فقر مواد غذايي خاك : نگرش اقتصادي بر فرسايش در ايران

Poverty of soil nutrition: An economic views on erosion in Iran

This paper estimated annual changes of soil components and value of it with using of survey data from soil. Results of this study showed that with increasing of slope and soil depth, annual amount of decreasing of soil componets have increased and decreased, respectively. Value of soil components under vertical plow management is less than of parallel plow. Average value of soil components is equal to 174511 rials per hectar. With considering of chemical fertilizer for compensation of loss fertility, value of soil components is equal to 204411 rials per hectare. With regards to this results, determination of fertilizer regime based on plow management, slope, depth and texture of soil, attention to economic effects of erosion on poverty of soil especially on drainage land, payment subsidy to soil conservation practices, transition from annual cultivation system and extension of soil conservation programs as suggestion has introduced.