The performance of a model developed to simulate organic matter and nitrogen dynamics in integrated aquaculture/agriculture systems was evaluated using sensitivity analysis and model verification procedures with data from three sites. The model sensitivity analysis results were used to identify parameters that required high accuracy in measurement, and to suggest areas of future research in int...

The intensification and expansion of modern agriculture is amongst the greatest current threats to worldwide biodiversity. Over the last quarter of the 20th century, dramatic declines in both range and abundance of many species associated with farmland have been reported in Europe, leading to growing concern over the sustainability of current intensive farming practices. Purportedly sustainable...

Technology under a grant from the Rural Business-Cooperative Service, U.S. Department of Agriculture. These organizations do not recommend or endorse products, companies, or individuals. ATTRA is located in the Ozark Mountains at the University of Arkansas in Fayetteville (P.O. Box 3657, Fayetteville, AR 72702). ATTRA staff members prefer to receive requests for information about sustainable ag...

Dept Pathobiology, University of Guelph: Andrew Peregrine, Krishna Shakya, Jacob Avula, Silvina Fernandez (formerly) Dept Population Medicine, University of Guelph: Andria Jones, Paula Menzies, David Kelton, America Mederos (formerly), Alessia Guthrie (formerly), Laura Falzon (PhD candidate), Bradley de Wolf (MSc candidate), Dept. Health Management, University of Prince Edward Island: John VanL...

Organic agriculture is one of the most widely known alternative production systems advocated for its benefits to soil, environment, health and economic well-being of farming communities. Rapid increase in the market demand for organic products presents a remarkable opportunity for expansion of organic agriculture. A thorough understanding of the context specific motivations of farmers for adopt...

Introduction Based on the interest among organic farmers in Iowa for an unbiased analysis of the many natural soil amendment/fertilizer and compost products on the market for certified organic vegetable and herb crop production, several experiments have been conducted (Delate 1999). According to the USDA Economic Research Service, statistics on organic production in the U.S. lag far behind thos...