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纳米比亚地质概况及矿产资源特征 被引量:7
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作者 李啸 《中国矿业》 北大核心 2016年第S1期52-54,共3页
纳米比亚共和国位于非洲西南部,地处南非以北,安哥拉和赞比亚以南,东与博茨瓦纳相邻,西濒大西洋。纳米比亚成矿地质背景较好,有着丰富的自然资源,在数百种矿藏中,已探明的有60余种。各种矿藏探明储量和产量均居非洲前5名,铀和钻石的开... 纳米比亚共和国位于非洲西南部,地处南非以北,安哥拉和赞比亚以南,东与博茨瓦纳相邻,西濒大西洋。纳米比亚成矿地质背景较好,有着丰富的自然资源,在数百种矿藏中,已探明的有60余种。各种矿藏探明储量和产量均居非洲前5名,铀和钻石的开采在开采业中占据重要位置,整个采矿业的现在及未来都是纳米比亚国家经济中最主要的组成部分。纳米比亚是以下矿产品的重要生产国:钻石、铀、铜、铅、锌、金、石油、天然气等。本文通过搜集资料对纳米比亚的基本地质特征和矿产资源概况进行概述,供有意赴纳米比亚投资矿业者参考。 展开更多
关键词 地质特征 矿产资源 纳米比亚 非洲西南部
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Marketing of African Walnut [Tetracarpidium conophorum Mull. (Arg)] in Southwest Nigeria: Production Issues and Contributions to Stakeholders
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作者 F. D. Babalola 《Journal of Agricultural Science and Technology(B)》 2011年第4期523-531,共9页
The survey was carried out in Ekiti, Oyo, Ogun, Ondo, and Osun states located in SW Nigeria. The respondents for the study include thirty marketers and thirty producers of African walnut randomly selected within each ... The survey was carried out in Ekiti, Oyo, Ogun, Ondo, and Osun states located in SW Nigeria. The respondents for the study include thirty marketers and thirty producers of African walnut randomly selected within each of the state, making a total of 60 respondents per state and 300 for the five states. Two sets of structured questionnaires were designed, one for each eatergory of the respondents. The questionnaires were designed to solicit information on demographic characteristics of the producers and marketers of African walnut, production and marketing challenges of the walnut, price trend along the marketing chain, and interraction and relationships of the middlemen. The questionnaires were administered through individual and focus group methods. Also, indepth interview of the respondents was conducted to supplement data obtained from the questionnaires. Purposive sampling method was used to select local markets where the walnut were sold for study of the price trend of the walnut for two seasons (from 2007 to 2008). Marketing of the walnut started with farmers that plant the perennial climber on their farmland, while the marketing intermediaries include the village merchants, wholesalers, and the retailers. Adult male dominated the production sector of African walnut while processing and marketing the nuts were mostly done by the women and children. There is high demand for the walnut as delicacy and snack; although industrial usage is yet to be fully developed. Marketing of the cooked nuts and at retail quantity had the highest profit along the marketing chain. There is need for expansion of the current scale of production of the walnut to meet increasing demand. Provision of appropriate storage facilities to prevent spoilage of the product in rural areas and good rural road network for easy conveyance to urban markets where it is majorly consumed is pertinent for marketing of the walnut. 展开更多
关键词 Africa walnut marketing chain selling price retail quantities wholesaler village merchant storage facility.
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