190 research outputs found
Data for: The Poverty Impacts of Improved Cowpea Varieties in Nigeria: A Counterfactual Analysis
No full textThis data was used to estimate the poverty reducing effects of improved cowpea varieties in Nigeria. It is associated with the manuscript "The Poverty Impacts of Improved Cowpea Varieties in Nigeria: A Counterfactual Analysis"
Welfare impacts of improved groundnut varieties in eastern Zambia: a heterogeneous treatment effects approach
No full textThis paper examines the welfare impacts of improved groundnut varieties in eastern Zambia using data from a survey of over 600 households. We use the stratification-multilevel, matching-smoothing, and smoothing-differencing methods to analyse how treatment effects vary with the propensity to adopt improved groundnut varieties. We find consistent results across the models indicating that crop yields and incomes increase significantly with the propensity to adopt improved groundnut varieties. The results point to the need for policies and strategies that increase access to market information and overcome the constraints to adoption for realising the benefits from improved groundnut varieties in Zambia
Adoption and welfare impacts of multiple agricultural technologies: evidence from eastern Zambia
No full textUsing plot level panel data and multinomial endogenous switching regression, this article analyzes the adoption and welfare impacts of multiple agricultural technologies in eastern Zambia. We adapt a multinomial endogenous switching/treatment effect regression framework to correct for selection bias and endogeneity originating from both observed and unobserved heterogeneity. Results indicate that joint adoption of multiple agricultural technologies had greater impacts on crop yields, household incomes, and poverty than the adoption of individual components of the technology package. Our findings suggest that efforts aimed at raising household incomes and reducing poverty should focus on promoting the adoption of multiple agricultural technologies through provision of improved support services such as extension and input supply
Does cooperative membership increase and accelerate agricultural technology adoption? Empirical evidence from Zambia
No full textIn developing countries, agricultural cooperatives are increasingly being used to promote improved agricultural technologies and alleviate food insecurity and poverty. However, little is known about the role of agricultural cooperatives in accelerating the adoption of improved agricultural technologies. Using a comprehensive balanced household panel and varietal data, this study applied the difference-in-difference model to identify factors affecting farmers? decision to become cooperative members and the impact of cooperative membership on the adoption of improved maize, inorganic fertilizer and crop rotation. Furthermore, the study used the inverse probability weighted regression adjustment model to analyze the impact of cooperative membership on the speed of adoption of improved maize varieties. We found that cooperative membership increased the probability of technology adoption by 11?24 percentage points. Results further indicated that the average time to adoption was about 8 years, but it was shorter for cooperative members. The results showed that, on average, cooperative membership increased the speed of adoption of improved maize by 1.6?4.3 years. Generally, the results suggest the need for policies which promote farmer organizations such as cooperatives coupled with effective extension services for faster and greater adoption of improved technologies
The early Ludfordian leintwardinensis graptolite event and the Gorstian-Ludfordian boundary in Bohemia (Silurian, Czech Republic)
No full textAnwendungstechnik
No full text232 - Verringerung des Feintropfenanteils im Sprühnebel durch ein neues Adjuvant (Synergen® OS) für Standard-und driftreduzierende SpritztechnikReduction of driftable fine spray droplets with a new adjuvant (Synergen OS) for standard and reduced drift spray technologyStephanie Giessler, Bob Condon, Siegfried Staiger, Peter Baur233 - Thermische Unkrautbekämpfung auf Wegen und Plätzen – Prüfeinrichtung zur Bestimmung und Verbesserung der GeräteeffizienzThermal weed control on pavements – test bench for determination and improvement of thermal weed control devicesDetlef Stieg, Arnd Verschwele234 - Bekämpfung des Eichenprozessionsspinners im Urbanen Grün: Vorversuche zum Einsatz der Sprühkanone als Applikationstechnik für Pflanzenschutz- und BiozidanwendungenPest control of the Oak Processionary Moth in urban green: Prior tests using a cannon sprayer as a technique of plant protection and biocide applicationsPatrick Goff, Sven Nolte, Nadine Bräsicke, Matthias Krebs235 - Ecoplug* - ein neues Verfahren zur selektiven Gehölzbekämpfung im ForstEcoplug* – a new method for the selective control of unwanted trees in forestryWolfgang Voegler, Holger Ophoff, Manda Sanso
Adoption and Ex-post Impacts of Improved Cowpea Varieties on Productivity and Net Returns in Nigeria
No full textCowpea covers the largest area of any grain legume in Africa and is especially important in West Africa where Nigeria and Niger alone account for over 75% of the total cowpea production in the world. Despite successes of international and national cowpea improvement research in the development and release of several improved varieties, there is limited empirical evidence of adoption and ex-post impacts of improved cowpea. Using a nationally representative survey data from a sample of 1,525 cowpea-growing households in northern Nigeria cultivating over 2,500 cowpea plots, we assess the adoption and impacts of improved cowpea varieties on cowpea yields, net returns and production costs. We apply a control function approach and propensity score matching models to estimate the causal effects of adoption of improved cowpea varieties. Our results show that 38% of the cowpea plots were planted with improved varieties, and cowpea yields, net returns and production costs increase significantly with the adoption of improved cowpea varieties. Adoption of improved cowpea varieties is associated on average with 26% yield gains, 61% increase in net returns and 14% increase in production costs. We also show that farmers who have a lower propensity to adopt improved cowpea varieties also face higher costs of production
