Author: Francisco J. VillalobosPublish On: 2017-01-25
It is estimated that not more than 250 species have become important weeds for agricultural production. ... However, the most troublesome weed species usually
show special characteristics that allow their dispersal and persistence in agricultural systems and ... Weeds use the general dispersal mechanisms of plants (wind, animals, water, gravity) but also present among their invasion strategies the so ...
Author: Francisco J. Villalobos
Category: Technology & Engineering
This textbook explains the various aspects of sustainable agricultures to undergraduate and graduate students. The book first quantifies the components of the crop energy balance, i.e. the partitioning of net radiation, and their effect on the thermal environment of the canopy. The soil water balance and the quantification of its main component (evapotranspiration) are studied to determine the availability of water to rain fed crops and to calculate crop water requirements. Then it sets the limitations of crop production in relation to crop phenology, radiation interception and resource availability (e.g. nutrients). With that in mind the different agricultural techniques (sowing, tillage, irrigation, fertilization, harvest, application of pesticides, etc.) are analyzed with special emphasis in quantifying the inputs (sowing rates, fertilizer amounts, irrigation schedules, tillage plans) required for a given target yield under specific environmental conditions (soil & climate). For all techniques strategies are provided for improving the ratio productivity/resource use while ensuring sustainability. The book comes with online practical focusing on the key aspects of management in a crop rotation (collecting weather data, calculating productivity, sowing rates, irrigation programs, fertilizers rates etc).
With persistence, many farmers have been successful in developing effective weed management strategies that are both economical and environmentally
sound. 1 Maxwell, B.D.; MX. Roush; S.R. Radosevich. 1990. Predicting the
Author: Douglas Gunnink
Publisher: DIANE Publishing
Category: Technology & Engineering
Written for farmers who are thinking about changing their farm management from a more conventional farming system to a sustainable, reduced-input farming system, and for agri-professionals who assist them. Written for Minnesota farmers, but has wide applicability to all regions. Many specific examples of successful adaption to sustainable farming.
Perhaps the most important point in developing a sustainable weed management
plan on your farm is to be patient This ... With persistence , many farmers have
been successful in developing effective weed management strategies that are ...
A study of the nature and location of weed infestation, a survey of the area
infested, survival and persistence strategy of ... particularly with a physically
continuous stand of a single weedy species (e.g. rangelands or a non- agricultural system).
Author: Mahesh K. Upadhyaya
The increase in organic farming and concerns about potential negative effects on human health and the environment is creating a demand for pesticide-free food and alternative weed management techniques. This book provides a comprehensive examination of non-chemical weed management.
Author: Jose Carlos Jimenez-LopezPublish On: 2020-01-08
and persistence of their seeds in the soil seed bank. ... Seeds in the soil
represent the passive weed population that remain viable for extended periods of
time and able to re-infest agricultural lands ... Information on weed biology helps
optimize weed management strategies by prediction of weed emergence time
and weed ...
Author: Jose Carlos Jimenez-Lopez
Publisher: BoD – Books on Demand
Seed dormancy and germination are critical processes for the development of plants. Seed dormancy allows seeds to overcome harsh periods of seedling establishment, and is also important for plant agriculture and crop yield. Several processes are involved in the induction of dormancy and in the shift from the dormant to the germinating state, and hormones and regulatory genetic networks are among the critical factors driving these complex processes. Germination can be prevented by different factors leading to seed dormancy, which is highly dependent on environmental cues. During and after germination, early seedling growth is sustained by catabolism of stored reserves (proteins, lipids, or starch) accumulated during seed maturation, supporting cell morphogenesis, chloroplast development, and root growth until photo-auxotrophic growth can be resumed.
ensuring the longevity of a plant species and, in agricultural terms, the
appearance of new seedlings in future crops. Thus ... Seeds with short persistence, such as those of barren brome (Anisantha sterilis), will have their
primary effect on crops grown in the ... In developing weed management strategies and in planning the detailed tactics it is crucial to emphasise the
necessity for a long-term approach.
