Exploration and Environmental Exploitation (1908 â€“ 2008)
On the matched pairs sign test using bivariate ranked set sampling: an application to environmental issues
The matched pairs sign test using bivariate ranked set sampling (BVRSS) is introduced and investigated. We show that this test is asymptotically more efficient than its counterpart sign test based on a bivariate simple random sample (BVSRS). The asymptotic null distribution and the efficiency of the test are derived. The Pitman asymptotic relative efficiency is used to compare the asymptotic performance of...
Traditional strategies used by pastoralists to cope with la nina induced drought in Kajiado, Kenya
Pastoralists traditionally relied on herd mobility to cope with drought. In the pastoral areas of Kajiado, Kenya this strategy is now threatened by increased individual land ownership as compared to communal access. Drought frequency as related to El-Nino and Southern Oscillation (ENSO) is predicated to increase with climate change. The aim of the study was investigate the use of herd mobility strategy...
Growth characteristics of two tropical forest species Warburgia ugandensis and Polyscias fulva seedlings grown under contrasting light conditions
Growth parameters for seedlings of two forest trees, Warburgia ugandensis andPolyscias fulva, were measured under various light growth conditions. Leaf area and plant height were significantly higher under low light (< 42% full sunlight) than high light (65% of sunlight) growth conditions (P<0.001). Plant leaf area ranged from 238 cm² under full sunlight to 376 cm² under dense...