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Glenn Hyman's Library tagged environment →  View Popular

06 Mar 09

National Collection of Imperiled Plants

some stuff on an endangered wild relative of cassava....this has properties that give cassava longer shelf life

www.centerforplantconservation.org/...CPC_ViewProfile.asp - Preview

cassava Texas wild relative manihot Environment Cassava Africa

03 Mar 09

Stategies for controlling CMD

  • assava mosaic disease (CMD) is caused by whiteflyborne viruses of the genus Begomovirus (family Geminiviridae). The disease has long been regarded as the most important of those affecting cassava in sub-Saharan Africa, and has been the subject of much research, especially since the onset of the current very damaging pandemic in eastern and central Africa. This review considers the main features of CMD and the various possible means of control. The main emphasis to date has been on the development and deployment of virus-resistant varieties. These are widely adopted in countries where CMD has caused serious problems, and provided a powerful incentive for farmers to abandon some of the most susceptible of their traditional varieties. Only limited use has been made of phytosanitation involving CMD-free planting material and the removal (roguing) of diseased plants. Cultural methods of control using varietal mixtures, intercrops or other cropping practices have also been neglected, and there is a need for much additional research before they can be deployed effectively. Nevertheless, the severe losses now being caused by CMD in many parts of sub-Saharan Africa could be greatly decreased through the application of existing knowledge.
14 Nov 08

Editorial Observer - Map Upon Map - New Dimensions in What Maps Can Do - NYTimes.com

I started using GIS in 1988. This guy is just now discovering what some of us have known for 20 years or more. I like the discussion of how we think about the environment around us. In GIS, this is topology, something that many users of the technology may

www.nytimes.com/...12wed4.html - Preview

GIS geography topology environment spatial maps Geography

  • I could, if I put my mind to it, lay down a map of all the fencing on my farm, where the posts stand, where the wires intersect, where the electricity enters and where the repairs are needed. I could map out the circular spots where the pigs have lived over the years, as if they were ancient settlements. But in the end I would only be mapping it for myself, and the map I need is already in my head.
30 May 08

Peru's Guano Trade - > Slide Show

Great slide show (and article) on guano en Peru....with references to anchovies, high food prices, urea, natural enemies, high oil prices, organic food....all related to birdshit....

www.nytimes.com/...20080529PERU_index.html - Preview

guano Peru fertilizer urea prices Consumer Environment Conservation

16 Dec 07

Chinese fish farmers face polluted waters - International Herald Tribune

  • growth is threatened by the two most glaring environmental weaknesses in China: acute water shortages and water supplies contaminated by sewage, industrial waste and agricultural runoff that includes pesticides. The fish farms, in turn, are discharging wastewater that further pollutes the water supply.
19 Nov 07

Paying farmers to protect the environment?

  • Carefully targeted payments to farmers could serve as an approach to protect the environment and to address growing concerns about climate change, biodiversity loss and water supply, FAO said today in its annual publication The State of Food and Agriculture.
16 Nov 07

Determination of Deforestation Rates of the World's Humid Tropical Forests -- Achard et al. 297 (5583): 999 -- Science

  • A recently completed research program (TREES) employing the global imaging capabilities of Earth-observing satellites provides updated information on the status of the world's humid tropical forest cover.
14 Nov 07

Map Index | World Soil Resources | NRCS Soils

  • All global maps shown here are drafts. Your opinions/criticisms are welcome. Send comments to paul.reich@wdc.usda.gov.

Land Degradation: An overview | NRCS Soils

  • Land degradation will remain an important global issue for the 21st century because of its adverse impact on agronomic productivity, the environment, and its effect on food security and the quality of life. Productivity impacts of land degradation are due to a decline in land quality on site where degradation occurs (e.g. erosion) and off site where sediments are deposited.

Land Resource Stresses and Desertification in Africa | NRCS Soils

  • Vulnerability to desertification in Africa is assessed using the information on soils, climate, and the previously evaluated land resource stresses. Desertification is, "land degradation in arid, semi-arid, and dry sub-humid areas resulting from various factors, including climatic variations and human activities". Excluded in the definition are areas that have a hyper-arid or a humid climate. The GIS Desertification Vulnerability map was coupled to an interpolated population density map to obtain estimates of the number of persons affected by desertification. Desertification processes affect about 46% of Africa. The significance of this large area becomes evident when one considers that about 43% of the continent is characterized as extreme deserts (the desert margins represent the areas with very high vulnerability). Only about 11% of the land mass is humid and by definition is excluded from desertification processes. There are about 2.5 million km2 of land under low risk, 3.6 million km2 under moderate risk, 4.6 million km2 under high risk, and 2.9 million km2 under very high risk. The region that has the highest propensity is located along the desert margins and occupies about 5% of the land mass. It is estimated that about 22 million people (2.9% of the total population) live in this area. The low, moderate, and high vulnerability classes occupy 14, 16, and 11% respectively and together impact about 485 million people.
28 Oct 07

Cambodia Atlas

Lots of data here on Cambodia....not sure if you can easily download it, but there is lots....

cambodiaatlas.com/map - Preview

Cambodia atlas gis data Southeast Asia Geography GIS Environment Development

13 Sep 07

China urged to join sustainable soy efforts in the Amazon

  • Brazilian soy crushers have urged China to join an alliance to promote sustainable soybean production in the Amazon, according to Reuters.
10 Sep 07

Can remittances and globalization help the environment?

New research report from Susana Hecht, including environmental services, conservation, forest recovery, etc.

news.mongabay.com/...0905-remittances.html - Preview

El Salvador forests conservation environmental services Amazon Environment Water

05 Sep 07

Amazon River in Peru falls to second lowest level on record

  • The Amazon River in Peru has fallen to its second lowest level on record according to the Peruvian Navy's Hydrographic and Navigation Service. The Navy reported that river levels stand at 107.30 meters above sea level. In September 2005, river levels were 106.08 meters above sea level.
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