Browsing by Author "Helgeson, E. A."
Now showing items 1-16 of 16
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Chemical Control of Brush and Shrubs
Widdifield, R. B.; Helgeson, E. A.; Widdifield, R. B.; Helgeson, E. A. (North Dakota State University, 1956) -
Chemical Control of Perennial Weeds
Widdifield, R. B.; Helgeson, E. A.; Widdifield, R. B.; Helgeson, E. A. (North Dakota State University, 1953) -
Chemical Weed Control in field crops and for perennial weeds
Jensen, L. A.; Nalewaja, John; Helgeson, E. A.; Jensen, L. A.; Nalewaja, John; Helgeson, E. A. (North Dakota State University, 1963) -
Chemical Weed Control in field crops and for perennial weeds
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1962) -
Chemical Weed Control in growing crops
Helgeson, E. A.; Widdifield, R. B.; Helgeson, E. A.; Widdifield, R. B. (North Dakota State University, 1953) -
Chemical Weed Control in North Dakota Field Crops
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1957) -
Chemical Weed Control in North Dakota Field Crops
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1960) -
Chemical Weed Control in North Dakota Field Crops
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1958) -
Chemical Weed Control in North Dakota Field Crops
Widdifield, R. B.; Helgeson, E. A.; Widdifield, R. B.; Helgeson, E. A. (North Dakota State University, 1956) -
Chemical Weed Control in North Dakota Field Crops
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1959) -
Control of Perennial Sow Thistle
Helgeson, E. A.; Helgeson, E. A. (North Dakota State University, 1945) -
Control of Quackgrass
Helgeson, E. A.; Helgeson, E. A. (North Dakota State University, 1945) -
Perennial Weed Control
Jensen, Lars A.; Helgeson, E. A.; Jensen, Lars A.; Helgeson, E. A. (North Dakota State University, 1957) -
Perennial Weed Control
Jensen, L. A.; Helgeson, E. A.; Jensen, L. A.; Helgeson, E. A. (North Dakota State University, 1959) -
Suggestions for Control of Canada Thistle
Helgeson, E. A.; Helgeson, E. A. (North Dakota State University, 1945) -
Weed Control with T.C.A. and M.C.P.
Helgeson, E. A.; Kratochvil, D. E.; Widdifield, R. B.; Helgeson, E. A.; Kratochvil, D. E.; Widdifield, R. B. (North Dakota State University, 1952)