The Autotoxic Effects of Alfalfa Extracts on Seed Germination and Seedling Growth PDF Download
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Author: Hwei-Yiing Li
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 86
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Book Description
Author: Hwei-Yiing Li
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 86
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Book Description
Author: Mohammad Abdulaziz S. Abdulsalam
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 212
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Book Description
Author: Charlie Rife
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 140
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Book Description
Author: D. J. Undersander
Publisher:
ISBN: 9780891181798
Category : Alfalfa
Languages : en
Pages : 0
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Book Description
The Alfalfa Management Guide is designed especially for busy growers, with to-the-point recommendations, useful images of diseased plants and pests, and quick-reference tables and charts. Revised in 2011, this edition of Alfalfa Management Guide covers the latest strategies for alfalfa establishment, production, and harvest-soil testing, fertilizing, integrated pest management, rotation, and more.
Author: Tafesse Kibatu Shikur
Publisher: LAP Lambert Academic Publishing
ISBN: 9783848423712
Category :
Languages : en
Pages : 100
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Book Description
Citrus seedlings are generally slower in growth when compared with other major fruits. It is clear that the more the seedlings stay in the nursery the more difficult it would be to fulfill required nursery activities such as protecting the seedlings from environmental hazards and diseases. In addition rapid growth rate will reduce the cost of nursery operations and enable fast virus indexing. Triacontanol, a common constituent of plant waxes, was shown to be an active growth substance, which at nanomolar concentrations increased the growth and yield of crops. However, these synthetic growth regulators are expensive and not available in developing countries. Growth stimulating effect of alfalfa has been documented by mulching or watering plant with an extract prepared by socking in water. Two experiments were conducted in two sites. The result of the study have revealed that seedling length, number of leaves, seedling diameter, dry weight and leaf area of Troyer Citrange can be increased by manipulating socking time and application intervals of alfalfa water extract and amount of alfalfa mulch.
Author: John Alan Jennings
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 356
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Book Description
Autotoxicity of alfalfa (Medicago sativa L.) is a form of allelopathy in which established alfalfa plants produce a chemical(s) that inhibits establishment and yield of new alfalfa reseeded too soon following alfalfa. Effects of rotation intervals, soil texture, and the zone of influence of old alfalfa plants were evaluated to develop appropriate management strategies for reseeding old alfalfa stands. Experiments were conducted at three locations for rotation interval and zone of influence studies. For the rotation interval experiment, old alfalfa was killed with herbicides at different time intervals before a common spring planting date. Plant density of alfalfa at intervals of 12-mo, 6-mo, 0.75-mo, and 0.5-mo after killing old alfalfa with herbicides was 5.9, 2.2, 13.3, and 19.2% lower, respectively, than that for the control rotation interval of 18 mo. Dry matter yield was 0.5, 6.5, 2.9, and 7.8% lower, respectively, than the 18-mo control. Relative rankings of rotation intervals for both plant density and dry matter yield were consistent for 3 yrs after seeding. Granular chlorpyrifos insecticide treatment at planting did not significantly affect plant density or yield, but seed treatment with metalaxyl fungicide improved plant density by 5% over all five rotation intervals. Establishment and yield of new alfalfa within a 20-cm radius of an old alfalfa plant were reduced by 26% and 56%, respectively, compared to the control distance of 80-100 cm from an old plant, but yield of alfalfa seedlings between 40 and 80 cm away from the old plants was increased by 12% to 15% compared with the control. Autotoxic chemical(s) in water extracts from alfalfa herbage required 50% more water to move through 10-cm soil columns of Carlow silty clay loam than through Sarpy fine sandy loam. Results suggest that a 12-mo rotation interval is adequate for reseeding alfalfa with minimal autotoxicity; establishment and yield of new alfalfa would be inhibited at old plant densities as low as 8 plants m$\sp{-2}$ due to the autotoxic zone of influence; and alfalfa may be reseeded after shorter rotation intervals on sandy soils than on heavy textured soils due to differential leaching of the autotoxic chemical(s) by rainfall or irrigation.
Author: Zahid A. Cheema
Publisher: Springer Science & Business Media
ISBN: 3642305946
Category : Science
Languages : en
Pages : 513
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Book Description
Allelopathy is an ecological phenomenon by which plants release organic chemicals (allelochemicals) into the environment influencing the growth and survival of other organisms. In this book, leading scientists in the field synthesize latest developments in allelopathy research with a special emphasis on its application in sustainable agriculture. The following topics are highlighted: Ecological implications, such as the role of allelopathy during the invasion of alien plant species; regional experiences with the application of allelopathy in agricultural systems and pest management; the use of microscopy for modeling allelopathy; allelopathy and abiotic stress tolerance; host allelopathy and arbuscular mycorrhizal fungi; allelopathic interaction with plant nutrition; and the molecular mechanisms of allelopathy. This book is an invaluable source of information for scientists, teachers and advanced students in the fields of plant physiology, agriculture, ecology, environmental sciences, and molecular biology.
Author: James Leroy Helm
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 4
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Author: Eric Lichtfouse
Publisher: Springer Science & Business Media
ISBN: 9400703945
Category : Technology & Engineering
Languages : en
Pages : 985
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Book Description
This book gathers review articles that analyze current agricultural issues and knowledge, then propose alternative solutions. It will therefore help all scientists, decision-makers, professors, farmers and politicians who wish to build a safe agriculture, energy and food system for future generations.
Author:
Publisher:
ISBN:
Category : Crop science
Languages : en
Pages : 174
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Book Description
