1a.Objectives (from AD-416)
The objective of this cooperative research project is to evaluate best management practices consistent with the Conservation Effects Assessment Project (CEAP) that will reduce or mitigate detrimental effects of sedimentation and runoff on water quality and provide data that can be applied to TMDL standards.
1b.Approach (from AD-416)
Runoff plots are established at the Delta Branch Experiment Station to quantify the contribution of various BMPs toward reducing sedimentation and runoff in continuous cotton. These plots are approximately 170 m in length and are instrumented with flow meters and samplers to measure runoff volume, sediment load, and chemical loss under natural rainfall conditions. Composite runoff samples are taken at each runoff event. BMPs include no-tillage, rye cover crop, grass hedges, and grass filter strips. Crop yield and management inputs are quantified to obtain an economic analysis of the production system.
This is a newly-established agreement, but research is continuing from a previous cooperative agreement between the Southern Weed Science Research Unit, Stoneville, and MAFES. Runoff samples were collected at every rainfall event resulting in runoff, and samples were analyzed for sediment, nutrient and herbicide loss. Communication and coordination occurred via telephone and email and through Water Quality & Ecology Research Unit support personnel located at Stoneville.