Excerpt from Agricultural Economics Research, Vol. 15: April, 1963 In developing the model it was further assumed that (1) no interaction occurs between the dif ferent stages, (2) there is no grazing before the time the rangeland reaches grazing readiness, and (3) there is no residual response to fertilization. The simplifying assumptions were incorporated because of data limitations rather than because of any constraints imposed by the general model. Stage 3 is concerned with the conversion into a livestock product of feed consumed. For the purposes of this paper, the livestock product is assumed to be a final product, all of which is sold. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.