1 fixed rate applied midseason. The highest NUE among the NFOA-based N rate treatments was 56% at 13.4 m2 resolution. These benefits were attributed to a large reduction in NFOA-based N rate recommendations. Determining midseason N rate requirements using NFOA at 13.4 m2 resolution resulted in increased NUE and net return to N fertilizer. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 13 gevonden artikelen
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