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Compaction and Subsoiling Effects on Corn Growth and Soil Bulk Density

Postal Code 21110, P.O. Box 422, Irbid, Jordan

View larger version (14K): [in a new window]   Fig. 1. Root indices (N) as influenced by root count and size (From Ngunjiri and Siemens, 1993). Root density (g cm-3) = (0.029 + 0.047 N + 0.011 N2)/Volume.

View larger version (20K): [in a new window]   Fig. 2. Root density relative to crop row in the 0-, 8-, and 19-Mg axle load plots.

View larger version (47K): [in a new window]   Fig. 3. Effects of soil compaction and subsoiling on corn yield. Letters a–e indicate the statistical difference within a year at the 0.1 probability level.

View larger version (46K): [in a new window]   Fig. 4. Effects of soil compaction and subsoiling on soil bulk density. Letters a–f indicate the statistical difference within a depth range at the 0.1 probability level.