Studies on the weeds of vegetable crops. 6. Seed populations of soil under commercial cropping.

Published online
06 Mar 1966
Content type
Journal article
Journal title
Journal of Applied Ecology

Roberts, H. A. & Stokes, F. G.

Publication language


The weed seed populations built up in the top 6 in. of soil in land on which vegetable crops have been grown for long periods, was estimated from soil samples obtained during the winters of 1958-62, from 58 fields distributed in 23 English counties. The numbers of seeds found ranged from 6.6 to 348 millions/ac and half the fields had seed populations within the range 25-90 million Fewer than 20 million seedswere found in only 10 of the 58 fields sampled. Although seeds of more than 70 species were encountered, 7 species, Poa annua, Urtica urens, Senecio vulgaris, Stellaria media, Capsella bursa-pastoris, Chenopodium album and Veronica persica together accounted for approximately 80% of all the seeds recorded. The prevalence of these species appears to be associated with the frequent cultivations involved in the production of vegetable crops.-M.Y.

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