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超大面积屋顶绿化在北京地铁10号线万柳车辆段的应用 被引量:3
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作者 周瑞 张欣蕊 《铁道标准设计》 2008年第12期97-99,共3页
简要介绍超大面积屋顶绿化在北京地铁10号线万柳车辆段的应用和设计、施工时的重难点。选取屋顶荷载与安全、屋顶防水、屋顶排水、种植物选择等四个方面详细介绍了设计时的考虑和比较;另外以种植土回填工程和屋顶乔木种植工程为例,分析... 简要介绍超大面积屋顶绿化在北京地铁10号线万柳车辆段的应用和设计、施工时的重难点。选取屋顶荷载与安全、屋顶防水、屋顶排水、种植物选择等四个方面详细介绍了设计时的考虑和比较;另外以种植土回填工程和屋顶乔木种植工程为例,分析了屋顶绿化在施工时的重难点。 展开更多
关键词 北京地铁10号线 车辆段 屋顶绿化 屋顶防水 屋顶排水 种植物选择
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Tobacco Production Baseline Survey in Serengeti, Tarime and Rorya Districts, Mara Region
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作者 Nicholaus Musimu Kuboja Asheri Mwamba Kalala +1 位作者 Jacob Bulenga Lisuma Mariam Mrutu 《Journal of Agricultural Science and Technology(B)》 2012年第4期471-481,共11页
Using 2009/2010 cropping season survey data from 181 randomly selected smallholder tobacco farmers, this study provides baseline information on tobacco farming in Mara region. Both descriptive and inferential statisti... Using 2009/2010 cropping season survey data from 181 randomly selected smallholder tobacco farmers, this study provides baseline information on tobacco farming in Mara region. Both descriptive and inferential statistics were employed in data analysis. Result indicates that farmers adopted tobacco farming from tobacco farmers in Kenya. Drought and inadequate supply of inputs were identified as the major production constraints. Others were incidence of pests and diseases, shortage of fire woods, poor extension services and hailstones. Low selling price and contradicting grading systems were the major tobacco marketing constraints. The study also revealed that access to extension services was similar across study districts with over 65.7% of the respondents accessing technical expertise mainly from Alliance One Tanzania employees. Given the positive and negative impacts of tobacco farming, majority of the respondents (95.6%) still were willing to proceed with tobacco farming as their main source of income. However, watermelon, maize and sunflower were ranked as first priority alternative cash crops to tobacco in Serengeti, Tarime and Rorya districts, respectively. This study concludes that tobacco farming still is the main household income source; hence, more investment is required to ensure sustainable economic develooment of rural communities in Mara reeion. 展开更多
关键词 BASELINE MARKETING production tobacco.
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