An assesment of factors affecting the performance of agroforestry farmer-to-farmer trainers in Chipata District
No full textThe main objective of this study was to assess the factors that affect the performance of Agroforestry farmer-to-farmer trainers in Chipata district. The study also attempted to establish the total number of farmers trained by the farmer trainers. The data used in the analysis was mainly primary data, which was collected through the use of a semi-structured questionnaire. Since this was cross sectional data, heteroskedasticity was tested using the Breush-Pagan-Godfrey (BPG) test and it was present at 5% level of confidence. Estimated Generalized Least squares (EGLS) method was used to correct for heteroskedasticity. The findings from the study revealed that the factors that affect farmer trainers training activities were farmer trainer house hold labour availability, number of years of being a trainer, sex of the farmer trainer and workshop attendance by the farmer trainer. An increase in amount of household labour available decreased the total number of farmers trained by the farmer trainer, implying a negative relationship. On the other hand a one-year increase in the number of years of being a trainer increased the total number of farmer trained by 21. Male farmer trainers trained on average 9 more farmers than female farmer trainers. The farmer trainers who attended a workshop on average trained 13 more farmers than those who did not. The research results also showed that a total of 2435 farmers were trained out of which 49.6% were male and 50.4% were female. However, It was not out rightly concluded that male farmers are not interested in Agroforestry but this could be attributed to many factors, which may include males being out in town looking for paid jobs leaving women to take care of household activities including farming and other related activities such as Agroforestry. From these findings it was concluded that in order to improve the performance of farmer trainers the factors such as the number of years of being a trainer, sex of the farmer trainer, farmer trainer household labour availability and workshop attendance should be taken into consideration. In light of the findings of the study, some of the recommendations which were made included the need for further training to be given to the farmer trainers so that they can be conversant with new extension methods and technology, a further comprehensive study to look at the characteristics and views of farmers trained , the need to reduce the area covered by the farmer trainers to a manageable size to enable farmer's reach many farmers and also the need to work with experienced farmer trainers who can then train other farmers
Impact of improved maize varieties on food security in eastern Zambia: a doubly robust analysis
No full textThis study investigates the impact of improved maize varieties on household food security in eastern Zambia using household survey data from a sample of over 800 rural households. Since treatment effect estimates are often prone to misspecification in either the treatment or outcome equation, we use the doubly robust inverse probability weighted regression adjustment method, complemented with propensity score matching on six different food security measures to obtain reliable impact estimates. Generally, we find a positive impact of improved maize adoption on food security across the two econometric approaches. Maize being the most important food staple in Zambia has a great bearing on the food security status of farm households. It is therefore imperative that a conducive environment is created that promotes the adoption of maize yield improving technologies
«La mujer que manda en casa» de Tirso de Molina: una descripción barroca de la Jezabel bíblica
No full textLa mujer que manda en casa es una obra de multiplicidad renacentista, fruto de las lecturas bíblicas y hagiográficas de Tirso, de las lecciones de psicología de los místicos y de su fascinación por el modelo teatral diseñado por su maestro, Félix Lope de Vega, considerado el creador del teatro nacional español. Entre ellas se encuentran dos de las más importantes características del arte dramático de este autor: su interés por la religión y su gusto por la sátira política, inherente a su alto espíritu crítico y decisivo en el curso de su vida y de su obra. Este artículo, aparte del análisis argumental y estético de la obra, estudia el versionado de la historia de Jezabel, la psicología de los personajes en sus hechos, los elementos bíblicos que el autor conserva, elimina o modifica y sus objetivos en la elección de este tema en el momento de la Contrarreforma. La mujer que manda en casa is a play of Renaissance multiplicity, a
product of Tirso’s biblical and hagiographic readings, of the lessons of the mystics’
psychology and of his fascination with the theatrical model designed by his peer,
Felix Lope de Vega, considered the creator of the Spanish national theatre. In it we
find two of the greatest characteristics of the dramatic art of this author: his interest
in religion and his taste for political satire, inherent in his overly critical spirit
something decisive in his life and his work. This article, apart from the aesthetic and
structural analysis of the play, studies the version of the story of Jezebel, the psychology
of the characters in their deeds and the biblical elements that the author
retains, eliminates or modifies and his objectives while selecting this topic during
the Counter-Reformatio
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