Practical Answers

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  Solar Photovoltaic Energy

  This Technical Brief looks at the background of solar photovoltaic (PV) energy (in which sunlight is directly converted into electricity), the design of PV cell, modules and arrays, and configuration of PV systems.

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  Mushroom Growing

  Developing commercial cultivation of mushrooms is growing throughout Africa. This brief focuses on this practice in Zimbabwe.

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  Solar Drying

  Drying using sunshine - a brief description of the basic principles behind it and how to determine the rate of drying.

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  Ginger Processing

  Ginger is valued for the dried ginger spice and preserved, crystallised ginger.

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  Fruit Preserves - Jams, Jellies and Marmalades

  An introduction to small-scale jams, jellies and marmalades making, Known collectively as preserves.

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  Guideline for Building Power Thresher

  Step by step pictorial description of how to build a power thresher cost effectively.

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  Making Stabilised Soil Blocks

  Deals with the two main problems that can arise with earth buildings: stabilisation and compaction.

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  Pepper Processing

  Pepper processing looks at the main post harvest activities. These activities include sorting, threshing and drying.

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  Clove Processing

  Cloves are the unopened flower buds of the evergreen tree and are used to flavour foods and drinks. They are also used to produce essential oil used in dentistry and as a cleaning agent in microscopy. The steps in obtaining and processing it are shown here.

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  Promoting Local Innovation in Sudan

  The aims of this publication are to focus on the collection and classification of Sudanese local innovations using a "bottom-up" approach, to take into account the historical depth and the potential use that may highlight the continuity and changes in local innovations as indicators of society trans...