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Timing of Tillage as a Driver of Weed Communities

  • Stéphane Cordeau (a1), Richard G. Smith (a2), Eric R. Gallandt (a3), Bryan Brown (a3), Paul Salon (a4), Antonio DiTommaso (a5) and Matthew R. Ryan (a5)...


Tillage is a foundational management practice in many cropping systems. Although effective at reducing weed populations and preparing a crop seedbed, tillage and cultivation can also dramatically alter weed community composition. We examined the impact of soil tillage timing on weed community structure at four sites across the northeastern United States. Soil was tilled every 2 wk throughout the growing season (late April to late September 2013), and weed seedling density was quantified by species 6 wk after each tillage event. We used a randomized complete block design with four replicates for each tillage-timing treatment; a total of 196 plots were sampled. The timing of tillage was an important factor in shaping weed community composition and structure at all sites. We identified three main periods of tillage timing that resulted in similar communities. Across all sites, total weed density tended to be greatest and weed evenness tended to be lowest when soils were tilled early in the growing season. From the earliest to latest group of timings, total abundance decreased on average from 428±393 to 159±189 plants m−2, and evenness increased from 0.53±0.25 to 0.72±0.20. The effect of tillage timing on weed species richness varied by site. Our results show that tillage timing affects weed community structure, suggesting that farmers can manage weed communities and the potential for weed interference by adjusting the timing of their tillage and cropping practices.

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Associate Editor for this paper: John L. Lindquist, University of Nebraska.



