Rapid soil analytical techniques for international agricultural research and development

Soil analysis is used to assess natural resources and inform management to improve long-term farming profitability. Conventional techniques typically use different methods, equipment, reagents and skills to measure each soil property of interest. The consequence is that a conventional soil laboratory is expensive to set up, maintain and run. These issues result in many countries (and organisations) having to do without a well-functioning conventional soil laboratory. Developments in spectroscopic and potentiometric methods of soil analysis means that these countries need not go without reliable soil analysis

Raising irrigation productivity and releasing water for intersectoral needs (RIPARWIN): RIPARWIN final technical report

River basinsHydrologyRiver basin managementRiver basin developmentDevelopment projectsWater allocationIrrigation waterProductivityIrrigation managementRiceTanzaniaGreat Ruaha River BasinUsangu River Basin

Decay of escherichia coli in soil following the application of biosolids to agricultural land

The decay of Escherichia coli in a sandy loam soil, amended with enhanced and conventionally treated biosolids, was investigated in a field experiment following spring and autumn applications of sewage sludge. Control soils, without the application of biosolids, were also examined to determine the background indigenous populations of E. coli which are present in the environment. The survival of indigenous E. coli and populations of E. coli applied to soil in biosolids, is assessed in relation to environmental factors influencing pathogen-decay processes in soil

Trade-Offs Between Agricultural and Chemical Policy

In modern U.S. agriculture there are numerous tradeoffs between agricultural and chemical policies. Chemicals are major inputs in agricultural production processes (for both crops and livestock). Agricultural chemicals, however, have negative environmental side effects that are not always considered by users (Benbrook 1988). Agricultural policies primarily are designed to stabilize commodity prices and enhance farm income, which in turn changes production levels, provides incentives for different intensities of factor use, and influences the loading of chemicals. In turn, chemical policies involving taxes, use restrictions, and registration requirements change the availability and prices of chemical inputs, alter agricultural production and cost levels, and affect agricultural income

Case Studies and the Teaching of Development

SUMMARY Case studies come in several forms and can be used for different pedagogic and academic purposes. The authors examine the role of case study in development studies teaching, reviewing definitions and actual usages. The experience of Harvard in the 1920s and 1930s is considered since there are parallels between business studies then and development studies today. Three dimensions of case study (not always clarified in the literature) relevant for development studies are considered: case study as a teaching method, particularly for small groups; case study as research activity; and case study and the process of generalisation in an interdisciplinary study area. The general argument is that there are good reasons for using case study, but for successful transcultural teaching, more attention needs to be given to educational issues where case study is used with students from a variety of different economic and cultural backgrounds. RESUME Les études de cas et l'enseignement du développement Les études de cas se présentent sous diverses formes et peuvent être utilisées à des fins pédagogiques et académiques différentes. Les auteurs examinent le rôle de l'étude de cas dans l'enseignement des études sur le développement, en passant en revue les définitions et les utilisations actuelles. Ils s'intéressent à l'expérience de Harvard dans les années 20 et 30 car il y a des parallèles entre les études de gestion d'alors et les études sur le développement d'aujourd'hui. Trois dimensions de l'étude de cas (pas toujours expliquées dans les textes) s'appliquant aux études sur le développement sont examinées ici: l'étude de cas en tant que méthode d'enseignement, en particulier pour les petits groupes; l'étude de cas en tant qu'activité de recherche; et l'étude de cas et le processus de généralisation dans un domaine d'étude interdisciplinaire. L'argument général est qu'il y a de bonnes raisons pour utiliser l'étude de cas, mais pour un bon enseignement transculturel, il faut prêter davantage d'attention aux problèmes d'éducation lorsque l'étude de cas est utilisée avec des étudiants venant de milieux culturels et économiques divers. RESUMEN Estudios de casos típicos y la enseñanza del desarrollo Los estudios de casos típicos se presentan de varias formas y se pueden utilizar para diversos fines pedagógicos y académicos. Los autores examinan la función del estudio de casos en la enseñanza de estudios sobre el desarrollo, reseñando las definiciones y las aplicaciones efectivas. Se considera la experiencia de Harvard en los decenios de 1920 y 1930, ya que existen similitudes entre los estudios sobre negocios en aquella época y los estudios sobre el desarrollo en la actualidad. Se consideran tres dimensiones del estudio de casos (no siempre puestas en claro en nivel informativo) que están relacionados con los estudios sobre el desarrollo: el estudio de casos típicos como método de enseñanza, especialmente para grupos pequeños; el estudio de casos típicos como actividad de investigación; y el estudio de casos típicos y el proceso de generalización en una esfera de estudios entre disciplines. El argumento general es que hay buenos motivos para utilizar el estudio de casos típicos, pero para que la enseñanza de las relaciones culturales recíprocas tenga éxito se tiene que prestar mayor atención a los aspectos docentes cuando el estudio de casos típicos se utilice con estudiantes de diversas procedencias culturales y económicas