The objective of this study was to evaluate the effect of different types of supplements on the performance of yearling steers grazing an annual forage crop (Sorghum bicolor L. moench) and its subsequent influence on carcass quality traits. 50 Hereford steers (265.3 kg live weight - LW) of 15 months of age grazing at a 7.5 steers/ha stoking rate were randomly allotted to 5 treatments (T):T1 - no supplement; T2 - soy expeller; T3 - sunflower expeller; T4 - rice bran; T5 - maize (T2 to T5 had a 0.5%LW supplementation rate).

The Uruguayan Beef Quality Audit evaluates the industry efforts to improve beef quality every 5 years. The third was held between April and December 2013 in 10 packing plants, assesing breed-type, brands, horn and mud/manure, bruises, offal and carcass condemnation and carcass quality. Breed-types were mainly Hereford [39.4%), British crosses (17.8%) and Aberdeen Angus (25.6%). Most cattle had no mud/manure on their hides (87.1%). Only 70.9% of the cattle had horns but 71% of carcasses were bruised, and Type 2 doubled the incidence registered in 2007 (28 vs 14%).

The Uruguayan Beef Quality Audit evaluates the industry efforts to improve beef quality every 5 years. The third was held between April and December 2013 in 10 packing plants, assesing breed-type, brands, horn and mud/manure, bruises, offal and carcass condemnation and carcass quality. Breed-types were mainly Hereford [39.4%), British crosses (17.8%) and Aberdeen Angus (25.6%). Most cattle had no mud/manure on their hides (87.1%). Only 70.9% of the cattle had horns but 71% of carcasses were bruised, and Type 2 doubled the incidence registered in 2007 (28 vs 14%).

¿Por qué es importante controlar la garrapata? ¿Cuál es el ciclo de la garrapata y qué medidas debemos tomar?. Ciclo parasitario. Generaciones de garrapatas y tratamiento generacional. ¿Qué es la resistencia?. Garrapaticidas. Control o erradicación. Puntos importantes para controlar la garrapata. Residuos químico en las carnes.

ABSTRACT. The effect of shearing ewes at 50 days of gestation on birth and weaning weight, vigour of the lambs in the first hour of life and the survival of single and twin lambs was investigated.