References
- Anderson , G. , Pridgeon , J.D. , Spencer , H.B. and Parks , R. 1980 . A new hand‐held recording penetrometer for soil studies . J. Soil Sci. , 31 : 279 – 296 .
- ASAE . 1984 . “ ASAE standard: ASAE S‐313. Soil core penetrometer ” . In Agric. Engr. Yearbook , 233 St. Joseph , MI : American Society of Agricultural Engineers .
- Goodman , D. and Rowse , H.R. 1984 . A combined penetrometer and surface relief meter for studying drill coulter performance . J. Soil Sci. , 35 : 497 – 503 .
- Hendrick , J.G. 1969 . Recording soil penetrometer . J. Agric. Eng. Res. , 14 : 183 – 186 .
- Hooks , C.L. and Jansen , I.J. 1986 . Recording cone penetrometer developed in reclamation research . Soil Sci. Soc. Am. J. , 50 : 10 – 12 .
- Howson , D.F. 1977 . A recording cone penetrometer for measuring soil resistance . J. Agric. Eng. Rec. , 22 : 209 – 212 .
- Lowery , B. 1986 . A portable constant‐rate cone penetrometer . Soil Sci. Soc. Am. J. , 50 : 412 – 414 .
- Perumpral , J.V. Cone penetrometer application—A review . 1983 Winter Meetings of the American Society of Agricultural Engineers . Dec. 13–16 1983 . Chicago , IL : ASAE . Fiche No. 83–1549
- Smith , L.S. and Dumas , W.T. 1978 . A recording soil penetrometer . Trans. ASAE , 21 : 12 – 14 .
- Williford , J.R. , Wooten , O.B. and Fulgham , F.E. 1972 . Tractor mounted field penetrometer . Trans. ASAE , 15 : 226 – 227 .
- Contribution 92–532‐J, Kansas Agricultural Experiment Station, Manhattan, KS 66506. Product and company names are included for the benefit of the reader and do not imply any endorsement or preferential treatment by Kansas State University.
- Corresponding author.