Author: Robert E. L. Naylor
Publisher: John Wiley & Sons
Category: Technology & Engineering
Weed Management Handbook updates the 8th edition of Weed Control Handbook (1990). The change in the title and contents of the book from previous editions reflects both the current emphasis on producing crops in a sustainable and environmentally-friendly manner, and the new weed management challenges presenting themselves. This landmark publication contains cutting edge chapters, each written by acknowledged experts in their fields and carefully drawn together and edited by Professor Robert Naylor, known and respected world-wide for his knowledge of the area. The sequence of chapters included reflects a progression from the biology of weeds, through the underpinning science and technology relating to weed management techniques including herbicides and their application to crops, leading to principles of weed management techniques. Finally a set of relevant case studies describes the main management options available and addresses the challenges of reduced chemical options in many crops. Weed Management Handbook is a vital tool for all those involved in the crop protection / agrochemical industry, including business managers, horticultural and agricultural scientists, plant physiologists, botanists and those studying and teaching BASIS courses. As an important reference guide for undergraduate and postgraduate students studying horticultural and agricultural sciences, plant physiology, botany and crop protection, copies of the book should be available on the shelves of all research establishments and universities where these subjects are studied and taught. Weed Management Handbook is published for the British Crop Protection Council (BCPC) by Blackwell Publishing.
The importance of experimental site hygiene practices is emphasised by
documentation of the persistence and / or ... The result will be a complete ,
functional environmental weed risk strategy for use in forage improvement
Relevance of Seed Kill for the Control of Annual Grass Weeds in Crops R.W.
Medd and H.I. Ridings Agricultural ... importance of these factors in relation to weed persistence and to compare seed and plant kill strategies for long term
Allelopathy may be used for weed control through selection of allelochemicals
with herbicidal activity from plants or ... the natural products are broken down
rapidly and thus do not persist in the environment for long time unlike synthetic
herbicides . An alternative for overcoming herbicides related problems is to use
allelopathic strategies in weed management for sustainable agriculture ( Narwal ,
1997 ) .
However , exchanging one level of toxicity and persistence for a lower one does
not alter the continuing need for chemical inputs . In fact , by focusing weed
management efforts on a single strategy , herbicide resistant crops can increase weed ...
SEEDBANK PERSISTENCE OF FIVE ARABLE WEED SPECIES IN AUTUMN -
SOWN CROPS H.M. LAWSON , G.McN . WRIGHT Scottish Crop Research
Institute , Invergowrie , Dundee DD2 5DA B.J. WILSON , K.J. WRIGHT
Department of Agricultural Sciences , University of Bristol ... results are compared
with data for a range of other arable weeds and discussed in relation to weed
control strategies .
Predicting the evolution and dynamics of herbicide resistance in weed
populations . Weed ... atrazine persistence in an allophanic soil with Opus2 .
Pesticide ... Pesticide contamination of water bodies in New Zealand and the role
of agriculture . Wellington ... Gorse control by goats : effective strategies in
A. K. WATSON2 Regina Research Station , Agriculture Canada , Box 440 ,
Regina , Saskatchewan S4P 3A2 . ... is an introduced persistent perennial weed
species which is commonly found in cultivated land in western Canada and ...
Cultural , chemical and biological control strategies of the species are reviewed .
These perennials produced new shoots from perennial root stocks after each
weeding and were more persistent as competitors than annual weeds which are
killed by uprooting . Growth , dry weight , and yield of ears of Hopi blue maize
1987 . Persistence , germinability , and distribution of jointed goatgrass (
Aegilops cylindrica ) seed in soil . Weed Sci . 35 : 149 - 154 . ... [ INCARDA )
International Center for Agricultural Research in the Dry Areas . 2005 . Seed and
... Management strategies for winter annual grass weeds in winter wheat . In L . S
. Murphy , ed ...
A shift to postemergence weed control could also have a significant impact in
reduced or no - till agriculture where preplant ... In general , soybean yields begin
to be affected by weeds when the weeds persist for the first 4 to 6 weeks of the
growing season ... Impact of the Critical Period on Weed Management Strategies
Let 13 Postemergence Herbicide Timing Jeffrey Gunsolus, University of
Author: Asian-Pacific Weed Science Society. ConferencePublish On: 1979
THE ECONOMIC IMPORTANCE OF WEEDS IN AGRICULTURE -A REVIEW OF
ESTIMATES : 1950 to 1979 . ... It seems certain that most weed control strategies
have evolved without full knowledge of the actual losses to be prevented and the
relevant economic ... Additionally , weed problems persist because of the
favourable environment created for their proliferation by modern agricultural
Proceedings of a Conference Concerning the Role of Agriculture in Clean Water,
Held at Iowa State University, November 1969 ... Weed Res . 6 : 58–66 .
Cochrane , D. Ř . , Pope , J. D. , Jr. , Nicholson , H. P. , and Bailey , G. W. 1967.
The persistence of silvex in water and hydrosoil . ... in environmental
management and an admission that with any strategy there will be a certain
amount of compromise .