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I he distribution of native vegetation and the rate of forest growth in relation to soils were studied on two transects. One of the transects extended for about 4 miles in Iowa and Sauk Counties; it crossed the Wisconsin River in a southnorth direction near Arena. The other transect extended for 2 miles in Richland County; it crossed the Pine River in a west-east direction near Hub City. In each floristic type, encountered on the transects, the soil was excavated to a depth of 6 feet, unless rock substratum or the ground water table was found at a shallower depth. The properties of soil profiles were studied in the field and in the laboratory. The composition of vegetation was recorded as to relative abundance and conspicuousness of different species. In forest types, the height, diameter, and age of trees were determined on one-fifth acre plots. The yields per acre were established on the basis of estimated stand density, height of dominant trees, and available yield tables (Gevorkiantz and Scholz, '47). The record of the ground cover plants was supplemented by a number of quadrat studies, confined to the major soil-forest units. The primary purpose of the transect study was to establish a natural basis for forest and farm woodlot management. Geologically the region studied is typical of the unglaciated area of southwestern Wisconsin. It presents sharply dissected cuestas with steep narrow ridges |
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