Characterization of the iron status in plant parts and its relation to soil pH on acid soils
1992
Gupta, U.C.
This study was conducted in Prince Edward Island, Canada, to characterize the Fe status of various plant parts in a number of crops and to determine the relationship of plant Fe concentration to soil pH. The highest amounts of Fe in plant tissue were found in potatoes, carrots, broccoli, soybeans and in the lower leaves of tobacco. Timothy grass, cereal grain and boot stage tissue contained the least amounts of Fe. In most cases, the leaves consistently contained the highest and the stems the lowest Fe. The Fe concentration in tobacco leaves increased almost six-fold from the young tip leaves to the bottom sand leaves. Iron concentration in the various grains varied considerably whereby the soybean kernels contained about three times more Fe than the cereal kernels. In most cases, the relationship between the Fe concentration in eight plant species vs soil pH was not significant over the soil pH range of 5.1 to 7.0. Only wheat and carrots showed significant r values of +0.81 and r = -0.69, respectively.
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