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Alatalo, RV (1981) Problems in the measurement of evenness in ecology. Oikos 37:199204
Alvarado, V, Bradford, KJ (2002) A hydrothermal time model explains the cardinal temperatures for seed germination. Plant Cell Environ 25:10611069
Anderson, MJ (2001) A new method for non-parametric multivariate analysis of variance. Austral Ecol 26:3246
Bates, D, Mächler, M, Bolker, B, Walker, S (2015) Fitting linear mixed-effects models using {lme4}. J Stat Softw 67:148
Benech-Arnold, RL, Sanchez, RA, Forcella, F, Kruk, BC, Ghersa, CM (2000) Environmental control of dormancy in weed seed banks in soil. Field Crops Res 67:105122
Booth, BD, Swanton, CJ (2002) Assembly theory applied to weed communities. Weed Sci 50:213
Buhler, DD, Gunsolus, JL, Ralston, DF (1992) Integrated weed management techniques to reduce herbicide inputs in soybean. Agron J 84:973978
Cardina, J, Regnier, E, Harrison, K (1991) Long-term tillage effects on seed banks in three Ohio soils. Weed Sci 39:186194
Clements, DR, Benott, DL, Murphy, SD, Swanton, CJ (1996) Tillage effects on weed seed return and seedbank composition. Weed Sci 44:314322
Crawley, M (2004) Timing of disturbance and coexistence in a species-rich ruderal plant community. Ecology 85:32773288
De Mendiburu, F (2014) Agricolae: Statistical Procedures for Agricultural Research. R Package v. 1.2-4. Accessed: May 12, 2016
de Vries, A, Ripley, B (2013) ggdendro: Tools for Extracting Dendrogram and Tree Diagram Plot Data for Use with ggplot. Accessed: May 12, 2016
Dufrene, M, Legendre, P (1997) Species assemblages and indicator species: the need for a flexible asymmetrical approach. Ecol Monogr 67:345366
Egley, GH, Williams, RD (1991) Emergence periodicity of six summer annual weed species. Weed Sci 39:595600
Forcella, F, Wilson, RG, Dekker, J, Kremer, RJ, John, C, Randy, LA, Alm, D, Karen, AR, Harvey, RG, Sharon, C, Buhler, DD (1997) Weed seed bank emergence across the Corn Belt. Weed Sci 45:6776
Fox, J, Weisberg, S (2011) An {R} Companion to Applied Regression. 2nd edn. Thousand Oaks, CA: Sage. Accessed: May 12, 2016
Ganie, ZA, Sandell, LD, Jugulam, M, Kruger, GR, Marx, DB, Jhala, AJ (2016) Integrated management of glyphosate-resistant giant ragweed (Ambrosia trifida) with tillage and herbicides in soybean. Weed Technol 30:4556
Gardarin, A, Colbach, N, Dürr, C (2010) Effects of seed depth and soil aggregates on the emergence of weeds with contrasting seed traits. Weed Res 50:91101
Gardarin, A, Dürr, C, Colbach, N (2009) Which model species for weed seedbank and emergence studies? A review. Weed Res 49:117130
Grundy, AC, Mead, A (2000) Modeling weed emergence as a function of meteorological records. Weed Sci 48:594603
Guillemin, JP, Gardarin, A, Granger, S, Reibel, C, Munier-Jolain, N, Colbach, N (2013) Assessing potential germination period of weeds with base temperatures and base water potentials. Weed Res 53:7687
Hald, AB (1999) The impact of changing the season in which cereals are sown on the diversity of the weed flora in rotation fields in Denmark. J Appl Ecol 36:2432
Hothorn, T, Bretz, F, Westfall, P (2008) Simultaneous inference in general parametric models. Biometrical J 50:346363
Hurka, H, Benneweg, M (1979) Patterns of seed size variations in populations of the common weed Capsella bursa-pastoris (Brassicaceae). Biol Zentbl 98:699709
Kremen, C, Miles, A (2012) Ecosystem services in biologically diversified versus conventional farming systems: benefits, externalities, and trade-offs. Ecol Soc 17:40
Le, S, Josse, J, Husson, F (2008) FactoMineR: an R package for multivariate analysis. J Stat Softw 25:118
Myers, MW, Curran, WS, VanGessel, MJ, Calvin, DD, Mortensen, DA, Majek, BA, Karsten, HD, Roth, GW (2004) Predicting weed emergence for eight annual species in the northeastern United States. Weed Sci 52:913919
Norris, R, Kogan, M (2005) Ecology of interactions between weeds and arthropods. Annu Rev Entomol 50:479503
Norsworthy, JK, Ward, SM, Shaw, DR, Llewellyn, RS, Nichols, RL, Webster, TM, Bradley, KW, Frisvold, G, Powles, SB, Burgos, NR (2012) Reducing the risks of herbicide resistance: best management practices and recommendations. Weed Sci 60:3162
Oksanen, J, Blanchet, FG, Kindt, R, Legendre, P, O’Hara, RB, Simpson, GL, Solymos, P, Stevens, MHH, Wagner, H (2010) Vegan: Community Ecology Package. R Package v. 1:17–2. Accessed: May 12, 2016
Pekrun, C, Claupein, W (2006) The implication of stubble tillage for weed population dynamics in organic farming. Weed Res 46:414423
Price, AJ, Monks, CD, Culpepper, AS, Duzy, LM, Kelton, JA, Marshall, MW, Steckel, LE, Sosnoskie, LM, Nichols, RL (2016) High-residue cover crops alone or with strategic tillage to manage glyphosate-resistant Palmer amaranth (Amaranthus palmeri) in southeastern cotton (Gossypium hirsutum). J Soil Water Conserv 71:111
Radosevich, SR, Holt, JS, Ghersa, CM (2007) Ecology of Weeds and Invasive Plants: Relationship to Agriculture and Natural Resource Management. 3rd edn. Hoboken, NJ: John Wiley and Sons. 472 p
Rasmussen, IA (2004) The effect of sowing date, stale seedbed, row width and mechanical weed control on weeds and yields of organic winter wheat. Weed Res 44:1220
R Core Team (2015) R: A Language and Environment for Statistical Computing. Vienna, Austria: R Foundation for Statistical Computing
Roberts, HA, Feast, PM (1970) Seasonal distribution of emergence in some annual weeds. Exp Hort 21:3641
Routledge, R (1980) Bias in estimating the diversity of large, uncensused communities. Ecology 61:276281
Ryan, MR, Smith, RG, Mirsky, SB, Mortensen, DA, Seidel, R (2010) Management filters and species traits: weed community assembly in long-term organic and conventional systems. Weed Sci 58:265277
Schutte, BJ, Tomasek, BJ, Davis, AS, Andersson, L, Benoit, DL, Cirujeda, A, Dekker, J, Forcella, F, Gonzalez-Andujar, JL, Graziani, F, Murdoch, AJ, Neve, P, Rasmussen, IA, Sera, B, Salonen, J, Tei, F, Tørresen, KS, Urbano, JM (2014) An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance. Weed Res 54:112
Smith, RG (2006) Timing of tillage is an important filter on the assembly of weed communities. Weed Sci 54:705712
Smith, RG, Ryan, MR, Menalled, FD (2011) Direct and indirect impacts of weed management practices on soil quality. Pages 275286 in Hatfield JL, Sauer TJ, eds. Soil Management: Building a Stable Base for Agriculture. Madison, WI: Soil Science Society of America
Soule, J, Carré, D, Jackson, W (1990) Ecological impact of modern agriculture. Pages 165188 in Carroll C, Vandermeer J, Rosset P, eds. Agroecology. New York: McGraw-Hill
Stirling, G, Wilsey, B (2001) Empirical relationships between species richness, evenness, and proportional diversity. Am Nat 158:286299
Stoller, EW, Wax, LM (1973) Periodicity of germination and emergence of some annual weeds. Weed Sci 21:574580
Swanton, CJ, Weise, SF (1991) Integrated weed management—the rationale and approach. Weed Technol 5:657663
Wickham, H (2009). ggplot2: elegant graphics for data analysis. New York: Springer. 213 p



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