Science/Nature

Science/Nature

Cover Crops, Forages and Grazing

Kimberly Cassida, Forage Extension Specialist at Michigan State University, discusses how to use cover crops as forage crops for animals, worms and insects. Cassida provides a list of plants that traditionally were used as forages which now are being used as cover crops.

Cover Crops as a Nutrient Source

Laura Van Eerd, Associate Professor of Soil Fertility and Cover Crops at the University of Guelph, discusses the use of nitrogen as a nutrient source for cover crops. Van Eerd explains the nitrogen cycle and how to minimize nitrogen loss while maximizing nitrogen in the soil.

The Science of Soil Health

Jerry Hatfield, Laboratory Director and Plant Physiologist at the USDA Agricultural Research Service, explains why soil health is important, how soil degrades, how to enhance soil, how cover crops fit into the picture and the future demands of agriculture.

Cover Crops and Water Quality

Tom Kaspar, Plant Physiologist at the USDA Agricultural Research Service, presents the nitrate levels in the Raccoon River in Des Moines, Iowa. Kaspar discusses the reasons for high levels of nitrogen in the water and suggests ways to lower the levels.

Reducing Soil Erosion and Improving Soil Health

Eileen Kladivko, Professor of Agronomy at Purdue University, explains how to integrate cover crops to maintain nutrient levels from the time the crops have been harvested until the next planting season. Kladivko also discusses how cover crops protect the soil and reduce erosion by wind and water.

Cosmic Chemistry

Christy Tremonti, Assistant Professor in the Department of Astronomy at UW-Madison, discusses where chemical elements come from and how they are distributed throughout the universe. Tremonti explains how life is influenced by common chemical elements in the universe.

Five Myths About the Scientific Revolution

Nancy Turner, Professor in the College of Liberal Arts and Education at UW-Platteville, debunks five commonly held misconceptions concerning the Scientific Revolution. Turner focuses on the sun-centered universe, magic, the Protestant Reformation, alchemy and the discoveries in medicine, biology, astronomy and physics.

Natural Atmospheric CO2 and Human History

David Archer, Professor of Geophysical Sciences at the University of Chicago, explains the relationship between the use of fossil fuel, the natural concentration of carbon dioxide in the atmosphere and the ability of human society to recognize and understand anthropogenically triggered climate change.

Charles Van Hise's Field Notebooks

Carol McCartney, Outreach Manager at the Wisconsin Geological and Natural History Survey, focuses on the geological research of the Lake Superior region conducted by Charles Van Hise. McCartney discusses Van Hise’s work, shows samples of rocks and maps, and shares data from his approximately 450 field notebooks. In 2011, Van Hise’s field notebooks were scanned into the UW Digital Collection.

Good Handling Skills and Dairy Cow Comfort

Katy Proudfoot, Assistant Professor of Veterinary Medicine at The Ohio State University, addresses ways to identify and measure the level of comfort in a dairy cow. Proudfoot identifies risk factors and offers suggestions for creating an environment that provides optimal comfort.

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