|Mitchell, Charles - AUBURN UNIVERSITY|
|Delaney, Dennis - AUBURN UNIVERSITY|
Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: October 31, 2004
Publication Date: October 31, 2004
Citation: Mitchell, C.C., Delaney, D.P., Balkcom, K.S. 2004. Alabama's "cullars rotation" experiment (c. 1911) on national register of historical places [abstract]. American Society of Agronomy Meetings. CDROM Technical Abstract: The Cullars Rotation experiment (circa 1911) on the campus of Auburn University was placed on the National Register of Historical Places in April, 2003. It joins the nearby Old Rotation experiment (circa 1896) as one of only 5 field crop research sites in the U.S. to receive this honor. It is Amercia's oldest cotton fertility experiment, the oldest soil fertility study in the South, and the second oldest, continuous cotton study in the world. The Cullar's Rotation experiment continues to document long-term trends in non-irrigated crop yields and soil changes due to variable rates of P, K, S, micronutrients and lime. It provides a valuable and accessible teaching tool for monitoring crop nutrient deficiencies on five crops during the year, cotton, corn, soybean, wheat, and crimson clover. It also is a source of uniform siol (fine-loamy, siliceous, thermic Typic Kanhapludults) with variable fertility conditions for allied studies. No other such resource exists in the Coastal Plain of the southern United States. Long-term records indicate that potassium is the most limiting nutrient in cotton production on this site. Phosphorus is most limiting for corn, wheat, soybean and clover. Long-term nutrient accumulation and leaching have been documented on this site.