American Journal of Biological and Environmental Statistics

Archive

Volume 3, Issue 1, March 2017

  • Threats, Use and Management Interventions for Restoration of Lake Chitu West Arsi, Ethiopia

    Girum Faris, Genene Tefera

    Issue: Volume 3, Issue 1, March 2017
    Pages: 1-4
    Received: 26 November 2016
    Accepted: 6 December 2016
    Published: 9 February 2017
    DOI: 10.11648/j.ajbes.20170301.11
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    Abstract: Lake Chitu is one of Ethiopian Flamingo Lakes known by single dominant blue green algal specie called Arthrospira fusiformis. A household questionnaire survey of respondents, key informants and focus group discussion were made in 2012 in Labu Subuqa kebele where lake Chitu is found to see major threats for general ecosystem disturbance, to see the ... Show More
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  • Variance Estimation Using Linear Combination of Tri-mean and Quartile Average

    Showkat Maqbool, Shakeel Javaid

    Issue: Volume 3, Issue 1, March 2017
    Pages: 5-9
    Received: 22 October 2016
    Accepted: 12 January 2017
    Published: 9 February 2017
    DOI: 10.11648/j.ajbes.20170301.12
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    Abstract: In this paper, we have proposed a class of modified ratio type variance estimator for estimation of population variance of the study variable, when Tri Mean and Quartile average of the auxiliary variable are known. The bias and mean square error (MSE) of the proposed estimator are obtained. From the numerical study it is observed that the proposed ... Show More
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  • Role of Agricultural Mechanization Technologies in Transforming Agriculture: The Case of Wheat Row Planter in Ethiopia

    Tamrat Gebiso, Ayalew Bekele, Ephrem Boka

    Issue: Volume 3, Issue 1, March 2017
    Pages: 10-19
    Received: 2 December 2016
    Accepted: 27 December 2016
    Published: 16 February 2017
    DOI: 10.11648/j.ajbes.20170301.13
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    Abstract: Wheat is one of the major staple food crops in many parts of Ethiopia covering about 11% of total land cultivated and production share of 17% of total cereals. However, land productivity is found to be among the lowest in the country from the world which is about 2.01tons/ha. To increase this lowest productivity, among all others, good agronomic pr... Show More
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