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- W2027442016 abstract "Dilute formalin was used to sample earthworm populations in a field experiment comparing conventional (CFS) and integrated (IFS) farming systems, at Long Ashton in SW England during 1990–2000. Crops in the CFS were established by ploughing. Those in the IFS treatments were established by non-inversion tillage: in the first 5 yrs using a Dutzi cultivator or by direct drilling (IFS-1); from 1994 onwards using either a Vaderstad cultivator (IFS-2) or a Dutzi cultivator (IFS-3). These treatments had little or no effect on earthworm populations over the first 3 yrs of the experiment, but after this time total earthworm numbers and biomass were generally greater in the IFS treatments than in the CFS. Individual earthworm species (determined from 1995 onwards) differed in their response to the different farming systems. Numbers of Allolobophora chlorotica, Lumbricus festivus, L. rubellus and L. terrestris averaged over all years were significantly greater in IFS-3 than in CFS, with densities in IFS-2 nearly always intermediate and not significantly different from either extreme. Average treatment differences for other species were not significant, although in most years numbers of Aporrectodea longa, Lumbricus castaneus and Octolasion spp. were greatest in IFS-3, with IFS-2 similar to or less than CFS. There were no consistent differences between treatments for Aporrectodea caliginosa and A. rosea. Tillage method and the number of crop establishment passes were probably the main factors affecting earthworm populations, although the abundance and distribution of some species may also have been influenced by the amount of soil organic matter. During the period 1995–2000,13 species of earthworms were recorded from the site with A. caliginosa and Al. chlorotica the dominant species. These and other species which normally live in temporary burrows close to the soil surface formed about 80% of the total earthworms extracted, with the larger deep burrowing species, such as A. longa and L. terrestris, representing <20% of the total catch. Species diversity was consistently greater in the Dutzi-based integrated system (IFS-3) than in either the Vaderstad-based integrated system (IFS-2) or the conventional system (CFS). It is suggested that knowledge of the species composition of earthworm communities is essential in order to properly anticipate the likely impact of modified farming practices on earthworm populations. Careful consideration of the specific machine(s) used for tillage operations may also be required." @default.
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- W2027442016 date "2001-12-01" @default.
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- W2027442016 title "Earthworm populations in conventional and integrated farming systems in the LIFE Project (SW England) in 1990-2000" @default.
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- W2027442016 doi "https://doi.org/10.1111/j.1744-7348.2001.tb00150.x" @default.
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