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2 edition of Interaction of crop plant population with weed competition in corn (Zea mays L.), bush snap beans (Phaseolus vulgaris L.), and onion (Allium cepa L.) at differing stages of development found in the catalog.

Interaction of crop plant population with weed competition in corn (Zea mays L.), bush snap beans (Phaseolus vulgaris L.), and onion (Allium cepa L.) at differing stages of development

Clarence Frank Williams

Interaction of crop plant population with weed competition in corn (Zea mays L.), bush snap beans (Phaseolus vulgaris L.), and onion (Allium cepa L.) at differing stages of development

by Clarence Frank Williams

  • 115 Want to read
  • 5 Currently reading

Published .
Written in English

    Subjects:
  • Corn.,
  • Bush snap bean.,
  • Onions.

  • Edition Notes

    Statementby Clarence Frank Williams.
    The Physical Object
    Pagination62 leaves, bound :
    Number of Pages62
    ID Numbers
    Open LibraryOL14351747M

      The presence of associated plants in a multi-crop can reduce the damage to the main crop species in three ways, all involving a lower population growth rate of the pest. In the first situation, the associated plants are more attractive hosts for the pest than the crop (host-plant quality hypothesis).Cited by:   This book looks at the current state of food security and climate change, discusses the issues that are affecting them, and the actions required to ensure there will be enough food for the future. By casting a much wider net than most previously published booksto include select novel approaches, techniques, genes from crop diverse genetic resources or relativesit shows how agriculture may Author: Shyam Singh Yadav.

    Biological control of plant diseases has been considered a viable alternative method to manage plant diseases. Biological control is the inhibition of growth, infection or reproduction of one organism using another organism (Cook, ; Baker, ). Biologically effective dose and selectivity of RPA (isoxaflutole) for preemergence weed control in corn. Weed Technol. Knezevic S. Z., M. J. Horak and R. L. Vanderlip. Relative time of redroot pigweed (Amaranthus Retroflexus L.) emergence is critical in pigweed - sorghum (Sorghum bicolor L.) competition. Weed Sci.

    The Weed-Risk Assessment (WRA) system (Pheloung et al. ) [2] was developed in Australia and is the most widely known and applied border weed-risk assessment system encompassing all plant groups. The central ‘argument’ is that if a species has had the opportunity to become a weed in another country, and it has done so, then it should be. Plant growth promoting bio-fertilizer (PGPB): Examples of plant growth rhizobacteria are Pseudomonas Spp. etc: these work by producing hormones and anti-metabolites which promotes root growth, decomposition of organic matter which help in mineralization of the soil thereby increasing availability of nutrients and improving crop yield [3,35 Cited by:


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Interaction of crop plant population with weed competition in corn (Zea mays L.), bush snap beans (Phaseolus vulgaris L.), and onion (Allium cepa L.) at differing stages of development by Clarence Frank Williams Download PDF EPUB FB2

Nicholas E. Korres, in Non-Chemical Weed Control, Nitrogen Fertilization. Weed-crop competition for nutrients, especially for nitrogen, is one of the most important problems since the availability of nitrogen is often the limiting factor in plant growth especially in soils with low supplementary ability.

The factors that account for nitrogen variation in crop systems are soil type. R.E.L. Naylor, in Encyclopedia of Applied Plant Sciences, Weed Population Dynamics.

The biology of annual weeds emphasizes reproduction. Seed production, dispersal, longevity, dormancy, and germination are important features of weed population dynamics (see WEEDS | Weed Seed Biology).The weeds growing in a crop can be considered as merely the vehicle by which seeds in the soil produce.

Recently, the concept of weed/crop competition has become a marketing strategy for several herbicide manufacturers. The point of debate tends to focus on when competition (from weeds) should be removed so crop yields (of corn or soybean primarily) are not affected.

General Overviews. Darwin’s On the Origin of Species contains a good deal about competition, usually competition between species operating as the force of natural selection.

There is a good deal about plants and plant ecology in Darwin’s work. Of course, Darwin was greatly influenced by the English economist Thomas Malthus, who wrote about resources and population growth, including the. Crop rotation is the practice of growing a series of different types of crops in the same area across a sequenced of growing reduces reliance on one set of nutrients, pest and weed pressure, and the probability of developing resistant pest and weeds.

Growing the same crop in the same place for many years in a row gradually depletes the soil of certain nutrients and selects for a. Weed Management in Perspectives on the Future of Weed Science. The Robovator system is designed to detect the difference between the crop plant and weed based on the recognition of the crop row (as described earlier) and the size difference between the crop and weed.

