Arsenic absorption inhibitors， soil and cultivation methods

The arsenic absorption inhibitor of the present invention is an arsenic absorption inhibitor that suppresses the absorption of arsenic from the soil by mixing with the soil on which the agricultural crop is cultivated， and is a granular material containing iron as a main component and phosphorus and sulfur. ， When the total iron content is [T.Fe] mass% and the metallic iron content is [M.Fe] mass%， the following formula (1) is satisfied. 0[T.Fe]-[M.Fe]3.5 ···(1) The arsenic absorption-inhibiting agent according to the present invention is to be mixed into soil in which an agricultural crop is planted， whereby inhibits the absorption of arsenic by the agricultural crop in this soil. This arsenic absorption inhibitor is a granule having iron as the main component and contains phosphorus and sulfur， and satisfies formula (1) where [T. Fe] mass% denotes the total iron content and [M. Fe] mass% denotes the content of metallic iron: 0 ≤ [T. Fe] - [M. Fe] ≤ 3.5 ... (1). The arsenic absorption-inhibiting agent according to the present invention is to be mixed into soil in which an agricultural crop is planted， whereby inhibits the absorption of arsenic by the agricultural crop in this soil. This arsenic absorption inhibitor is a granule having iron as the main component and contains phosphorus and sulfur， and satisfies formula (1) where [T. Fe] mass% denotes the total iron content and [M. Fe] mass% denotes the content of metallic iron: 0 ≤ [T. Fe] - [M. Fe] ≤ 3.5 ... (1).