Book Description

Excerpt from Cinchona Root and Collar Rot in Peru and Bolivia In Bolivia it was recommended that formal nurseries be established to produce hardy planting stock andsthat land-clearing methods be modified to avoid the destruction of the topsoil and thus permit the abandoning of the hueco planting method. It has not been ossible to determine what practices are now in use in Bolivia or w at has been the result of them. In Peru the first changesrecommended and carried out were to level and transplant beds, cull the transplants, and remove the Soil from them before sending them to the field. Later, other recom mendations were followed as far as possible: To pile the logs and branches from the original cover into convenient gullies or to burn them in selected locations, instead of burning them on the planting sites; to plant only on gentle slopes and the t0ps of ridges, where good friable soil occurs; and to abandon the hueco. Method of planting and to plant the trees with the root system in the topsoil layers, with a slight mound around each tree. Study plots of about one-half acre each have been laid off in each of the following parts of the plantation: 1) Where, in 1943, the hueco method of planting had been used; (2) where, in 1944, the first bare rooted and selected transplants had been set, with some modification in the planting method, principally in the nursery; and (3) where, in 1945, the trees had been planted according to full recommendations as finally recommended. Losses in plots from the'first part are now 75 percent; from the second, 24 percent; and from the third, just under 20 percent. Of the 20-percent loss in, the last-named area, 15 percent occurred at or soon after planting. Selections made for disease resistance show promise, but until they are clonally propagated and proved under all con ditions they cannot b'e'consi'dered to be posi tive in their resistance. 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.