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Water Quality Monitoring- What Is Being Detected?, David E. Stoltenberg Dec 1989

Water Quality Monitoring- What Is Being Detected?, David E. Stoltenberg

Proceedings of the Integrated Crop Management Conference

Due to the concern over the impact of agricultural chemical use on water quality, the amount of water quality monitoring data has increased substantially during the last few years. Several groundwater surveys for nitrates and pesticides have been conducted in the Midwest. A partial list includes surveys conducted in Illinois, Kansas. Minnesota. Missouri. Nebraska. Ohio, and Wisconsin.


Cooperative Extension Service On-Farm Demonstration Projects, Gerald Miller Dec 1989

Cooperative Extension Service On-Farm Demonstration Projects, Gerald Miller

Proceedings of the Integrated Crop Management Conference

Demonstration projects at Iowa State University are a major program thrust supported by separate contracts with state agencies. The projects are • the Integrated Farm Management Demonstration Project, • the Big Spring Basin Demonstration Project, and • the Model Farms Demonstration Project.


Weed Science Update 1990, Micheal D. K. Owen Dec 1989

Weed Science Update 1990, Micheal D. K. Owen

Proceedings of the Integrated Crop Management Conference

There are a number of major considerations with regards to weed management in 1990. Several weed species have been identified as potentially serious statewide problems. Herbicide carryover has the potential to be an issue in 1990 and should be considered seriously as decisions are made for crop rotation, tillage, and herbicide selection. Finally, there are several herbicide candidates that demonstrate significant weed control and may impact overall weed management choices in 1990.


Effect Of Enrvironmental Conditions On Weed/Herbicide Interactions, Micheal D. K. Owen Dec 1989

Effect Of Enrvironmental Conditions On Weed/Herbicide Interactions, Micheal D. K. Owen

Proceedings of the Integrated Crop Management Conference

Environmental conditions, notably soil moisture, temperature, radiation, and, relative humidity, affect plant growth. Further, the environment affects herbicide properties whether soil-applied or applied postemergence to plants. The interaction of the herbicidal properties and the plant growth characteristics results in the plant response. Generally, the plant growth characteristics are the most important component influencing herbicide activity. This paper will discuss the effect of environmental conditions on plants, herbicides, and the ability of several herbicide additives to improve plant response to herbicides applied postemergence.


Herbicide Movement In Soils, Geoge F. Czapar Dec 1989

Herbicide Movement In Soils, Geoge F. Czapar

Proceedings of the Integrated Crop Management Conference

The effect of agricultural chemicals on groundwater quality continues to be a major concern. Although point source contamination is recognized as a significant factor, the extent of herbicide leaching from normal field use is not clear. Since herbicides are used on approximately 98% of the corn and soybeans acres in Iowa, it is important to understand herbicide movement under normal conditions.


Climate Changes And Impacts On Midwest Crop Production, S. Elwynn Taylor Dec 1989

Climate Changes And Impacts On Midwest Crop Production, S. Elwynn Taylor

Proceedings of the Integrated Crop Management Conference

Climate change has become a topic of worldwide concern. There are few locations where the general population has a greater vested interest in climate change than the Midwest. The economy of most Midwest communities is pr1marily dependent upon agriculture, and weather remains the primary uncontrollable factor inducing uncertainty in production. Perhaps the greatest potential effect of climate change is the influence on crops.