Manganese, zinc, boron, and iodine in soils of the northwestern part of the Dagestan foothills

The contents and distribution patterns of Mn, Zn, B, and I in the main soil types of the Dagestan foothills are studied. The soils are well provided with Mn and B and are poorly provided with Zn and I. There is a tendency toward an inverse proportion between the contents of water-soluble and total Mn in all the investigated soils. The correlation coefficients between the contents of B, Zn, and I and the humus content are determined. There is no correlation between the contents of humus and Mn or between the contents of the studied microelements and the soil pH.