Abstract
Selection of the best land for pyrethrum cultivation and determination of the production limiting factors are done through a qualitative process of matching land characteristics with the crop requirements using a model PYCULT built in the Automated Land Evaluation System (ALES). Climatic, soil and landform requirements for pyrethrum cultivation are provided. Climatic and land suitability maps are presented. About 42% of the land under study was found to be suitable for growing pyrethrum. Five percent of the area is highly suitable, the rest has limitations of some kind. Land with very severe limitations owing to soil erosion hazard and soil wetness make up 5% and 3%, respectively. Moderate and severe climatic limitations affect about 7% and 11% of the land, respectively. The small scale maps and the land attributes used render PYCULT useful to land-use planners and researchers at the national level. The results can be employed by land-use planners to select areas suitable for pyrethrum cultivation and by researchers to focus on more detailed research in areas of varying suitabilities. At the farmers' level, PYCULT can be used, provided more detailed local information on climate and soils is available.
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