Institutional Learning and Change: an initiative to promote greater impact through agricultural research for poverty alleviation

The ILAC Initiative consists of an evolving community of individuals committed to increasing the contributions of agricultural research to sustainable poverty reduction around the world. ILAC promotes research, methodology development and capacity development to increase understanding of agricultural change processes and increase the effectiveness of interventions to stimulate pro-poor innovation. This paper presents a broad overview of ILAC, including its background, origins and evolution, objectives and activities. It also presents the initiative’s central hypothesis and a set of guiding questions. Theoretical frameworks that show promise for increasing understanding of issues related to capacities to learn, facilitate innovation, and contribute to poverty reduction are introduced

Fall prevention in the community: what older people say they need

Original article can be found at: http://www.bjcn.co.uk/ Copyright MA HealthcareUptake of and adherence to fall prevention interventions is often poor and we know little about how older people’s perceptions of and beliefs about fall prevention interventions affect uptake. This study aimed to explore older people’s perceptions of the facilitators and barriers to participation in fall prevention interventions. We undertook a qualitative study with older people who had taken part in, declined to participate or adhere to fall prevention interventions using semi-structured interviews (n=65), and 17 focus groups (n=122) with older people (including 32 South Asian and 30 Chinese older people) in primary and community care settings in the South of England. A number of factors acted as either barriers or facilitators to uptake of interventions. Older people also made recommendations for improving access to interventions. Community nurses are ideally placed to screen older people, identify those at risk of falling and refer them to appropriate interventions as well as providing health promotion and education.Peer reviewe

A relativistically covariant version of Bohm's quantum field theory for the scalar field

We give a relativistically covariant, wave-functional formulation of Bohm's quantum field theory for the scalar field based on a general foliation of space-time by space-like hypersurfaces. The wave functional, which guides the evolution of the field, is space-time-foliation independent but the field itself is not. Hence, in order to have a theory in which the field may be considered a beable, some extra rule must be given to determine the foliation. We suggest one such rule based on the eigen vectors of the energy-momentum tensor of the field itself.Comment: 1 figure. Submitted to J Phys A. 20/05/04 replacement has additional references and a few minor changes made for clarity. Accepted by J Phys

As-built design specifications of the LANDSAT Imagery Verification and Extraction System (LIVES). Volume 1: Test and appendices

There are no author-identified significant results in this report

Localized compaction and doming to increase N-use efficiency and reduce leaching

Nitrate-nitrogen leaching from agricultural lands results in inefficient use of nitrogen-fertilizer as well as degradation of groundwater or surface water if leachate returns to the surf ace through artificial drainage or baseflow. Subsurface barriers placed above a fertilizer band have been shown to reduce anion leaching. Laboratory data suggest that compacted soil works well as a subsurface water-flow barrier (Kiuchi et al., 1992; Kiuchi et al., 1994). A field-scale implement has been designed and constructed to inject nitrate-nitrogen fertilizer below the soil surface and create a thin compacted strip of soil above the fertilizer band covered by a small dome of soil. Data from a field study indicate that nitrate-nitrogen placed beneath such a domed, compacted strip is less susceptible to leaching than nitrate-nitrogen placed below the soil surface without such a cover. In 1993, nitrate-nitrogen remaining in the upper soil profile (32 inches deep) after three months of the growing season was 56% of the total amount applied compared with 37% remaining where there was only the typical knife injection band. Grain weight and plant weight at black layer development were not significantly different between the two application methods. Overall grain yields at harvest were different, the conventional knife application technique yielding slightly more than the localized compaction and doming application technique

Soil moisture and evapotranspiration predictions using Skylab data

The author has identified the following significant results. Multispectral reflectance and emittance data from the Skylab workshop were evaluated for prediction of evapotranspiration and soil moisture for an irrigated region of southern Texas. Wavelengths greater than 2.1 microns were required to spectrally distinguish between wet and dry fallow surfaces. Thermal data provided a better estimate of soil moisture than did data from the reflective bands. Thermal data were dependent on soil moisture but not on the type of agricultural land use. The emittance map, when used in conjunction with existing models, did provide an estimate of evapotranspiration rates. Surveys of areas of high soil moisture can be accomplished with space altitude thermal data. Thermal data will provide a reliable input into irrigation scheduling

Soil Water Infiltration as Affected by the Use of the Paraplow

DOUBLE-RING infiltration measurements were made during the corn growing season to determine the effect of various tillage systems on 1- and 30-min cumulative infiltration at three locations in Iowa. The Paraplow*, a newly introduced tillage tool in North America, which loosens the soil but does not invert it, was compared with moldboard-plow, chisel-plow, and no-tillage treatments. The Paraplow treatment gave the highest 1- and 30-min cumulative infiltration throughout the growing season. Similar bulk densities to a depth of 10 cm were observed for all the tillage treatments except for immediately after fall tillage at one site where moldboard-plowed and chisel-plowed soils had the lowest bulk densities. No-tillage and Paraplow treatment plots generally had greater moisture contents in the top 10 cm. Deep, surface connected cracks enhanced soil water infiltration considerably, and residue cover, particularly on the surface of no-tillage and Paraplow treatment plots, seemed to prevent surface sealing that would restrict soil water infiltration