834 resultados para Pihlaja, Juha: Learning in and for production
Resumo:
The presented thesis considered three different system approach topics to ensure yield and plant health in organically grown potatoes and tomatoes. The first topic describes interactions between late blight (Phytophthora infestans) incidence and soil nitrogen supply on yield in organic potato farming focussing in detail on the yield loss relationship of late blight based on results of several field trials. The interactive effects of soil N-supply, climatic conditions and late blight on the yield were studied in the presence and absence of copper fungicides from 2002-2004 for the potato cultivar Nicola. Under conditions of central Germany the use of copper significantly reduced late blight in almost all cases (15-30 %). However, the reductions in disease through copper application did not result in statistically significant yield increases (+0 – +10 %). Subsequently, only 30 % of the variation in yield could be attributed to disease reductions. A multiple regression model (R²Max), however, including disease reduction, growth duration and temperature sum from planting until 60 % disease severity was reached and soil mineral N contents 10 days after emergence could explain 75 % of the observed variations in yield. The second topic describes the effect of some selected organic fertilisers and biostimulant products on nitrogen-mineralization and efficiency, yield and diseases in organic potato and tomato trials. The organic fertilisers Biofeed Basis (BFB, plant derived, AgroBioProducts, Wageningen, Netherlands) and BioIlsa 12,5 Export (physically hydrolysed leather shavings, hair and skin of animals; ILSA, Arizignano, Italy) and two biostimulant products BioFeed Quality (BFQ, multi-compound seaweed extract, AgroBioProducts) and AUSMA (aqueous pine and spruce needle extract, A/S BIOLAT, Latvia), were tested. Both fertilisers supplied considerable amounts of nitrogen during the main uptake phases of the crops and reached yields as high or higher as compared to the control with horn meal fertilisation. The N-efficiency of the tested fertilisers in potatoes ranged from 90 to 159 kg yield*kg-1 N – input. Most effective with tomatoes were the combined treatments of fertiliser BFB and the biostimulants AUSMA and BFQ. Both biostimulants significantly increased the share of healthy fruit and/or the number of fruits. BFQ significantly increased potato yields (+6 %) in one out of two years and reduced R. solani-infestation in the potatoes. This suggests that the biostimulants had effects on plant metabolism and resistance properties. However, no effects of biostimulants on potato late blight could be observed in the fields. The third topic focused on the effect of suppressive composts and seed tuber health on the saprophytic pathogen Rhizoctonia solani in organic potato systems. In the present study 5t ha-1 DM of a yard and bio-waste (60/40) compost produced in a 5 month composting process and a 15 month old 100 % yard waste compost were used to assess the effects on potato infection with R. solani when applying composts within the limits allowed. Across the differences in initial seed tuber infestation and 12 cultivars 5t DM ha-1 of high quality composts, applied in the seed tuber area, reduced the infestation of harvested potatoes with black scurf, tuber malformations and dry core tubers by 20 to 84 %, 20 to 49 % and 38 to 54 %, respectively, while marketable yields were increased by 5 to 25 % due to lower rates of wastes after sorting (marketable yield is gross yield minus malformed tubers, tubers with dry core, tubers with black scurf > 15% infested skin). The rate of initial black scurf infection of the seed tubers also affected tuber number, health and quality significantly. Compared to healthy seed tubers initial black scurf sclerotia infestation of 2-5 and >10 % of tuber surface led in untreated plots to a decrease in marketable yields by 14-19 and 44-66 %, a increase of black scurf severity by 8-40 and 34-86 % and also increased the amount of malformed and dry core tubers by 32-57 and 109-214 %.
Resumo:
Seed is the basic input to crop production. Farmer-based seed production as an alternative agricultural technology transfer is increasingly given especial attention in developing countries where food insecurity is critical. This paper aims to assess the seed production and dissemination strategy among smallholder farmers in eastern Ethiopia that has been introduced by Hararghe Catholic Secretariat (a Non-GovernmentalOrganization). A survey of 160 households in four administrative districts and focus group discussions were used to collect data. While narratives helped understand the process, logistic regressionwas used to identify determinants of land allocation to seed production. Results indicate the crucial role of informal networks and social capital as facilitators of access to production inputs, information and knowledge. The informal seed supply system initiated by the NGO has a huge potential to benefit smallholder farmers by improving their access to higher-yielding varieties of various crops, thereby contributing to an increase in their wellbeing. However, the traditional practice of seed exchange, influenced by social relations, will remain uneconomical to seed producers. Thus, the paper suggests that this potential can be further exploited if some preconditions such as establishment of seed banks, investment in human capital, removal of the underlying constraints and creation of reliable seed markets are given emphasis.
