Federation of Animal Science Societies (FASS) - Scientific Advisory Committee on Environment, Waste Management, and Ecosystems

Committee Members

Dr. Deanne M. Meyer, Chair
University of California - Davis
One Shields Avenue
Davis, CA 95616
Phone: (530) 752-9391
Fax: (530) 752-0175
Email: dmeyer@ucdavis.edu

Dr. Casey Ritz
University of Georgia
Dept of Poultry Science
306 Poultry Science Bldg
Athens, GA 30602
Phone: 706-542-9139
Fax: (706) 542-8383
Email: critz@uga.edu

Dr. Joe Harrison
Professor - Dairy Scientist
Washington State University
Extension Center
7612 Pioneer Way E
Puyallup, WA 98371-4998
Phone: (253) 445-4638
Fax: (253) 445-4571
Email: jhharrison@wsu.edu

Dr. Susan Watkins
Extension Poultry Specialist
University of Arkansas
Dept of Poultry Science
1260 West Maple
Fayetteville, AR 72701
Phone: (479) 575-7902
Fax: (479) 575-8775
Email: swatkin@uark.edu

Dr. Joel DeRouchey
Kansas State University
126 Weber Hall
Manhattan, KS 66506-0201
Phone: (785) 532-2280
Fax: (785) 532-7059
Email: jderouch@ksu.edu

Dr. Shawn Archibeque
Assistant Professor
Colorado State University
Dept of Animal Sciences
Fort Collins, CO 80523-1171
Phone: (970) 491-6649
Email: shawn.archibeque
@colostate.edu

Dr. Katherine F. Knowlton
Virginia Tech
Dept Dairy Science
3270 Litton Reaves Hall
Blacksburg, VA 24060-0315
Phone: (540) 231-5287
Fax: (540) 231-5014
Email: knowlton@vt.edu

Documents prepared by the Scientific Advisory Committee on Environment, Waste Management, and Ecosystems

Feed and Animal Management for Beef Cattle

Beef cattle feeding operations typically include weaned calves that are fed to market weight or stocker cattle finished in feedlots. For short time periods, beef cows may also be fed in confinement. Distinctly different diets, generally differing in the relative amount of roughage to concentrate levels, are required for the different weights or stages of the life cycle. This results in great differences in the volumes of manure produced and the nutrient compositions of manure from the different life stages. This fact sheet briefly highlights some factors affecting nutrient excretion with potential dietary adjustments that can be used to minimize excess nutrient excretion. Read More

Feed and Animal Management for Dairy Cattle

Dairy operations typically include the milking cowherd with some of the cow population in the non-lactation stage (dry cows) and with growing heifers. Distinctly different diets are required for each of these three stages of the life cycle resulting in great differences in the volumes and nutrient compositions of manure. This fact sheet briefly highlights some factors affecting nutrient excretion with potential dietary adjustments to minimize excess nutrient excretion. Read More

Feed and Animal Management for Swine

Swine operations may include a complete farrow to finishing unit, or various combinations of separate units for feeder pig production, finishing pigs or the breeding herd. Distinctly different diets are required for each of these stages of the life cycle resulting in great differences in the volumes and nutrient composition of the manure produced. This fact sheet briefly highlights some factors affecting nutrient excretion, including potential dietary adjustments that can be used to minimize excess nutrient excretion. Read More

Feed and Animal Management for Poultry

Commercial poultry operations involve four types of birds, broiler chickens (meat producing), layer (table egg ) chickens, turkeys and ducks that differ greatly in size and their nutrient requirements. Breeder flocks for each of the major species are also a major part of the industry, and those flocks also have different nutrient requirements. Distinctly different diets are required for each of these species and the different stages of each species life cycle. These result in great differences in the volumes and nutrient compositions of the manure produced by the different groups. This fact sheet briefly highlights some factors affecting nutrient excretion. Read More

Dietary Adjustments to Minimize Nutrient Excretion from Livestock and Poultry

The table below provides "potential" reductions in the excretion of nutrients with dietary and/or feeding management adjustments for livestock and poultry. Read More

Effects of Diet and Feeding Management on Nutrient Contents of Manure

The development and implementation of comprehensive nutrient management plans (CNMP) for livestock and poultry operations is an approach to evaluate, adjust, properly utilize and possibly reduce the excretion of potentially environmentally damaging nutrients within the operation. Proper management of the diets of farm animals can be a valuable tool for reducing nutrient excretion , thereby significantly reducing potentially negative impacts on the environment. One component of the CNMP is feed management. In this fact sheet, a summary of basic principles on nutrition and feed management, and potential adjustments that can be made for livestock operations to minimize nutrient excretions is described. Read More