Caloric Values of Organic Matter in Woodland, Swamp, and Lake Soils

Abstract
Caloric values were determined on an ash—free dry—weight basis for organic matter in woodland, swamp, and lake soils and in certain plants. Mean values in kilocalories per gram are: 11 woodland soils, 5.04; 20 swamp soils, 4.87; 9 lake sediments, 5.24; 10 tree—leaf samples, 5.22; 9 samples of aboveground parts of the ground flora, 4.65; 4 aquatic algae, 5.23; and 4 aquatic macrophytes, 4.31.

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