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This report assesses the economic impacts of climate change on agriculture in Zambia, using the Ricardian method. A multiple linear regression model with net revenue per hectare as response variable has been fitted with climate, hydrological, soil, and socioeconomic variables as explanatory variables. There is one main cropping season in Zambia, lasting from November to April. Crop production in this period depends solely on rains. Considering crop progression in three stages-germination,...

The detailed analysis of current cropping areas in Africa presented here reveals significant climate sensitivities of cropland density and distribution across a variety of agro-ecosystems. Based on empirical climate-cropland relationships, cropland density responds positively to increases in precipitation in semi-arid and arid zones of the sub-tropics and warmer temperatures in higher elevations. As a result, marginal increases in seasonal precipitation lead to denser cropping areas in arid...

This study uses the Ricardian approach to examine the economic impact of climate change on agriculture in Zimbabwe. Net farm revenue is regressed against various climate, soil, hydrological and socio-economic variables to help determine the factors that influence variability in net farm revenues. The study is based on data from a survey of 700 smallholder farming households interviewed across the country. The empirical results show that climatic variables (temperature and precipitation) have...

This paper summarizes the methods and findings of the hydrological assessment component of the project studying likely impacts of climate change on water resources and agriculture in Africa. The first phase of the study used a version of a conceptual rainfall-runoff model called WatBal (Water Balance) applied to gridded data to simulate changes in soil moisture and runoff across the whole continent of Africa rather than to any particular catchment or water resource system. The model inputs...

Previous Ricardian analyses of agriculture have either omitted irrigation or treated irrigation as though it is exogenous. In practice, it is a choice by farmers that is sensitive to climate. This paper develops a choice model of irrigation in the context of a Ricardian model of cropland. The authors examine how climate affects the decision to use irrigation and then how climate affects the net revenues of dryland and irrigated land. This Ricardian 'selection' model, using a modified Heckman...

This paper uses quantitative methods to examine the way African farmers have adapted livestock management to the range of climates found across the African continent. The authors use logit analysis to estimate whether farmers adopt livestock. They then use three econometric models to examine which species farmers choose: a primary choice multinomial logit, an optimal portfolio multinomial logit, and a demand system multivariate probit. Comparing the results of the three methods of estimating...

This paper develops the structural Ricardian method, a new approach to modeling agricultural performance using cross-sectional evidence, and uses the method to study animal husbandry in Africa. The model is intended to estimate the structure beneath Ricardian results in order to understand how farmers change their behavior in response to climate. A survey of over 5,000 livestock farmers in 10 countries reveals that the selection of species, the net income per animal, and the number of...

This study aimes at investigating the level of practice of supervisory competences for the secondary school principals in the light of the variables of: (gender, scientific qualifications, experience, and the directory) from the teachers' perspectives in the northern Governates of Palestine. The study's sample consisted of (250) teachers, selected randomly to represent (5%) of the study population (3913) teachers in the scholastic year 2005/2006. To accomplish the study's objectives, the...

Objectives: To assess the nutrition status among school age children in a rural community. Design: A cross sectional anthropometric survey. Setting: Mpwawa rural district, Central Tanzania. Methods: 639 children from ten randomly selected primary schools and 195 out-of-school children living close to the selected schools were included in the survey. Nutrition status was assessed using anthropometric indicators of Body Mass Index-for-age (BMI-for-age), weight-for-age (wt/age) and height-for...

Eritrean higher education faced numerous challenges over many years. It was particularly suffered during the colonial periods. Eritrea exerted its efforts to develop its dilapidated educational system with the advent of its independence. Eritrea celebrated its sixteenth birthday recently. However, the educational challenges in higher education still remain high. The government of Eritrea established different colleges in different administrative regions. The University of Asmara is the only...

Abstract Findings related to the background knowledge, writing, and reading of disadvantaged students in a South African university geography department are discussed. The notion “academic discourse community” is used as an analytical framework. Findings indicate that students and instructors alike face several extreme challenges.

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 44, Issue 6 p. 17436A-17436C ECONOMIC TRENDS LESOTHO: Severe Drought First published: 06 August 2007 https://doi.org/10.1111/j.1467-6346.2007.01037.xCitations: 1Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of...

Mutations in the connexin 26 gene (GJB2), which encodes a gap-junction protein expressed in the inner ear, have been shown to be responsible for a major part of autosomal recessive non-syndromic hearing loss in Caucasians. The aim of our study was to determine the prevalence and spectrum of GJB2 mutations, including the (GJB6-D13S1830) deletion, in Moroccan patients and estimate the carrier frequency of the 35delG mutation in the general population.Genomic DNA was isolated from 81 unrelated...

This quasi-experimental study compared the relative efficacy of teacher instructions alone, peer education alone, and a combination of these two on reproductive health knowledge, attitude, perceived self-efficacy and sexual practices among secondary schools students in the Ibarapa district of Southwestern Nigeria. A baseline questionnaire was administered to a systematic sample of students in four schools that were randomized into four treatment arms: teacher instructions alone (E1), peer...

In this study, 152 students (90 males & 62 females) of primary (5th & 6th grades, 52 males & 30 females) and preparatory (1st & 2nd grades, 38 males & 32 females) schoolchildren of different age and sex group inhabited in two endemic villages with Schistosoma mansoni in Taiz Govenorate were examination. The highest prevalence and intensity of S. mansoni were-among males at the age group from 10 - < 12 years. A significant relationship was recorded between prevalence and intensity of...

In this study, 152 students (90 males & 62 females) of primary (5th & 6th grades, 52 males & 30 females) and preparatory (1st & 2nd grades, 38 males & 32 females) schoolchildren of different age and sex group inhabited in two endemic villages with Schistosoma mansoni in Taiz Govenorate were examination. The highest prevalence and intensity of S. mansoni were-among males at the age group from 10 - < 12 years. A significant relationship was recorded between prevalence and intensity of...