Resumo:
Resumen tomado de la publicaci??n
Resumo:
The UK Professional Standards Framework (UK PSF) for teaching and supporting learning, launched in February 2006, is a flexible framework which uses a descriptor-based approach to professional standards. There are three standard descriptors each of which is applicable to a number of staff roles and to different career stages of those engaged in teaching and supporting learning. The standard descriptors are underpinned by areas of professional activity, core knowledge and professional values. The framework provides a reference point for institutions and individuals as well as supporting ongoing development within any one standard descriptor.
Resumo:
This is a part of a collection of materials developed by the HEAcademy Subject Centre for Languages, linguistics and area studies. The materials provide reflective activities designed to engage teachers with some of the key issues in working with international students and practical ideas for ways in which these can be addressed. They will be of particular interest to new staff or anyone new to working with international students.
Resumo:
Este texto proporciona detallados consejos prácticos y sugerencias para los educadores de escuelas pertenecientes a comunidades muy diversas, culturalmente y lingüísticamente. Algunos capítulos se centran en las necesidades de los estudiantes de comunidades de inmigrantes, especialmente los que están aprendiendo la lengua de enseñanza, aunque también se incluyen otros grupos minoritarios.
Resumo:
Una guía para los profesores de idiomas con diferentes metodologías y técnicas utilizadas en la enseñanza del Aprendizaje Integrado de Conocimientos Curriculares y Lengua Extranjera (AICLE). Ofrece ideas y sugerencias prácticas sobre lo que funciona en el aula, explicaciones y ejemplos de cómo utilizar AICLE en la enseñanza primaria, secundaria y profesional para contribuir a conseguir el plurilingüismo.
Resumo:
Ayuda a entender las formas de aplicación de los dilemas en el marco del aprendizaje de las humanidades en secundaria. Esta técnica introduce instrumentos que ayudan a los estudiantes a practicar y desarrollar habilidades para la reflexión, la investigación y el pensamiento lógico y analítico, que les permiten tomar decisiones sabias en sus vidas. El trabajo con los dilemas, también mejora las aptitudes sociales de los alumnos y su aptitud para trabajar en grupo de manera eficaz; les facilita el desarrollo de otras capacidades como el pensamiento creativo y el razonamiento que pueden utilizar en otras asignaturas y, asimismo, colabora en su desarrollo profesional.
Resumo:
Resumen basado en el de la publicación
Resumo:
Manual que tiene como objetivo ayudar en la formación inicial del profesorado. Ofrece a los profesores en prácticas, las bases de una buena comprensión teórica y la oportunidad de entender e implementar una serie de estrategias en el aula para mejorar la calidad de la enseñanza, con el fin de promover un aprendizaje con éxito. Se dan ejemplos en una amplia gama de entornos educativos y de los problemas a que se enfrentan los maestros en los roles modernos de enseñanza.
Resumo:
Libro dirigido a la figura del HLTA (Higher Level Teaching Assistant) con el objetivo de proporcionar una guía práctica, ideas y material de apoyo para el desarrollo de un trabajo eficaz con los alumnos, los profesores, los padres y el resto de profesionales implicados en el bienestar de los niños. Incluye ejemplos reales de buenas prácticas, una base sobre pedagogía y sobre el rol de los profesores y HLTAs como creadores de ambientes productivos para el aprendizaje, y trata aspectos como la gestión de las clases y las interrelaciones con los alumnos, el papel del HLTA en la comunidad educativa y su desarrollo profesional.
Resumo:
Resumen basado en el de la publicación
Resumo:
Resumen basado en el de la publicaci??n
Resumo:
This paper is a review of a study to evaluate the usefulness of a laboratory approach to auditory training with hearing impaired children.