Geometry.Net - Agriculture: Soils

Soils And Agriculture: Soil Resource, Quality And Degradation Processes - Cahier
soils and agriculture soil resource, quality and degradation processes.Cahiers d'études et de recherches francophones / agricultures. Vol.
http://www.john-libbey-eurotext.fr/articles/agr/8/4/301/en-resum.htm

Extractions: Summary: This paper concerns limitations in world soil resources and major soil degradation processes. Physical (erosion-compaction) and chemical (acidity) processes are mainly responsible for degradation, but in developed countries phenomena related to agricultural intensification have upset environmental soil functions and other environmental components (water, air, etc.). In terms of global food security, it is predicted that in developing countries with the highest population growth, increased agricultural production will lead to both quantitative (water-soils) and qualitative (environmental constraints) limitations. In addition, predicted climatic changes will likely worsen the situation and new biotechnological advances will not compensate for these negative impacts. It is essential to have access to better indicators to be able to efficiently monitor soil and ecosystem quality, thus protecting world soil resources and facilitating their sustainable management.
Resources From The Sustainable Agriculture Network (
professionals learn more about how to apply sustainable agriculture principlesand Building soils for Better Crops 2nd Edition Published in 2000 $19.95
http://www.sare.org/htdocs/pubs/resources/

Extractions: S ince 1988, the Sustainable Agriculture Research and Education (SARE) program has been the U.S. Department of Agriculture's primary means of studying and spreading the word about sustainable agriculture. The program has funded more than 1,600 projects that help advance knowledge about sustainable practices and systems nationwide. The Sustainable Agriculture Network (SAN) serves as SARE's outreach arm, offering farmer-ready information through electronic and print publications. SAN resources have helped hundreds if not thousands of farmers, ranchers, Extension educators and other agricultural professionals learn more about how to apply sustainable agriculture principles and practices in farm settings across the United States. Cover photos courtesy of Jerry DeWitt In one complete volume, this must-have resource for direct market producers covers the latest tips and trends from leading-edge sellers, managers and market planners all over the country. Learn about the "hottest" products to grow and sell as well as how best to display and merchandise your products, set prices and run a friendly, profitable business.
Tropical Agriculture And Natural Resource Mgt.-FIELD GUIDE-Soils
soils Soil formation occurs when parent material (rocks) breaks downinto finer particles as a result of weathering. In the tropics
http://www.mccc.edu/tropicalhort/page5.htm

Extractions: S oil formation occurs when parent material (rocks) breaks down into finer particles as a result of weathering. In the tropics, rainfall is a key component to weathering as are the relatively high temperatures. Biological factors such as the natural vegetation, and time, are also important in soil formation. In Puerto Rico, there is an unusually large number of different soil types -eight of the ten soil orders are represented on the island- because of the diverse parent materials, rainfall patterns, and slope of the land. More than half of the land area on the island has a slope of more than 40 degrees. Hurricanes can even affect soil formation. The frequent landslides that result from these storms interfere with natural weathering and horizon formation in the uplands. Inceptisols: these are found throughout the central and eastern uplands and are the most abundant soil type in Puerto Rico. These are young soils with little horizon development. They are soils prone to erosion, but can be productive if well-drained. They are moderately fertile. Ultisols: these are the second most abundant soils on the island. They are highly weathered and acidic with low base saturation, which means they have low levels of calcium, magnesium and potassium. They are found in areas of high rainfall, such as the western uplands. Coffee is grown on these soils, and they can be highly productive if fertilized.
Wholesale Products And Drop Shipping Information! Science Agriculture Soils
Intended for agriculture and horticulture. WWW Virtual Library soils andsubstrates - A most comprehensive resource but no longer updated.
http://www.wholesale-dropshipping.com/catalog.php/Science/Agriculture/Soils/

