Two experiments were conducted to determine the influence of dietary roughage concentration and feed intake on finishing steer performance and ruminal metabolism. In Exp. 1, 126 steers (334 kg) were used in a completely randomized design and fed (120 d) diets of steam-rolled wheat without roughage or containing 5, 10 or 15% roughage (50% alfalfa hay:50% corn silage). Steers fed 5 or 10% roughag...

precision agriculture is continuously trying to address the sources and factors affecting the in-field variability and taking appropriate managerial decisions. one of the popular research focuses in the recent three decades has been on the development of new approaches to making yield variability maps. advancement in development of sensors and the importance of quality factor in high value crop...

D IGESTION experiments with cattle fed simplified rations produced results in this laboratory indicating that efficiency of roughage dry matter digestion was dependent upon the presence or absence of certain ration nutrients or feed components needed by rumen microorganisms. The nutrients or feed components which favorably influenced roughage digestion in cattle experiments were protein (N X6.~...

Ruminants prefer hay cut in the afternoon to hay cut in themorning, presumably because hay cut in the afternoon contains higher concentrations of non-structural carbohydrates than hay cut in the morning. We determined if adding sugars (glucose and sucrose) to ground hay would account for differences in preference and affect intake of hay. Alfalfa hay cut either in the afternoon (PM) or the foll...

Heaves, an obstructive neutrophilic airway inflammation of horses, is triggered by dust components such as endotoxin and has similarities to human asthma. Pulmonary intravascular macrophages (PIMs) increase horses' sensitivity to endotoxin-induced lung inflammation; however, their role in an airborne pathology remains unknown. Therefore, we investigated the role of PIMs in the development of he...

Hart and associates (1) have shown that milking goats, when fed a green feed, have been able to utilize the calcium to a higher degree than when fed dry feed. They state that “apparently there is something having its source in fresh green materials, which controls or assists calcium assimilation.” Hart and associates (2) have also reported evidence secured with milking cows that it is possible ...