The Cooperative Extension Service, University of Arkansas, has conducted Cotton Research Verification Program (CRVP) demonstrations since 1980. This whole-field program is used to demonstrate the effective use of research-based crop production information in real-world production systems. The CRVP has been very effective over the years in introducing new technology and concepts into Arkansas production systems. Fields are enrolled in the CRVP by growers and are selected based on specific criteria, including the potential for producing a profitable crop. Where production problems are found, management to correct these problems in the CRVP fields is also generally applicable to other growers in the area with similar problems. A yield limitation that is frequently found in Arkansas cotton fields is plant-parasitic nematodes. Both the root-knot nematode (RKN) and the reniform nematode (RN) are present in the state and can cause significant yield suppression. A three-year evaluation of two CRVP fields was conducted to determine the influence of crop rotation in control of RN. Results indicate that either rice or corn for a single year lowers RN population densities significantly. Unfortunately, RN numbers resurge rapidly during the first year the field is planted back to cotton.