The effect of N placement on grass weeds and winter wheat responses in three tillage systems

Cochran, V. L.; Morrow, Larry A.; Schirman, Roland

doi:10.1016/0167-1987(90)90119-x

Cited by 34 publications

(32 citation statements)

References 8 publications

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“…Banding compared with broadcasting N on the soil surface can reduce the competitive ability of annual weeds such as downy brome (Rasmussen 1995), green foxtail (O'Donovan et al 1997) and wild oat (Reinertsen et al 1984;Kirkland and Beckie 1998;Thill et al 1994) and increase crop yield. In contrast, other studies reported that N placement had little effect on the competitive ability of downy brome (Cochran et al 1990) or green foxtail (Kirkland and Beckie 1998). Further research is required to determine why differences occurred among studies and to determine the response of other weed species, including perennials, to N placement.…”

mentioning

confidence: 61%

Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat

Blackshaw¹,

Semach²,

Li³

et al. 2000

Can. J. Plant Sci.

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Foxtail barley (Hordeum jubatum L.) is becoming a more severe weed problem as conservation tillage becomes widely adopted on the southern Canadian prairies. A 5-yr field study was conducted to determine the combined effects of tillage, N rate, N placement and application timing of glyphosate to manage foxtail barley in spring wheat. Wide-blade tillage conducted in fall and spring, compared to zero-till, reduced foxtail barley biomass and seed production in all yr and increased wheat yield in 4 of 5 yr. Foxtail barley was highly competitive with wheat for added N. N fertiliser placed mid-row in 10-cm-deep bands reduced foxtail barley growth in 2 of 5 yr and increased wheat yield in 3 of 5 yr compared with soil surface broadcast N. Wheat yield sometimes was similar when N was banded at 60 kg ha−1 or broadcast at 120 kg ha−1, indicating the large advantage of banding N in some situations. Glyphosate at 800 g ha−1 applied preharvest or postharvest gave similar levels of foxtail barley control in 2 of 3 yr. Results indicate that foxtail barley can be adequately managed in wheat production systems utilizing conservation tillage. Key words: Foxtail barley, Hordeum jubatum, glyphosate, integrated weed management, nitrogen placement, zero tillage

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mentioning

confidence: 61%

Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat

Blackshaw¹,

Semach²,

Li³

et al. 2000

Can. J. Plant Sci.

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“…nutrients could occasionally be in the crop rows and occasionally between the crop rows. Placement of mineral nutrients has been shown to improve early crop growth and yield because of a shorter distance from the crop seeds to the nutrients and improved availability of the nutrients (Kähäri & Elonen, 1969; Esala & Larpes, 1986; Cochran et al ., 1990).…”

Section: Introductionmentioning

confidence: 99%

Influence of liquid manure application method on weed control in spring cereals

Rasmussen¹

2002

Weed Research

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Summary Injection of liquid manure (slurry) into the soil is an alternative to the traditional surface application. By the injection method, it is possible to place nutrients closer to the crop sown, thus offering the crop a competitive advantage over weeds. This study compares the response in crop yield, weed density and weed biomass to injection vs. surface application of liquid manure through three growing seasons in barley and oats. The manure applications were combined with treatments of weed harrowing or herbicide spraying or no treatment at all. The levels of weed control and crop yield obtained by harrowing and herbicides were larger when slurry was injected compared with surface application. Without any weed control treatments, the injection method decreased the final weed biomass in barley. The influence of nutrient injection on yield and weed control seemed to be modulated by the time of emergence and the early growth rate of the crop relative to weeds. Thus, because of its early root growth and development, barley responded more quickly to the injection treatment than oats. Consequently, barley became a more competitive crop.

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“…Petersen (2001) and Petersen and Mortensen (2002) reported that nitrogen uptake and dry matter production increased, when the distance from crop row to fertilizer band decreased. Furthermore, the shorter the distance from the plant to fertilizer, the more vigorous is the plant growth (Cochran et al, 1990;Rasmussen, 2002). In the present study, the weeds grew more vigorously in IR than in BR by uptake of nutrients from the fermented organic fertilizer applied in IR.…”

Section: Comparison Of the Relationship Of Vcr With Weedmentioning

confidence: 56%

Interseeding a Cover Crop as a Weed Management Tool is More Compatible with Soybean than with Maize in Organic Farming Systems

Uchino

Iwama

Jitsuyama

et al. 2015

Plant Production Science

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The effect of N placement on grass weeds and winter wheat responses in three tillage systems

Cited by 34 publications

References 8 publications

Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat

Tillage, fertiliser and glyphosate timing effects on foxtail barley (Hordeum jubatum) management in wheat

Influence of liquid manure application method on weed control in spring cereals

Interseeding a Cover Crop as a Weed Management Tool is More Compatible with Soybean than with Maize in Organic Farming Systems

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