In Part 1 of a presentation on methodology for valuing quality of feed ingredients, Dr. Hans H. Stein discusses the nutrient composition of ingredients. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Ferdinando Almeida, Ph. D. student in the Stein Monogastric Nutrition Lab, discusses his research into amino acid digestibility and concentration of digestible and metabolizable energy in a co-product of synthetic threonine production fed to weanling pigs. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Dr. Rommel Sulabo, post-doctoral research fellow in the Stein Monogastric Nutrition Lab, presents the results of research into amino acid digestibility and energy content of copra expeller, palm kernel expeller, and palm kernel meal fed to growing pigs. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Jung Wook Lee, master's student in the Stein Monogastric Nutrition Lab, summarizes the current state of his research into the effects of added tallow, palm kernel oil, corn germ, and glycerol on growth performance and carcass characteristics of pigs fed DDGS-based diets. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Caroline Gonzalez-Vega, master's student in the Stein Monogastric Nutrition Lab, discusses her research into amino acid digestiblity in alternative oilseed products fed to weanling pigs. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Oscar Rojas, master's student in the Stein Monogastric Nutrition Lab, summarizes his research comparing digestibility of phosphorus and amino acids in fermented soybean meal with conventional soybean meal and fish meal fed to weanling pigs. Adapted from a presentation at the 2011 ADSA-ASAS Midwest Sectional Meeting, Des Moines, IA, March 14-16 2011.

Dr. Grant Petersen presents results of two experiments to determine the ideal ratio of tryptophan to lysine in diets for 10 to 20 kg pigs.

Dr. Grant Petersen presents the results of three experiments to determine the requirements for lysine and tryptophan in swine diets containing corn and soybean meal, field peas, or high-protein distillers dried grains with solubles.

Dr. Hans H. Stein explains the different ways of calculating phosphorus digestibility and discusses the advantages of using standardized total tract digestibility values. Dr. Stein also presents findings on the use of microbial phytase in swine diets to increase phosphorus digestibility, eliminate the need for supplementation with dicalcium phosphate, and decrease excess phosphorus excretion.

Ph. D. student Ferdinando Almeida presents the results of an experiment to measure the digestibility of phosphorus in blood meal and spray-dried plasma.