Literature + Algae + Billion Ton Report 2005 + Biomass Feedstock Cultivation + Energy Data Books + Land Use Impacts + Models and Applications + Switchgrass + New Feedstock Research
Ground-based data on crop production in the USA is provided through surveys conducted by the National Agricultural Statistics Service (NASS) and the Census of Agriculture (AgCensus). Statistics from these surveys are widely used in economic analyses, policy design, and for other purposes. However, missing data in the surveys presents limitations for research that requires comprehensive data for spatial analyses.We created comprehensive county-level databases for nine major crops of the USA for a 16-yr period, by filling the gaps in existing data reported by NASS and AgCensus.
Two of the most widely used land-cover data sets for the United States are the National Land-Cover Data (NLCD) at 30-m resolution and the Global Land- Cover Characteristics (GLCC) at 1-km nominal resolution. Both data sets were produced around 1992 and expected to provide similar land-cover information. This study investigated the spatial distribution of NLCD within major GLCC classes at 1-km unit over a total of 11 agricultural-related eco-regions across the continental United States.
For several years the Idaho National Laboratory (INL) has been developing a Decision Support System for Agriculture (DSS4Ag) which determines the economically optimum recipe of various fertilizers to apply at each site in a field to produce a crop, based on the existing soil fertility at each site, as well as historic production information and current prices of fertilizers and the forecast market price of the crop at harvest.
The GTAP Land Use Data Base and the GTAPE-AEZ Model: Incorporating Agro-Ecologically Zoned Land Use Data and Land-based Greenhouse Gases Emissions into the GTAP Framework
The paper describes the new GTAP land use (LU) data base constructed via the funding form the United States Environmental Protection Agency (US-EPA). The GTAP LU data base is the output from the collaboration between GTAP center, University of Wisconsin-Madison, and the Ohio State University. We also present the GTAPE-AEZ model, which illustrates how land use and land-based emissions can be incorporated in the CGE framework for Integrated Assessment (IA) of climate change policies.
Our ability to change ourselves and our surroundings incrcases with each technological advance. Changes today are more ertensive and occur more rapidly than ever before. The significance of these changes incrcases as the world's population grows, the available land base declines, and the resiliency of our environment becomes increasingly taxed. As a result,m any organizationsn eed to monitor changei n land cover and land use. While ertensive rcsearch has been completed on various change detection methods, Iittle work has been done to implement the technologiesi n a commercial environment.
Methodology for Estimating Removable Quantities of Agricultural Residues for Bioenergy and Bioproduct Use
A methodology was developed to estimate quantities of crop residues that can be removed while maintaining rain or wind erosion at less than or equal to the tolerable soil-loss level. Six corn and wheat rotations in the 10 largest corn-producing states were analyzed. Residue removal rates for each rotation were evaluated for conventional, mulch/reduced, and no-till field operations.
We have completed a preliminary model of the life cycle energy and environmental flows associated with the production of bioethanol from corn stover (the residue of corn harvesting). These results are extremely preliminary, and should not be widely distributed until more time is available to appropriately vet the model and its results. Of particular concern is the observation that, overall, the residue removal rates required to minimize soil erosion were not sufficient to maintain overall soil carbon levels.
Presentation given at Bioenergy 2000 - The Ninth Biennial Bioenergy Conference in Buffalo, NY, as part of The Bridge to Corn Ethanol session held on October 16, 2000.