Supplement feed efficiency of growing beef cattle grazing native grasslands during winter: a collated analysis.

Supplementing growing cattle grazing native subtropical grasslands during winter improves the low, even negative, average daily weight gain (ADG) typical of extensive animal production systems in Uruguay. Nonetheless, to render the practice profitable, it is crucial to control supplement feed efficiency (SFE), that is, the difference in ADG between supplemented and control animals (ADGchng) per unit of supplement dry matter (DM) intake. Little has been studied specifically on how SFE varies in these systems.

Bioethanol production using high density crops in Uruguay.

Experimental scale crops for , , and , at 2,220, 4,440 and 6,660 trees ha were established in two soil units, at Paysandú and Tacuarembó, Uruguay. Wood samples were taken from twenty-two-months-old trees, and were used to produce bioethanol by pre-hydrolysis simultaneous saccharyfication and fermentation process (PSSF). Cellulose and lignin content was analyzed.