Production Summary from WICST and the Biofuels Trial

The Energy Independence and Security Act of 2007 set a target of 36 billion gallons of biofuel to be produced annually within the USA by 2022. Of the total 36 billion gallons, 16 billion is to come from cellulosic ethanol and 5 billion gallons from biomass-based diesel and other “advanced biofuels” (from feedstocks other than […] More »

Endogeic and Anecic Earthworm Abundance in Six Midwestern Cropping Systems

ABSTRACT Endogeic and juvenile anecic abundance was measured in soil samples and anecic populations were studied by counting midden numbers at the sites of two long-term cropping systems trials in South-central Wisconsin. The three grain and three forage systems at each site were designed to reflect a range of Midwestern USA production strategies. The primary […] More »

The Wisconsin Integrated Cropping Systems Trials: Yields, Yield Variability, and Yield Trends 1990-2002.

In 1990, a large scale, and long-term study entitled the Wisconsin Integrated Cropping Systems Trial (WICST) was initiated at two locations in southern Wisconsin. The purpose of the project was to compare alternative grain and forage-based systems using three performance criteria: 1) productivity; 2) profitability; and, 3) environmental impact. An obvious initial criterion in comparing […] More »

Vertical Distribution Of Phosphorus Under Long-Term Cropping Trials

Abstract: Historically, due to its high soil fixation rates and low solubility, phosphorus has not been considered an environmental menace, but years of over-application and the shift in American agriculture from small family farms to large corporate enterprises (McDowell et al., 2001; Sharpley et al., 2001) has led to phosphorus buildup and leaching in many […] More »