1. Introduction Potatoes can be grown throughout the year in Zambia, except when the country experiences frost (temperatures below 7 ˚C ) which has the potential to slow down growth and kill leaves leading to reduced yield. In Zambia frost is most likely to occur between May and July. 2. Soil Requirements Potatoes can be grown on a variety of soils including clay, sandy and even pure composites, but they perform very well in loamy sandy soils with good drainage and good moisture retention capacity. Whichever type of soil they are planted, it should be tilled to a fine texture to allow air circulation and expansion of tubers. Where possible, it is recommended that soil be disked to loosen and allow it form a fine texture. The soil pH requirement for potatoes is in the range 5 to 6 on the calcium chloride scale. It is recommended that soil testing be carried out to establish the soil pH and make corrections where necessary. Alkaline soils cause potatoes to have scales and rough
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