Extractions: Top Science Agriculture Soils ... Soil Morphology, Classification and Survey See also: Science: Agriculture: Instruments and Supplies Science: Earth Sciences The Alberta Soil Science Workshop - Information and details about the venue, the papers and organisation of this meeting to be held from February 19 - 20, 2003 - Edmonton, Alberta, Canada. Also includes abstracts and papers from previous meetings, starting in 1998. Bureau of Soils and Water Management - Philippine national agency on agricultural land and water resources assessment, conservation, and management. Has details about soil classification, soil maps and a soil museum. A Compendium of On-Line Soil Survey Information - Extensive collection of on-line information on soil survey activities, institutions, datasets, research, and teaching materials world-wide.
GRDC - On Farm Trials - Describing Australian Soils
Several other soil types are less commonly used for agriculture. They include Hydrosols(seasonally wet or permanently wet soils), Organosols (organic soils
http://www.grdc.com.au/growers/oft/soiltype.htm

Extractions: The GRDC has decided to use the terminology of the Australian Soil Classification A list of the ASC soil type names, together with a brief description and links to other common descriptors, is provided below. These soils contain calcium carbonate (as limestone, calcrete or other forms) as soft or hard fragments or as a solid layer. They occur in areas with low rainfall. Limitations for agriculture include shallow depth, low water retention and wind erosion on the sandier forms. High salinity, alkalinity and sodicity may also be a problem. Soil fertility deficiencies are widespread. Also known as solonised brown soils; grey-brown and red calcareous soils; calcareous sands. Hypocalcic Calcarosol Supracalcic Calcarosol Hypercalcic Calcarosol Calcic Calcarosol Also know as non-calcic brown soils; some red-brown earths and a range of podzolic soils; some ironstone gravel soils. Red Chromosol Brown Chromosol Yellow Chromosol Grey Chromosol Dermosols occur as moderately deep and well-drained soils in the wetter areas of eastern Australia. They may be strongly acid in the high rainfall areas or highly alkaline if they contain calcium carbonate. Dermosols support a wide range of land uses, and cereal crops, especially wheat, are commonly grown on the more fertile examples.
AGRICULTURE PRACTICES TO SEQUESTER CARBON IN SOILS -- 2001 NAWG Proceedings
agriculture PRACTICES TO SEQUESTER CARBON IN soils. Charles W. RiceDepartment of Agronomy, Kansas State University, Manhattan, KS
http://www.wheatimprovement.org/Forum/4/rice.html

Extractions: E-mail: cwrice@ksu.edu Table 1. Land Use for C Sequestration in agricultural systems(Lal et al., 1998) Management Strategies Soil Management Crop Management Estimates of C sequestration have been made by Lal et al. (1998) (Table 2). In one study in Kansas, we have measured an increase of 2 Mt C ha-1 (1 ton C a-1) after 10 years of no-tillage corn. Cropping sequences can also affect soil C. In Kansas, intensifying cropping systems by conversion from wheat-fallow rotation to wheat-grain sorghum-fallow rotation in western Kansas increased soil C levels. Proper selection of cropping systems with the climate and soil can prevent the lost of soil C. After 10 years of a wheat-sorghum rotation in western KS, soil C was not different than the native sod with no-tillage and minimum tillage systems. The C was more protected in the no-tillage system indicating greater stabilization than the tilled system. While much of the discussion of carbon sequestration has been directed to forests, global estimates for C sequestration for indicate the agricultural lands are 45 to 90 % of forests. If grasslands and rangelands are considered, then managed lands contributions to carbon sequestration are greater than forests.
Uklinks.org, Uk Agriculture, Uk Crops And Soils
University of Aberdeen details of teaching, research, and personnel. Unsaturatedsoils - Theory into Practice - Unsaturated soils - Theory into Practice.
http://www.uklinks.org/Science/science_agriculture/science_agriculture_crops_and

