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The Effects of Soil Carbon on Phosphorus and Sediment Loss from Soil Trays by Overland Flow

^a AgResearch Ltd., Invermay Agricultural Centre, Private Bag 50034, Mosgiel, New Zealand
^b Pasture Systems and Watershed Management Research Unit, Curtin Road, University Park, PA 16802-3702

View larger version (24K): [in a new window]   Fig. 1. Relationship between mean soil labile carbohydrate and the mean total load of sediment lost.

View larger version (14K): [in a new window]   Fig. 2. Variation of the mean of P fractions for poultry-manured soils (50 kg P ha-1) with time since the onset of flow.

View larger version (18K): [in a new window]   Fig. 3. Variation of the ß parameter (nonsignificant parameters excluded) for the power function fit of mean dissolved reactive phosphorus (DRP; top) and total phosphorus (TP; bottom) concentration with time against mean labile carbohydrate.

View larger version (22K): [in a new window]   Fig. 4. Variation of the mean percentage decrease of total phosphorus (TP) with time since the onset of flow.