Block supplements are a convenient mechanism for delivering supplemental nutrients to grazing beef cattle. As the labels on most blocks or tubs state, they are meant to be used as supplements, not feeds.
The Brush Busters website will give you advise in controlling: Mesquite, Cedar, Huisache, Macartney Rose, Pricklypear, Saltcedar, Tallowtrees and Yucca.
The Small Scale Web-Based Program is targeted for small scale farmer/ranchers in need of agricultural courses to address some of the most common small scale enterprises and problems.