| Autor: |
Dale Monks, C. H. Burmester, Mark Dougherty, Larry M. Curtis, John P. Fulton |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
2007 Minneapolis, Minnesota, June 17-20, 2007. |
| DOI: |
10.13031/2013.22980 |
| Popis: |
Results are presented for a first year study that investigates different fertigation treatments for cotton produced using precision agriculture in the Tennessee Valley of Alabama. The study evaluates the timing and placement of soluble nitrogen and potassium (K2O) fertilizer on cotton using four different fertigation treatments and a non-fertigated control irrigated with sub-surface drip irrigation (SDI) tape. The pressure-compensating SDI product was installed in 2005 using an auto-guidance system to ensure all tape runs are precisely located parallel and 80 inches apart. The experimental plots consist of four replications of five eight-row treatments that compare four fertigation management scenarios and one conventional side-dress treatment. Each of the resulting twenty treatment plots has eight 360-foot rows of cotton on 40-inch row spacing, with SDI tape buried approximately 15 inches between every other row of cotton. The response to treatments is quantified by measuring yield, quality, and nutrient uptake of the cotton. Results show that fertigated cotton yields were higher than the non-fertigated control, with higher yields observed in the three treatments receiving fertigation within 50 days of square. The two highest yielding treatments also received 20 and 40 pounds, respectively, of pre-plant surface nitrogen and potassium. Fertigated cotton yields averaged 3.0 bales per acre compared with 2.6 bales per acre for the non-fertigated control and 2.2 bales per acre in a nearby sprinkler-irrigated study. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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