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Water-Budget Evaluation of Prairie and Maize Ecosystems

^a Dep. of Soil Science, Univ. of Wisconsin, 1525 Observatory Dr., Madison, WI 53706-1299 USA
^b Dep. of Forest Ecol. and Manage., Univ. of Wisconsin, Madison, WI 53706 USA

View larger version (23K): [in a new window]   Fig. 1 Plot diagram and lysimeter placement for agricultural and prairie sites. The prairie site is 2.5 km NE of the agricultural site

View larger version (24K): [in a new window]   Fig. 2 Cumulative evapotranspiration calculated by residual difference for the 132-wk water-balance period for the prairie and agroecosystems

View larger version (24K): [in a new window]   Fig. 3 Cumulative measured equilibrium-tension lysimeter drainage for the 132-wk water-balance period for the prairie and agroecosystems

View larger version (36K): [in a new window]   Fig. 4 Cumulative measured soil water–storage changes for the 132-wk water-balance period for the prairie and agroecosystems

View larger version (29K): [in a new window]   Fig. 5 Soil-profile water contents sectioned between 0–0.7 m and 0.8–1.4 m for the prairie and agroecosystems

View larger version (28K): [in a new window]   Fig. 6 Goose Pond prairie 132-wk water balance with individual weekly precipitation bars; denotes significant runoff episodes

View larger version (28K): [in a new window]   Fig. 7 No-tillage agroecosystem's 132-wk water balance with individual weekly precipitation bars; denotes significant runoff episodes

View larger version (28K): [in a new window]   Fig. 8 Chisel-plow agroecosystem's 132-wk water balance with individual weekly precipitation bars; denotes significant runoff episodes

View larger version (18K): [in a new window]   Fig. 9 Relationship between years of mechanical disturbance by cultivation and the drainage fractions (exponentially decreasing) and evapotranspiration fractions (linear with small slope) of annual precipitation for the prairie and agroecosystems