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采用连续浸提的分析方法进行研究。结果表明，土壤锰主要以残渣态和易还原态存在。分别占全锰的１８．４６～８１．３６％和４．２８～６３．３４％；水旱轮作及冬水田土壤各级形态一般都低于相应旱地土壤，其中尤以易还原性锰含量差异最为显著。土壤铁以残渣态为主，占全铁的９３．１～９８．８％，其次为三二氧化物形态。残渣态铁的相对含量旱地土壤高于水旱轮作土壤，后者又高于冬水田土壤，三二氧化物态，碳酸盐结合态及有机质结合态铁以旱地土壤为低，冬水田土壤最高。土壤有效锰与易还原性锰，三二氧化物结合态锰呈极显著正相关。土壤有效铁与碳酸结合态、三二氧化物形态铁呈极显著、显著正相关。试验表明，旱地土壤易缺铁而不易缺锰，植稻土壤（水旱轮作土壤和冬水田）易缺锰而不易缺铁。
Using continuous extraction of analytical methods to study. The results show that soil manganese mainly exists in the residual state and the easy reduction state. Accounting for 18.46-81.36% and 4.28-63.34% of the total manganese respectively. The soil forms at all levels in the runoff and winter paddy fields were generally lower than those in the corresponding dryland soils, especially the content of easily reducible manganese The most significant. Soil iron residue-based, accounting for 93.1 ~ 98.8% of the total iron, followed by the three dioxide morphology. The relative content of residual iron in dry land was higher than that in dryland and paddy soil, while the latter was higher than that in winter paddy soil. In the dry land, the trioxide state, carbonate bound state and organic matter bound iron were lower, . Soil available Mn was significantly and positively correlated with easily reducible manganese and manganese dioxide. There was a significant and significant positive correlation between soil available iron and carbonate bound species, and ternary iron species. Experiments show that dryland soil easily iron deficiency but not easy to lack manganese, paddy soil (water and drought rotation of soil and winter paddy field) easy to lack of manganese and iron deficiency.