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Life Sciences Commons

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Environmental Sciences

2014

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Iowa State Research Farm Progress Reports

Articles 1 - 4 of 4

Full-Text Articles in Life Sciences

Above- And Below-Ground Biomass Production In Corn And Prairie Bioenergy Cropping Systems, Matthew Z. Liebman, Meghann Elizabeth Jarchow, Ranae N. Dietzel, David N. Sundberg Jan 2014

Above- And Below-Ground Biomass Production In Corn And Prairie Bioenergy Cropping Systems, Matthew Z. Liebman, Meghann Elizabeth Jarchow, Ranae N. Dietzel, David N. Sundberg

Iowa State Research Farm Progress Reports

The Comparison of Biofuel Systems (COBS) project is a long-term, 20-acre field experiment designed to provide quantitative, side-by-side comparisons of corn- and prairie-based biofuel feedstock production systems with respect to biomass yields, liquid fuel potential, and multiple environmental impacts. Here, we report on above- and below-ground biomass production from selected treatments.


Diesel Fuel Consumption During Field Operations, H. Mark Hanna, Dana D. Schweitzer Jan 2014

Diesel Fuel Consumption During Field Operations, H. Mark Hanna, Dana D. Schweitzer

Iowa State Research Farm Progress Reports

Direct energy expenses (diesel, gasoline, propane, electricity) total more than $1 billion annually for Iowa’s farmers. Farm management techniques such as adjusting tractor gear and throttle settings or reducing tillage depths can reduce diesel fuel consumption for row crop production. This study is being conducted over multiple years to measure the effects of energy management techniques on tractor fuel consumption during spring and fall field operations.


Impact Of Liquid Swine Manure Application And Cover Crops On Groundwater Quality, Carl H. Pederson, Matthew J. Helmers, Rameshwar S. Kanwar, Antonio P. Mallarino Jan 2014

Impact Of Liquid Swine Manure Application And Cover Crops On Groundwater Quality, Carl H. Pederson, Matthew J. Helmers, Rameshwar S. Kanwar, Antonio P. Mallarino

Iowa State Research Farm Progress Reports

The primary objective of this project was to determine the impact of appropriate rates of swine manure applications to corn and soybeans based on nitrogen and phosphorus requirements of crops, soil phosphorus accumulation, and the potential of nitrate and phosphorus leaching to groundwater. Another purpose of this long-term experimental study was to develop and recommend appropriate manure and nutrient management practices to producers to minimize water contamination potential and enhance the use of swine manure as fertilizer. A third component of this study was to determine the potential effects of rye as a cover crop to reduce nitrate loss to ...


Water Table Level As Influenced By Rainfall, Crop Requirements, And Tiling Method During The Past Two Years, Kenneth T. Pecinovsky, Jeffery D. Cook Jan 2014

Water Table Level As Influenced By Rainfall, Crop Requirements, And Tiling Method During The Past Two Years, Kenneth T. Pecinovsky, Jeffery D. Cook

Iowa State Research Farm Progress Reports

In 1979, a portion of the research farm was pattern tiled. This was used as an opportunity to compare tile installation methods: a conventional trenching machine (used widely prior to late 1970s) and a trenchless “tile plow” machine. The tile plow inserted plastic tile using a mole approach, which is the current primary tiling method. This research showed plow and trenching tiling methods were not significantly different and both provided adequate drainage. It also showed that water table measurements were influenced more by timing of water needs of the crop being grown and intensity of the rainfall event than tiling ...