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- [1] LABORATORY PENETROMETER FOR MEASUREMENT OF STRENGTH OF SOIL CLODS JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 1977, 22 (01): : 85 - 91
- [6] FLOTATION METHOD FOR RAPID MEASUREMENT OF WET BULK DENSITY OF SOIL CLODS JOURNAL OF SOIL SCIENCE, 1973, 24 (02): : 239 - 243