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Article citations


Hutmacher, R.B., Travis, R.L., Rains, D.W., Vargas, R.N., Roberts, B.A., Weir, B.L., Wright, S.D., Munk, D.S., Marsh, B.H., Keeley, M.P., Fritschi, F.B., Munier, D.J., Nichols, R.L. and Delgado, R. (2004) Response of Recent Acala Cotton Cultivars to Variable Nitrogen Rates in the San Joaquin Valley of California. Agronomy Journal, 96, 48-62.

has been cited by the following article:

  • TITLE: In-Season Side-Dressing of Urea and Ammonium Nitrate to Cotton on No-Till Soils with High Residual Nitrogen and Pre-Plant Nitrogen Application

    AUTHORS: Xinhua Yin

    KEYWORDS: UAN, Side-Dress, Cotton, Yield, N Consumption

    JOURNAL NAME: Open Journal of Soil Science, Vol.5 No.11, November 26, 2015

    ABSTRACT: It is essential to develop innovative approaches that can apply N more efficiently. The objective of this study was to examine in-season side-dress urea and ammonium nitrate (UAN) applications to cotton on no-till soils with high residual N fertility. A field trial was conducted near Milan, TN in 2011 and 2012 with strip plots in a RCB design with three replicates. The following six in-season side-dress fluid UAN treatments were compared: 1) zero N; 2) low uniform-rate N application of 56 kg·N·haǃ 3) high uniform-rate N application of 78.4 kg·N·haǃ 4) ordinary variable-rate N application algorithm for each sub plot based on the average Normalized Difference Vegetation Index (NDVI) value in that sub plot; 5) reversed variable-rate N application algorithm for each sub plot based on average NDVI of that sub plot; and 6) N application rate based on the average NDVI value in each strip plot. All plots received 26 kg·N·haǃ as diammonium phosphate before cotton planting each year. Leaf N concentrations were mostly enhanced with all side-dress N applications ranging from 56 to 78 kg·N·haǃ relative to zero N during early to late bloom although this upland field had high initial soil N fertility and received pre-plant application of 26 kg·N·haǃ across the treatments each year. However, NDVI, plant height, and lint yield were rarely improved with side-dress N application. The three variable-rate N application algorithms consumed 7.8 to 12.3 kg·haǃ more N than the low uniform-rate application of 56 kg·N·haǃ, but 10.1 to 14.6 kg·haǃ less N than the high uniform rate of 78.4 kg·N·haǃ. Our results indicate that the current N recommendations for cotton in Tennessee may be too high on upland soils with high initial N fertility.