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The influence of tillage on the weed flora in a succession of winter wheat crops on a clay loam soil and a silt loam soil
Author(s) -
POLLARD F.,
MOSS S.R.,
CUSSANS G.W.,
FROUDWILLIAMS R.J.
Publication year - 1982
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1982.tb00155.x
Subject(s) - loam , agronomy , tillage , avena fatua , plough , weed , environmental science , biology , soil water , soil science
Summary Weed populations were monitored for 4 years on two experiments designed to compare the effect of different primary tillage treatments on winter wheat ( Triticum aestivum L.) cropping. Ploughing was compared with deep and shallow tine cultivation and with no tillage on both a clay loam and a silt loam over chalk. Soil‐acting residual herbicides were used to control weeds, especially Alopecurus myosuroides Huds. and Avena fatua L. Dicotyledonous weeds were uncommon on the clay loam but on the silt loam, in a year when no residual herbicide was used, they were most numerous where the soil was disturbed most. In other years there was little difference in the number emerging. Six species were reduced in number by reduced cultivation or no tillage, whilst four species, including two grasses, were increased. At both sites, A. myosuroides was more numerous on direct drilled and tine cultivated plots than on ploughed. Herbicides gave good control on the silt loam but failed to control the weed on the clay loam. On the clay loam, A. fatua was most numerous on tine cultivated plots and a combination of herbicides and roguing produced a decline in the population.