Charles R. Ward

Mesquite twig girdler: a possible means of mesquite control.

example, the 4-practice combination increased gain bine all improvement practices that are profitable nearly 100 lb./steer over heavy grazing (Table 2). when used alone. Also, scientists and extension Since the cattle, rangeland, and improvement personnel should consider that combined practices practices used in the experiment were ,highly simiare generally additive, but they should also be lar to those used on ranches, cattlemen can genaware that some combinations may be more than erally expect similar results from combining these additive and that some may be influenced by comand other improvement practices. pensatory gains. However, the effect of combined practices cannot be additive if a limiting factor exists. For example, a rancher who has bred the best genetic potential into his cattle could not expect the gain response to be additive from combining shade, parasite control, needed minerals, and stilbestrol when insufficient pasture is the factor limiting gains. Literature Cited