Submitted to: Agricultural Experiment Station Publication
Publication Type: Experiment Station
Publication Acceptance Date: 5/1/2005
Publication Date: 5/1/2005
Citation: Mitchell, C.C., Delaney, D.P., Balkcom, K.S. 2005. 2005 yields on the cullars rotation (circa 1911). In: Lawrence, K. s., Monks, C.D., Delaney, D. P., editors. 2005 Cotton Research Report, Alabama Agricultral Experiment, Research Report No. 28.
Technical Abstract: The Cullars Rotation is the oldest, continuous soil fertility experiment in the southern United States and the second oldest experiment in the world that includes cotton. It was placed on the National Register of Historical Places in 2003. It continues to document the long-term yield trends of five crops in a three-year rotation with 14 soil fertility variables replicated three times. The 2005 growing season was characterized by a wet summer and dry fall. While long-term trends seem to indicate higher yields on the well-fertilized plots, the plots with low levels of one or more nutrient continue a trend toward lower and lower yields.