دورية أكاديمية
Response of Acala Cotton to Nitrogen Rates in the San Joaquin Valley of California
| العنوان: | Response of Acala Cotton to Nitrogen Rates in the San Joaquin Valley of California |
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| المؤلفون: | R.B. Hutmacher, R.L. Travis, R.L. Nichols, D.E. Rains, B.A. Roberts, B.L. Weir, R. M. Vargas, B. H. Marsh, S. D. Wright, D. S. Munk, D. J. Munier, M. P. Keeley, F. Fritschi, R. L. Delgado, S. Perkins |
| المصدر: | The Scientific World Journal, Vol 1, Pp 691-698 (2001) |
| بيانات النشر: | Hindawi Limited, 2001. |
| سنة النشر: | 2001 |
| المجموعة: | LCC:Technology LCC:Medicine LCC:Science |
| مصطلحات موضوعية: | Technology, Medicine, Science |
| الوصف: | The responses of Acala cotton (Gossypium hirsutum L.) in California to a range of applied nitrogen (N) treatments were investigated in a 5-year, multisite experiment. The experiment’s goals were to identify crop growth and yield responses to applied N and provide information to better assess the utility of soil residual N estimates in improving fertilizer management. Baseline fertilizer application rates for the lowest applied N treatments were based on residual soil nitrate-N (NO3-N) levels determined on soil samples from the upper 0.6 m of the soil collected prior to spring N fertilization and within 1 week postplanting each year. Results have shown positive cotton lint yield responses to increases in applied N across the 56 to 224 kg N/ha range in only 41% (16 out of 39) of test sites. Soil NO3-N monitoring to a depth of 2.4 m in the spring (after planting) and fall (postharvest) indicate most changes in soil NO3- occur within the upper 1.2 m of soil. However, some sites (those most prone to leaching losses of soluble nutrients) also exhibited net increases in soil NO3-N in the 1.2- to 2.4-m depth zone when comparing planting time vs. postharvest data. The lack of yield responses and soil NO3-N accumulations at some sites indicate that more efforts should be put into identifying the amount of plant N requirements that can be met from residual soil N, rather than solely from fertilizer N applications. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1537-744X |
| Relation: | https://doaj.org/toc/1537-744X |
| DOI: | 10.1100/tsw.2001.334 |
| URL الوصول: | https://doaj.org/article/6e46410e738041aeab0a2143950def6e |
| رقم الأكسشن: | edsdoj.6e46410e738041aeab0a2143950def6e |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1537744X |
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| DOI: | 10.1100/tsw.2001.334 |