Extractions: at 50% off Shopping Amazon Pricerunner.com Pricerunner.com provides consumers with easy online access to technical specifications, and more importantly, the best prices of consumer goods. Workthing Workthing is a total employment network that addresses all aspects of the world of work. Agony aunts, training material, interactive tools, and even salary advice, are features they offer users. ADAS Agronomy Inter@ctive - information source for arable farmers, supplying regularly updated crop notes and technical documents. British Geomorphological Research Group's Rainfall Simulation Database - intended to provide information about rainfall simulators, their set up, and use. Hemp Industries Association - dedicated to industry growth and accelerating expansion in the commercial hemp supply and world market demand. International Centre for Plantation Studies University of Aberdeen - details of teaching, research, and personnel.
CLASSIFIEDS.TERADEX.COM - Science/Tech/Agriculture/Soils
Organizations, Soil Mineralogy, Publications, Soil Morphology, Classificationand Survey, CLASSIFIEDS / Science/Tech / agriculture / soils.
http://classifieds.teradex.com/Science_Tech/Agriculture/Soils/
PRODUCTS.TERADEX.COM - Science/Tech/Agriculture/Soils
Organizations, Soil Mineralogy, Publications, Soil Morphology, Classificationand Survey, PRODUCTS / Science/Tech / agriculture / soils.
http://products.teradex.com/Science_Tech/Agriculture/Soils/
Management Of Organic Inputs In Soils Of The Tropics Intro Page
The Management of Organic Inputs in soils of the Tropics (MOIST) Working Group at Cornell University
http://ppathw3.cals.cornell.edu/mba_project/no_image.html
Biodiversity In Food And Agriculture
the full range of ecosystem services provided by soil biodiversity and associatedsocioeconomic factors and, inviting the Food and agriculture Organisation of
http://www.fao.org/biodiversity/soils_en.asp

Extractions: home Soil biodiversity reflects the variability among living organisms including a myriad of invisible micro-organisms (e.g. bacteria and fungi), micro-fauna (e.g. protazoa and nematodes) meso-fauna (acari and springtails) and the more familiar macro-fauna (e.g.earthworms and termites). Plant roots can also be considered as soil organisms in view of their symbiotic relationships and interactions with other soil components. These diverse organisms interact with one another and with the various plants and animals in the ecosystem forming a complex web of biological activity. Soil organisms contribute a wide range of essential services to the sustainable function of all ecosystems. They act as the primary driving agents of nutrient cycling, regulating the dynamics of soil organic matter, soil carbon sequestration and greenhouse gas emission, modifying soil physical structure and water regimes, enhancing the amount and efficiency of nutrient acquisition by the vegetation and enhancing plant health. These services are not only essential to the functioning of natural ecosystems but constitute an important resource for the sustainable management of agricultural systems. A series of activities on soil biological management and soil biodiversity were initiated by FAO in 2000 through the Netherlands-supported programme on agricultural biodiversity. The aims are: firstly, to increase awareness among the range of stakeholders of soil as a living entity and the importance of soil biodiversity for agricultural systems; and secondly, to catalyse the adoption of improved management practices and production systems to enhance soil biodiversity and its biological activity.
Alberta Agriculture, Food And Rural Development - Soil Resources
Welcome to the Alberta agriculture, Food and Rural Development web site. Ifyour browser cannot view frames, you should download a newer version.
http://www.agric.gov.ab.ca/navigation/sustain/soil/
PowerPoint Presentation - Soils & The Natural Resource Base Of Agriculture
http://www.agron.iastate.edu/initiatives/GASPI/presentations02/GASPI5Burras.htm
PowerPoint Presentation - Soils & The Natural Resource Base Of Agriculture
http://www.agron.iastate.edu/initiatives/GASPI/presentations02/GASPI5Burras_file
Fertilizer Association Of Ireland - Publications - Lime In Irish Agriculture - L
(2) LIME, soils AND SOIL TESTS. Using pH to determine how much lime to usecan lead to overliming in some soils and underliming in other soils.
http://www.fertilizer-assoc.ie/publications/lime_in_ireland/publications_lime_re

Extractions: (2) LIME, SOILS AND SOIL TESTS Soil pH is a measure of the H pH is useful as a measure of the degree of acidity/alkalinity of a soil while the lime requirement is an estimate of the amount of lime required to alter the pH in the soil to a target pH. The pH of the soil can be taken by pH indicators or by pH meters. pH indicators are organic dyes in solution in ethyl alcohol. They change colour depending on pH. A wide pH range can be determined by using a mixture of dyes. These are useful tools for analysis in the field but are restricted in application. They can be helpful in diagnosing the cause of crop failure by checking near the roots of diseased and healthy plants for acidity. They may also be used to decide quickly whether a soil needs lime or not. If the soil is acid a sample should be send to the laboratory for a precise estimate of lime requirement. They can be used to determine the uniformity of an area before taking soil samples. The disadvantages of the indicator are :- A very small sample must be used and it can not therefore be representative.

81-95 of 95 Back | 1 | 2 | 3 | 4 | 5