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Effects of Spent Mushroom Substrate Weathering on the Chemistry of Underlying Soils

Department of Agronomy, The Pennsylvania State Univ., University Park, PA 16802

View larger version (29K): [in a new window]   Fig. 1. The pH profiles of soils influenced by spent mushroom substrate weathering (soil to solution = 1:1). Measurements made in 1 M KCl and in deionized water are compared. Depth represents the distance from the surface to the middle point of each genetic horizon. Error bars represent 95% confidence intervals of the triplicate means.

View larger version (18K): [in a new window]   Fig. 2. Electrical conductivity profiles (soil to water = 1:5) of soils as influenced by spent mushroom substrate weathering. Error bars represent 95% confidence intervals of the triplicate means.

View larger version (19K): [in a new window]   Fig. 3. Total organic carbon profiles of soils influenced by spent mushroom substrate weathering. Error bars represent 95% confidence intervals of the triplicate means.

View larger version (17K): [in a new window]   Fig. 4. Water-soluble organic carbon profiles of soils as influenced by spent mushroom substrate weathering. Error bars represent 95% confidence intervals of the triplicate means.

View larger version (22K): [in a new window]   Fig. 5. Water-soluble anion and cation profiles in soils influenced by spent mushroom substrate weathering. Error bars represent 95% confidence intervals of the triplicate means.

View larger version (14K): [in a new window]   Fig. 6. Exchangeable cation profiles in soils influenced by spent mushroom substrate weathering. Error bars represent 95% confidence intervals of the triplicate means.