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Statistics on Fertilizers and Liming Materials in the United States
註釋In this bulletin an attempt is made to bring together in one place comprehensive statistics of fertilizer production, consumption, foreign trade, and kindred topics, as they relate to the United States . Also included are data on agricultural liming materials , gypsum, and peat. This compilation should serve, among other things, as an aid in charting the progress in the several phases of the subject; in evaluating national, regional, and State trends in the use of fertilizers and related materials; in forecasting their requirements for future use; in developing programs for expanding their production with respect to quantities and types of products and to plant location; in studies of the economics of their use in relation to farm income, crop production, and land-management practices; and in guiding their allocation in time of emergency.