Soil fertility survey and establishment of a soil fertility unit in Iran.
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This volume describes the background of the Soil Fertility Project in Iran and summarizes the results of a fiveyear period when more than 10,000 experiments were carried out under actual farming conditions in 15 representative areas of the country. It explains the recommendation of fertilizer rates which ensure a high monetary return and a maximum profit. Recommendations are nade for organizing future research on soil fertility, developing a sound economic policy of fertilizer investment, enlarg ing credit facilities for small farmers, and training Iranians for the specialized field Of soil fertility.