This was refined into a hypothesis that early-season crop–weed Cited by:   A vegetable crop rotation x weed management intensity field trial was continued into the 4th of 5 years with the following crops in production this year: sweet corn, beet, cabbage and potatoes.

In the spring, crop rotations involving continuous sweet corn had lower weed seed bank densities than those involving cabbage.

maize. The data regarding LAI as affected by plant population densities are given in table It is revealed that LAI was significantly affected and increased in linear fashion with increase in plant population.

The treatments having plant population ofandplants ha-1 produced higher LAI of andrespectively. Plant allelopathy is one of the modes of interaction between receptor and donor plants and may exert either positive effects (e.g., for agricultural management, such as weed control, crop protection, or crop re-establishment) or negative effects (e.g., Cited by:   During the course of this century, increasing human population and economic development will continue to put pressure on agricultural systems for increased crop yields ([Rosegrant and Cline, ][1]; [Foley et al., ][2]).

Grains produced. Weed competition has become a significant discretion in limiting the yield of any crop (Siddiqui and Bajwa, ). Weeds fight with the crop for the place, fluorescence, moisture, nutrient and. Interaction of crop plant population with weed competition in corn (Zea mays L.), bush snap beans (Phaseolus vulgaris L.), and onion (Allium cepa L.) at differing stages of development / Article.

Weeds Australia is designed to connect you with knowledge to make informed decisions about managing invasive weeds within Australia. The site is currently a beta version and we welcome your feedback as we continue to make content updates during temperatures inhibit plant growth in many regions; lack of warmth in winter is a limiting factor that keeps many species restricted to the tropics.

Another limiting factor is often competition from species that use the same resources. Competition is the principal interaction. FIELD CORN - LESS THAN 3% ORGANIC MATTER - MEDIUM AND FINE General Information erratic weed control or crop injury.

Over application may result in crop injury or Weed suppression is a visual reduction in weed competition (reduced population, size, and/or vigor) as compared to an untreated area. Degree of control.

Abstract. Crop yields on-farm rarely approach their production potential, partly as a result of growth reduction due to weed interference. The ability of rice to maintain yield in the presence of barnyardgrass (a measure of tolerance) may be improved if the time between emergence or transplanting and canopy closure is by: 7.

Brazilian research in corn production. In Brazil, the corn seed industry involves a number of national and multinational corporations, as well as public entities that are all working to develop new cultivars and technologies [].In recent years, these enterprises have marketed cultivars that target specific productive sectors, which rely on high, medium and low levels of : Wilian Henrique Diniz Buso, Luciana Borges e Silva.

Herbicide options for planting cover crops after corn and soybean. Crop Watch. University of Nebraska-Lincoln Extension. Ma Jhala, A.J. Acuron - A new corn herbicide. Crop Watch. University of Nebraska-Lincoln Extension. Jhala, A.J.

() A new chart aids selection of diverse site of action herbicides. Crop. The beneficial effect can be called positive allelopathy, the detrimental effect negative allelopathy.

The process, by which a plant acquires more of the available resources (such as nutrients, water or light) from the environment without any chemical action on the surrounding plants is called resource competition. That cropped plants can be manipulated in order to interfere with weeds is not a novel conjecture (Robinson and Dunham ), but this hypothesis has received renewed attention –crop competition occurs when individuals share the same limited resource and spatial and temporal niches (Zimdahl a,b).The degree of competition experienced by an individual plant is Cited by: 6.

Treatments included weed competition periods of 0 (Weed-free), 3, 5, 7, 9, and 16 weeks after planting (WAP) where weeds were allowed to compete with the peanut crop then removed and plots maintained weed-free for the remainder of the season; weed-free periods of 0 (Full season weedy), 3, 5, 7, 9, and 16 WAP where plots were maintained weed.Cotton production in China has developed rapidly during the last 60 years.

Using only 15% of the world’s cotton land, China currently has produced 30% of the world's cotton. Such a great achievement is largely attributed to adoption of intensive farming technologies and cultural practices, including seedling transplanting, plastic mulching, double cropping, plant pruning, and super-high Cited by: 3.Initial changes in plant population and productivity during secondary succession along an in situ gradient of carbon dioxide and temperature.

Oecologia. Changes in biomass and root:shoot ratio of field-grown Canada thistle (Cirsium arvense), a noxious, invasive weed, with elevated CO2: implications for control with glyphosate.