Excerpt from Soil Treatments for Winter Wheat: A Summary of Field ExperimentsRock phosphate. Finely ground rock phosphate was applied once during the rotation, usually at wheat seeding time, at the annual acre-rate of 500 pounds. Applications ceased after a total of 4 tons an acre had been applied. Only a small amount of rock phosphate has been applied since 1924.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.