Uptake of more important mineral components by common field weeds on loess soils

Malicki, L.; Berbeciowa, Czesława

doi:10.5586/aa.1986.012

Cited by 10 publications

(2 citation statements)

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“…However, weed and crop growth may be limited by nutrient availability, even when N is added at sufficient rates . Weeds can have a higher nutrient requirement than crops and compete strongly for nutrients, even when high rates of fertilizer are applied (Burgos et al 2006;Johnson 2010b, 2011c;Malicki and Berbeciowa 1986). High N application rates can also result in greater leaf area indices of weeds and thereby reduce the light available to rice (Ampong-Nyarko and De Datta 1993).…”

Section: Weed Managementmentioning

confidence: 99%

Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia

2012

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Rice is a principal source of food for more than half of the world population, and more than 90% of rice worldwide is grown and consumed in Asia. A change in establishment method from manual transplanting of rice seedlings to dry-seeded rice (DSR) has occurred in some countries as growers respond to increased costs or decreased availability of labor or water. However, weeds are a major constraint to DSR production because of the absence of the size differential between the crop and the weeds and the suppressive effect of standing water on weed growth at crop establishment. Herbicides are used to control weeds in DSR, but because of concerns about the evolution of herbicide resistance and a scarcity of new and effective herbicides, there is a need to integrate other weed management strategies with herbicide use. In addition, because of the variability in the growth habit of weeds, any single method of weed control cannot provide effective and season-long control in DSR. Various weed management approaches need to be integrated to achieve effective, sustainable, and long-term weed control in DSR. These approaches may include tillage systems; the use of crop residue; the use of weed-competitive cultivars with high-yield potential; appropriate water depth and duration; appropriate agronomic practices, such as row spacing and seeding rates; manual or mechanical weeding; and appropriate herbicide timing, rotation, and combination. This article aims to provide a logical perspective of what can be done to improve weed management strategies in DSR.

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Section: Weed Managementmentioning

confidence: 99%

Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia

2012

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“…Carlson and Hill (1985) observed that wild oat was able to utilize nutrients, such as nitrogen, more efficiently than wheat (Triticum aestivum L.). Teyker et al ( 1991) noticed that red root pigweed responded more to supplemental N than maize (Zea mays) and accumulated 2.5 times as much N in shoots when supplied with large amounts of N. Weeds require the same nutrients as crops and frequently are more effective in absorbing them (Malicki and Berbeciowa 1986); therefore, a competitive advantage is gained by the weed in many circumstances.…”

Section: Nitrogenmentioning

confidence: 99%

Factors influencing weed spatial distribution

Battles¹

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Weed spatial patterns commonly occur as patchy patterns within agricultural fields. These patterns may be associated with soil characteristics, such as water drainage, pH and nutrient availability, or with past or current management practices such as sprayer skips and weed seed movement. In most situations it is difficult to determine what factors are responsible for the pattern of weed distribution. Many studies have associated a single soil characteristic with germination, growth and seed production of weed species, but few have evaluated the interaction of multiple soil characteristics on weed dynamics. Spatial distribution of weeds Spatial distributions of weeds are highly variable between and within agricultural fields. Dependent largely upon previous management practices and variation of soil and environmental properties, weed distributions can range from large areas with uniform densities to small patchy distributions. Spatial patterns of weeds are generally similar to seed bank distributions. Cardina et al. (1996) observed high correlations between common lambsquarter emergence and seed bank densities in no-till and moldboard plow tillage systems. Areas were also observed where seed banks were poorly correlated with weed densities. Although weed densities and seed banks are generally correlated, few studies have adequately explained the spatial variability of weeds that is commonly observed. Soils have a wide range of characteristics that are non-uniformly distributed in

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Weed Ecology

Zimdahl

1993

Fundamentals of Week Science

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Uptake of more important mineral components by common field weeds on loess soils

Cited by 10 publications

References 0 publications

Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia

Weed Ecology and Weed Management Strategies for Dry-Seeded Rice in Asia

Factors influencing weed spatial distribution

Weed Ecology

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