Water Quality Assessments in the Mississippi Delta : Regional Solutions, National Scope Book

	Preface
1	Mississippi Delta Management Systems evaluation area : overview of water quality issues on a watershed scale	1
2	Watershed research of the U.S. Department of Agriculture : an evolution in mission	16
3	Surface water quality in the delta of Mississippi	30
4	Agricultural practices of the Mississippi Delta	43
5	Evaluation of best management practices in the Mississippi Delta Management Systems evaluation area	61
6	Groundwater nutrients in the Beasley Lake watershed of the Mississippi Delta Management Systems evaluation area	75
7	Pesticides in shallow ground water and lake water in the Mississippi Delta Management Systems evaluation area	91
8	Suspended sediment and agrochemicals in runoff from agricultural systems in the Mississippi Delta : 1996-2000	104
9	Evaluation of watershed management practices on Oxbow Lake ecology and water quality	119
10	Dynamics of herbicide concentrations in Mississippi Delta Oxbow Lakes and the role of planktonic microorganisms in herbicide metabolism	134
11	Precision farming technologies for weed control in the Mississippi Delta	150
12	Fluometuron adsorption to soil influenced by best management practices : established filter strip and riparian zones	164
13	Spatial variability of cyanazine dissipation in soil from a conservation-managed field	179
14	The role of vegetated drainage ditch research in the Mississippi Delta : current results and future directions	194
15	Weed populations as related to conservation tillage and reduced herbicide management systems : Mississippi Delta Management Systems evaluation area	204
16	A watershed based bioeconomic model of best management practices in Mississippi	218
17	Herbicide and nitrate in surface and ground water : results from the Iowa Management Systems evaluation area	235
18	National needs, regional solutions : the development of site-specific assessments of pesticides in water resources	251
	Author index	267
	Subject index	268