Book Description

Excerpt from Illustrated Lecture on Wheat Culture Wheat requires moisture, air, light, heat, and plant food for its development. Most of these factors are more or less under control. Moisture under certain conditions is regulated by cultivation, drainage, and irrigation. Air is admitted into the soil by means of drainage and tillage. Light has free access to the parts of the plants that require it. The degree of heat necessary for germination and growth is in uenced to a certain extent by the choice of the season for planting and by cultiva tion to reduce evaporation, and plant food is supplied from the quantity of nutritive elements naturally stored in the soil and maintained and replenished by the different methods of soil fertilization and management. The plant body is composed of cells containing during their life a substance called protoplasm, having the remarkable power of changing the foods taken up'by the plant into the substances used in building up the cell wall and at the same time providing for those entering into its own composition. 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."