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Short-Term Effects of Land Leveling on Soil Physical Properties and Microbial Biomass

Dep. of Crop, Soil, and Environmental Sciences, Univ. of Arkansas, 115 Plant Sciences Building, Fayetteville, AR 72701

View larger version (106K): [in a new window]   Fig. 1. Pre- and post-leveling spatial distributions of soil bulk density from the 0- to 10-cm depth. The x-direction is North and the y-direction is West on the land surface. Roughly, the eastern one-half of the area was cut and the western one-half of the area was filled.

View larger version (57K): [in a new window]   Fig. 2. Pre- and post-leveling spatial distributions of soil particle-size fractions from the 0- to 10-cm depth. The x-direction is North and the y-direction is West on the land surface. Roughly, the eastern one-half of the area was cut and the western one-half of the area was filled.

View larger version (58K): [in a new window]   Fig. 3. Pre- and post-leveling spatial distributions of soil microbial biomass concentrations from the 0- to 10-cm depth. The x-direction is North and the y-direction is West on the land surface. Roughly, the eastern one-half of the area was cut and the western one-half of the area was filled.

View larger version (59K): [in a new window]   Fig. 4. Pre- and post-leveling spatial distributions of soil microbial biomass contents from the 0- to 10-cm depth. The x-direction is North and the y-direction is West on the land surface. Roughly, the eastern one-half of the area was cut and the western one-half of the area was filled.

View larger version (90K): [in a new window]   Fig. 5. Pre- and post-leveling spatial distributions of soil fungal/bacterial biomass concentration ratios from the 0- to 10-cm depth. The x-direction is North and the y-direction is West on the land surface. Roughly, the eastern one-half of the area was cut and the western one-half of the area was filled.

View larger version (47K): [in a new window]   Fig. 6. Relationships between soil bacterial and fungal biomass concentrations and bulk density and percentages of sand, silt, and clay from the 0- to 10-cm depth for combined pre- and post-leveling data.

View larger version (45K): [in a new window]   Fig. 7. Relationships between soil bacterial and fungal biomass contents and bulk density and percentages of sand, silt, and clay from the 0- to 10-cm depth for combined pre- and post-leveling data.