Excerpt from Fertilizer Guide for the West Indies We here have first ammonia 5 per cent. What is ammonia? It is a chemical combination of the elements nitrogen and hydrogen, of which nitrogen alone is of interest to the planter, as hydrogen is not a plant food that needs to be applied, we are therefore not interested in ammonia but in nitrogen. Next we have nitrogen per cent, which is the same thing stated over again, as 5 per cent ammonia is equal to per cent nitrogen and it means that there are pounds of pure nitrogen in every 100 pounds of the fertilizer or per pounds, or pounds per ton. 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.