Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-09T07:19:15.873Z Has data issue: false hasContentIssue false
  • English
  • Français

Some Quantitative Aspects of Weed Competition in Vegetable Crops

Published online by Cambridge University Press:  12 June 2017

C. A. Shadbolt  and
L. G. Holm
C. A. Shadbolt
Affiliation:
Horticulture, Univ. of Wisconsin, now Jr. Olericulturist, Dept. Vegetable Crops, Univ. of California, Riverside, California
L. G. Holm
Affiliation:
Univ. of Wisconsin, Madison, Wisconsin
Get access

Extract

The tremendous losses brought about by the presence of weeds in agricultural crops have been much underrated in the past. Recently it has been estimated, probably conservatively, that the total losses to agricultural producers in the United States approaches four billion dollars annually (18). Unless the basic causes of these losses and the places in which they occur can be determined, their significance cannot be fully evaluated.

Type
Research Article
Information
Weeds , Volume 4 , Issue 2 , April 1956 , pp. 111 - 123
Copyright
Copyright © 1956 Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Blackman, G. E. An analysis of the seasonal light intensity and temperature on the growth of plants in the vegetative phase. Rpt. of the Thirteenth Int'l. Hort. Congress. Pp. 794–800. 1952.Google Scholar
2. Blackman, G. E., and Templeman, W. G. The interaction of light intensity and nitrogen supply in growth and metabolism of grasses and clover, (Trifolium repens). 4. The relationship of light intensity and nitrogen supply to the protein metabolism of the leaves of grasses. Ann. Bot. 4:533–587. 1940.CrossRefGoogle Scholar
3. Blaser, R. E., and Brady, N. C. Grasses and weeds—the potash robbers. Crops and Soils. 37:(2). 1953.Google Scholar
4. Bula, R. J., Smith, D., and Miller, E. E. Measurements of light beneath a small grain companion crop as related to legume establishment. Bot. Gaz. 115:271–278. 1954.CrossRefGoogle Scholar
5. Clements, F. E. Factors in elongation and expansion under reduced light intensities. Pl. Phys. 9:767–781. 1934.CrossRefGoogle Scholar
6. Christopher, E. P. The intensity of light striking leaves of apple trees at different times of day. Proc. Amer. Soc. Hort. Sci. 32:86–92. 1934.Google Scholar
7. Heath, O. V. S., and Holdsworth, M. Morphogenic factors as exemplified by the onion plant. Symposium. Soc. for Exp. Biol. 2:326–350. 1948.Google Scholar
8. Mann, H. H., and Barnes, T. W. The competition between barley and certain weeds under controlled conditions. Ann. Appl. Biol. 32:15–22. 1945.CrossRefGoogle Scholar
9. Mann, H. H., and Barnes, T. W. The competition between barley and certain weeds under controlled conditions. II. Competition with Holcus mollis . Ann. Appl. Biol. 34:252–266. 1947.CrossRefGoogle Scholar
10. Mann, H. H., and Barnes, T. W. The competition between barley and certain weeds under controlled conditions. III. Competition with Agrostis gigantea . Ann. Appl. Biol. 36:273–284. 1949.CrossRefGoogle Scholar
11. Mann, H. H., and Barnes, T. W. The competition between barley and certain weeds under controlled conditions. IV. Competition with Stellaria media . Ann. Appl. Biol. 37:139–148. 1950.CrossRefGoogle Scholar
12. Miller, E. E. Averaged measurement of optical transmission. Rev. Sci. Inst. 22:56–57. 1951.CrossRefGoogle Scholar
13. Miller, E. E., Shadbolt, C. A., and Holm, L. G. Use of an optical planimeter for measuring leaf area. In preparation.Google Scholar
14. Pavlychenko, T. K. Quantitative study of the entire root systems of weeds and crop plants under field conditions. Ecology. 18:62–79. 1937.CrossRefGoogle Scholar
15. Pavlychenko, T. K., and Harrington, J. B. Root development of weeds and crops in competition under dry farming. Sci. Agr. 16:151–160. 1935.Google Scholar
16. Popp, H. W. Effect of light intensity on growth of soybeans and its relation to the autocatalyst theory of growth. Bot. Gaz. 82:306–319. 1926.CrossRefGoogle Scholar
17. Porter, A. M. Effects of light intensity on the photosynthetic efficiency of tomato plants. Pl. Phys. 12:225–252. 1937.CrossRefGoogle ScholarPubMed
18. Shaw, B. T. Scope of research in weed control. Proc. North Central Weed Cont. Conf. p. 3. 1953.Google Scholar
19. Shirley, H. L. The influence of light intensity and light quality upon the growth of plants. Amer. J. Bot. 16:354–390. 1929.CrossRefGoogle Scholar
20. Shirley, H. L. Light as an ecological factor and its measurement. Bot. Rev. 11:497–532. 1945.CrossRefGoogle Scholar
21. Stahler, L. M. Shade and soil moisture as factors in competition between selected crops and field bindweed, Convolvulus arvensis . Jour. Amer. Soc. Agron. 40:490–502. 1948.CrossRefGoogle Scholar
22. Thomas, D., and Hill, G. R. The continuous measurement of photosynthesis, respiration and transpiration of alfalfa and wheat growing under field conditions. Pl. Phys. 12:285–307. 1937.CrossRefGoogle ScholarPubMed