the technical efficiency involved in cocoa production in cross river state was estimated using the stochastic frontier production function analysis. the effects of some selected socio- economic characteristics of the farmers on the efficiency indices were also estimated. the study relied upon primary data generated from interviewing cocoa farmers using a set of structured questionnaire. a multi...

The Jinzhuping and Changkeng granites are related to the Helong W–Sn ore field in southern Jiangxi Province, China. Three different phases can be found pluton, their LA-ICP-MS zircon U–Pb ages 155.2 ± 0.68 Ma, 154.0 0.56 153.4 0.99 respectively, indicating two types of granitic rocks. All have similar geochemical characteristics, they high contents SiO2 (73.99 wt.%–77.68 wt.%), total alkali (7....