Blumberg, A.Y. and Crossley, D.A. Jr. (1983) Comparison of soil surface arthropod populations in conventional tillage, no-tillage and old field systems. Agro-Ecosystems, 8 (3-4). pp. 247-253.
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Abstract
Soil surface arthropod populations under conventional tillage and no-tillage sorghum and in an adjacent old field were compared using pitfall trap captures. Overall diversity and similarity quotients between systems were calculated from each of seven 24-h sampling periods throughout the season. Diversity of the soil surface arthropods was greatest under conventional tillage. Although each system was distinct (any two of the systems had less than 30% of their species in common), no-tillage was most similar to old field and least similar to conventional tillage during a period of drought and after heading of the sorghum. Percentages of individuals and species represented by spiders were similar under no-tillage (30 and 15%) and in the old field (22 and 17%); percentages were substantially less under conventional tillage (11 and 8%). Yields (biomass of sorghum) were not significantly different under conventional and no-tillage despite the generally predicted higher pest populations under no-tillage in the absence of insecticides. Leaf area grazed by insects was greater under conventional tillage (28%) than under no-tillage (12%)
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Entomology and Institute of Ecology, University of Georgia, Athens, GA 30602, USA |
| Subjects: | Soil Science and Microbiology > Soil Sciences |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 22 Nov 2012 07:52 |
| Last Modified: | 22 Nov 2012 07:52 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/8871 |
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