References
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- Hoag , B.K. and Geiszler , G.N. 1970 . Crambe as a potential crop for western North Dakota . North Dakota Farm Research , 27 : 16 – 18 .
- Soine , D.C. 1970 . Fertilizer trials on sunflowers, yellow mustard, crambe , Minnesota Soil Series 87 St. Paul, MN : University of Minnesota .
- Cihacek , L.J. and Gonzales , P.B. February 1991 . “ Soil fertility management for crambe production in North Dakota ” . In Alternative Crop and Alternative Crop Production Research. A progress report , Edited by: Gardner , J. February , 54 – 55 . Fargo, ND : North Dakota State University . 1991
- Gonzales , P.B. and Cihacek , L.J. February 1992 . “ Soil fertility management for crambe production in North Dakota ” . In Alternative Crop and Alternative Crop Production Research. A progress report , Edited by: Gardner , J. February , 34 – 36 . Fargo, ND : North Dakota State University . 1992
- Havlin , J.L. and Soltanpour , P.N. 1980 . A nitric acid plant tissue digest method for use with inductively coupled plasma spectrometry . Commun. Soil Sci. Plant Anal. , 11 (10) : 969 – 980 .
- SAS Institute, Inc. 1985 . SAS User's Guide: Statistics. , Version 5 edition Cary, NC
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