共 5 条
[1]
CAMPBELL DJ, 1982, 9TH P C INT SOIL TIL, P189
[2]
DICKSON JW, 1983, J AGR ENG RES, V28
[3]
HENSHALL JK, 1982, SIN345 SCOTT I AGR E
[4]
SPATIAL-RESOLUTION AND CALIBRATION CHARACTERISTICS OF 2 NARROW PROBE GAMMA-RAY TRANSMISSION-SYSTEMS FOR THE MEASUREMENT OF SOIL BULK-DENSITY INSITU
[J].
JOURNAL OF SOIL SCIENCE,
1979, 30 (03)
:517-528
[5]
HAND-HELD GAMMA-RAY TRANSMISSION EQUIPMENT FOR MEASUREMENT OF BULK DENSITY OF FIELD SOILS
[J].
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH,
1971, 16 (02)
:146-+