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Hadas, A., Dept Soil Physics, Inst of Soils & Water, Agricultural Res Organization, Bet Dagan, 50250, Israel.
Wolf, D., Dept Soil Physics, Inst of Soils & Water, Agricultural Res Organization, Bet Dagan, 50250, Israel.
A study was carried out 1) to determine soil clod fragmentation patterns' dependence on specific surface energy, aggregate or clod size, and stress loading rates; and 2) to examine the hypothesis that the large clods produced during tillage operations performed on air-dry soils are a result of soil compaction due to overtilling and machinery traffic on a moist soil during the cropping season. It was found that surface energy and specific energy required to reduce aggregate size are dependent on stress loading rates. It was concluded, based on soil strength values obtained, that the fracture strength of the soils tested is attributed to CaCO3 bonding bridges and is practically uniform for all clod and aggregate size ranges tested. -from AuthorsSoil strength Specific surface energy at fracture Soil structure.
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Soil aggregates and clod strength dependence on size, cultivation, and stress load rates.
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Hadas, A., Dept Soil Physics, Inst of Soils & Water, Agricultural Res Organization, Bet Dagan, 50250, Israel.
Wolf, D., Dept Soil Physics, Inst of Soils & Water, Agricultural Res Organization, Bet Dagan, 50250, Israel.
Soil aggregates and clod strength dependence on size, cultivation, and stress load rates.
A study was carried out 1) to determine soil clod fragmentation patterns' dependence on specific surface energy, aggregate or clod size, and stress loading rates; and 2) to examine the hypothesis that the large clods produced during tillage operations performed on air-dry soils are a result of soil compaction due to overtilling and machinery traffic on a moist soil during the cropping season. It was found that surface energy and specific energy required to reduce aggregate size are dependent on stress loading rates. It was concluded, based on soil strength values obtained, that the fracture strength of the soils tested is attributed to CaCO3 bonding bridges and is practically uniform for all clod and aggregate size ranges tested. -from AuthorsSoil strength Specific surface energy at fracture Soil structure.
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