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- Title
Effect of canopy cover, seeding depth, and soil moisture on emergence of Centaurea maculosa and C. diffusa.
- Authors
Spears, B. M.; Rose, S. T.; Belles, W. S.
- Abstract
The effects of canopy cover, seeding depth, and soil moisture on emergence of <em>Centaurea maculosa</em> Lam. and <em>C. diffusa</em> Lam. were studied. Canopy cover had no effect on emergence rate (seedlings/day/100 seeds) of either species. Seeds of both species emerged faster when placed on the soil surface. Emergence rate decreased as seeding depth increased. Both species required more than 55% initial soil moisture to initiate emergence, with 65-70% being optimum. Percentage emergence followed exactly the same trend as emergence rate. <em>C. maculosa</em> had better emergence characteristics over a wider range of conditions than <em>C. diffusa</em>, possibly being some of the reasons for the former having a wider geographical distribution in the United States and Canada.
- Subjects
SPOTTED knapweed; DIFFUSE knapweed; PLANT canopies; SOIL moisture; SOWING
- Publication
Weed Research, 1980, Vol 20, Issue 2, p87
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1980.tb00049.x