Tillage and weed management effects on forage production in a barley-red clover rotation

Légère, Anne; Stevenson, F. Craig; Samson, Nathalie

doi:10.4141/p00-169

Cited by 4 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tillage and seeding implements used in the CP and NT treatments on this gravelly-sandy loam only allowed proper crop establishment and adequate weed control under a very narrow range of environmental conditions. Red clover yields in NT treatments at the clay site were reduced in 3 of 7 yr, likely because of poor red clover establishment and growth in NT treatments due to environmental conditions (Légère et al 2001b). Red clover stands generally benefitted from intensive weed management applied in the previous barley crop.…”

Section: Synopsis Of Resultsmentioning

confidence: 99%

Symposium Tillage and weed management effects on weeds in barley–red clover cropping systems

Légère

Samson²

2004

Weed Science

Self Cite

View full text Add to dashboard Cite

The main study objective was to measure the effects of tillage (moldboard plow, chisel plow, and no-till) and weed management (intensive, moderate, and minimum) on weeds and crops in a spring barley monoculture compared with a spring barley–red clover rotation. The study was initiated in 1987 and conducted at two sites. Residual effects of treatments were measured in a wheat test crop at the loam site in 1994 and at the clay site in 1995–1996. Weed seed bank densities ranged from less than 300 to nearly 30,000 seeds m−2 and plant densities from 30 to 6,000 plants m−2. Seven species were recorded on average per plot aboveground and 10 species per plot in the seed bank. Species number in the seed bank varied little with treatments compared with species numbers aboveground. Crop rotation and tillage had little effect on weed species diversity but affected relative species dominance. The presence and abundance of species was also influenced by their degree of tolerance to the herbicides used in each system. Annual dicots largely dominated in minimum weed management treatments. Their relative importance in each rotation varied with their level of susceptibility to the different postemergence herbicides. Perennials were not exclusively found in reduced tillage systems. The relationship between perennials and tillage was dependent on the response of perennating structures to the type and frequency of soil disturbance. For example, quackgrass dominated in chisel and moldboard plow systems where rhizomes would be frequently fragmented. Field horsetail, also a rhizomatous species, dominated in the monoculture/direct-seeded no-till treatment under minimum weed management. Its absence from the rotation was explained by the regular removal of aboveground biomass during the forage production year. Overall, weed response was regulated by agronomic factors but was largely determined by specific biological attributes and environmental conditions.

show abstract

Section: Synopsis Of Resultsmentioning

confidence: 99%

Symposium Tillage and weed management effects on weeds in barley–red clover cropping systems

Légère

Samson²

2004

Weed Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…1989-1992 1999). Also, poor forage establishment and production in 3 out of 7 yr in the NT compared with the tilled systems (Légère et al 2001) may have lessened the immediate and residual environmental benefits (e.g., N fixation) compared with tilled systems, thus reducing the potential for optimum cereal growth and competitiveness. Residual benefits of previous weed management were observed for wheat yields, particularly in NT treatments, and generally increased with weed management intensity.…”

Section: Discussionmentioning

confidence: 99%

“…The first phase of the barley-red clover rotation included barley underseeded with red clover, and the second phase included one season of red clover forage production, with each phase present in a given year. Red clover was harvested twice in the forage production year (Légère et al 2001). Tillage treatments, assigned to subplots, included moldboard plow (MP), chisel plow (CP), and no tillage (NT).…”

Section: General Field Proceduresmentioning

confidence: 99%

Residual effects of crop rotation and weed management on a wheat test crop and weeds

Légère¹,

Stevenson²

2002

Weed Science

Self Cite

View full text Add to dashboard Cite

Crop rotations, particularly those that include legumes, often result in improved soil quality and crop yields. A study was conducted to confirm the presence and persistence of the residual effects of crop rotation and weed management on a test crop and weeds in three tillage systems (moldboard plow [MP]; chisel plow [CP]; no tillage [NT]). Rotation (spring barley monoculture and spring barley–red clover rotation) and weed management (intensive, moderate, minimum) treatments, initiated in 1987, were terminated, and a test crop of spring wheat was grown in 1995 and 1996. Tillage treatments were maintained throughout. Multivariate analysis showed that weed communities were more affected by treatment termination in the rotation NT treatment with minimum weed management than in all other treatments. The former treatment was dominated by perennial broadleaf weeds but sustained adequate wheat yields (3.3 Mg ha−1) compared with the monoculture (1.0 Mg ha−1) one year after termination. Weed communities in CP and MP plots were less affected by treatment termination. Yet, changes in herbicide use at termination caused the virtual elimination of quackgrass from tilled plots and allowed field pennycress to become ubiquitous across treatments. Residual effects from crop rotation were more important than those from weed management in increasing wheat yields in tilled systems. Differences in wheat yield in NT systems 2 yr after treatment termination were attributed to residual effects from previous weed management rather than from crop rotation. Beneficial effects of crop rotation and weed management may persist for 2 yr but will vary according to tillage system.

show abstract

Winter Wheat and Red Clover Intercrop Response to Tillage and Compost Amendment

2012

View full text Add to dashboard Cite

Frost‐seeding red clover (Trifolium pratense L.) into winter cereals is an efficient establishment method, although performance under contrasting soil management practices remains unclear. Wheat and intercropped red clover productivity were evaluated in intensive tillage (IT), moderate tillage (MT), and no tillage (NT) with and without compost amendment in a corn (Zea mays L.)–soybean [Glycine max (L.) Merr.]–winter wheat (Triticum aestivum L.) and red clover rotation between 2005 and 2010. Wheat yields were not affected by tillage system and averaged 3.80 Mg ha−1 but were 10% higher in compost amended soil compared to no compost. Red clover plant density and dry matter (DM) at cereal grain harvest averaged 127 plants m−2 and 32 g m−2 and were not affected by tillage or amendment treatments. Maximum wheat canopy light interception was attained in late May to early June and ranged from 84 to 91% and typically exceeded 77% light interception for at least 22 d. Red clover root DM increased on average 378% between wheat harvest and 40 d after harvest compared with a 64% average increase in red clover root length. Red clover shoot:root averaged 8.5 at wheat harvest compared with 11.2 40 d after wheat harvest. Producers using this wheat and red clover intercrop should expect no difference in wheat yield or red clover productivity when using IT, MT, or NT.

show abstract

Tillage and weed management effects on forage production in a barley-red clover rotation

Cited by 4 publications

References 17 publications

Symposium Tillage and weed management effects on weeds in barley–red clover cropping systems

Symposium Tillage and weed management effects on weeds in barley–red clover cropping systems

Residual effects of crop rotation and weed management on a wheat test crop and weeds

Winter Wheat and Red Clover Intercrop Response to Tillage and Compost Amendment

Contact Info

Product

Resources

About