Response of Cotton to Residual and Applied Nitrogen on Two Coastal Plain Soils

M.E. Walker, S.H. Baker, and B.G. Mullinix, Jr.


 
ABSTRACT

Research was begun at Tifton and Midville, Georgia in 1978 to measure yield response nitrate concentration in the soil-plant system with varying rates of nitrogen applied for cotton. The objective of the experiments was to develop a nitrogen-use curve for making nitrogen fertilizer application to the need of cotton under Georgia conditions. Experimental plots received adequate phosphorus and potassium fertilizer Nitrogen rates of 0, 22, 45, 67, 90, 112 and 179 kg/h were applied each year with one-third at planting and two-thirds as sidedress. Cotton grown on the Tifton and Dothan soil showed a significant increase in yield with 22 and 45 kg/ha of nitrogen, respectively. From petiole nitrate-nitrogen and yield data obtained from the two soil types and estimated ranges of sufficient N for cotton has been developed for Georgia soils. Additional research showed that foliar applied urea increased the yield of cotton on Dothan and Tifton soils.



Reprinted from 1985 Proceedings: Beltwide Cotton Production Research Conferences pg. 306
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998