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Author: John Andreas Widtsoe
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 502
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Book Description
Author: John Andreas Widtsoe
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 502
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Book Description
Author: I. Arnon
Publisher: Elsevier
ISBN: 0444599568
Category : Law
Languages : en
Pages : 992
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Book Description
Throughout history, man has, by over-use, consistently reduced the productive capacity of dry lands. This degradation of one-third of the land area of the globe is, unfortunately, increasing. In recent years, world interest has turned to the problems of pollution of the environment and the impending food shortage as world population grows explosively. Thus the attention of international and other agricultural bodies has turned to the need for preserving and developing more effectively the agricultural potential of these areas.This book provides a comprehensive review of present knowledge of the agriculture of dry lands, with special emphasis on measures for conserving their natural resources. Management practices are described which aim at optimizing productivity of rainfed and irrigated agriculture without adverse effects on sustainability. Land use in the dry regions, and its evolution throughout history is described and analysed, and the lessons to be learnt from destructive technologies are stressed. In particular, current proposals for an alternative agriculture are discussed and their justification is questioned. This is a generalist work, which specialists can also find interesting, not only in their own discipline but as a concise way of acquainting themselves with the state-of-the-art in associated fields. Increasing specialisation with each discipline using its own vocabulary leads inevitably to communication problems, and the need for multi-disciplinary teams makes inter-discipline communication indispensible.
Author: John Andreas Widtsoe
Publisher:
ISBN: 9780359021444
Category : Education
Languages : en
Pages : 140
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Book Description
John Andreas Widtsoe demonstrates an immense knowledge of soil and farming conditions; much of the advice in this classic manual remains useful and relevant to this day. An excellent collection of knowledge is united in this guidebook, which commences by setting out the concept and core principles of dry farming. Much of the Earth is covered by land which receives only modest rainfall each year; coupled with a lack of an underground water source and/or water rights, many landowners found themselves having to grow crops with dry farming methods. Widtsoe was one such farmer, and his knowledge of the land's properties would prove decisive in his success. The properties and composition of the soil are crucial in deciding what crops to grow, making maximum use of limited water resources in an unirrigated plot by encouraging the soil's water retention, and sowing seeds with methods to maximize germination are all important aspects of running a dry farm.
Author: I. Arnon
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 924
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Book Description
Grain crops; Industrial crops; Forage supply.
Author: Surajit K. De Datta
Publisher: Int. Rice Res. Inst.
ISBN: 0471097608
Category : Rice
Languages : en
Pages : 642
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Book Description
Author: Konrad Mengel (etc)
Publisher: Springer Science & Business Media
ISBN: 9781402000089
Category : Nature
Languages : en
Pages : 868
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Book Description
Plant nutrition; The soil as a plant nutrient medium; Nutrient uptake and assimilation; Plant water relationships; Plant growth and crop production; Fertilizer application; Nitrogen; Sulphur; Phosphorus; Potassium; Calcium; Magnesium; Iron; Manganese; Zinc; Copper; Molybdenum; Boron; Further elements of importance; Elements with more toxic effects.
Author: Francisco J. Villalobos
Publisher: Springer
ISBN: 3319461168
Category : Technology & Engineering
Languages : en
Pages : 543
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Book Description
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).
Author: Theib Y. Oweis
Publisher: CRC Press
ISBN: 0203106253
Category : Nature
Languages : en
Pages : 276
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Book Description
Dry areas suffer not only from limited rainfall but alsonatural leakage'-90% of rainwater is lost directly or indirectly, and is unavailable for agriculture or domestic use. Water harvesting is a low-cost, easy-to-use, environmentally-friendly way to recover a large part of this lost water. How does water harvesting work? Which sites or areas are
Author: Gary Paul Nabhan
Publisher: Chelsea Green Publishing
ISBN: 1603584536
Category : Arid regions agriculture
Languages : en
Pages : 0
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Book Description
This book lays out a variety of practical ways to prepare for a changing climate by paying attention to soil, water harvesting, types of crops planted, and ways to protect pollinators.
Author: Michael Mortimore
Publisher: World Conservation Union
ISBN:
Category : Business & Economics
Languages : en
Pages : 100
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Book Description
Drylands cover 41 percent of the earth' s terrestrial surface. The urgency of and international response to climate change have given a new place to drylands in terms both of their vulnerability to predicted climate change impacts and their potential contribution to climate change mitigation. This book aims to apply the new scientific insights on complex dryland systems to practical options for development. A new dryland paradigm is built on the resources and capacities of dryland peoples, on new and emergent economic opportunities, on inward investment, and on the best support that dryland science can offer.
