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- [2] BULK DENSITY OF A FRAGIPAN SOIL IN NATURAL AND DISTURBED PROFILES SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS, 1972, 36 (04): : 686 - +
- [4] Design of multi-segment in situ soil sampler testing bulk density Nongye Gongcheng Xuebao, 2008, 8 (127-130):