Potatoes promote sweet potatoes
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CTA. 1995. Potatoes promote sweet potatoes. Spore 55. CTA, Wageningen, The Netherlands.
Permanent link to cite or share this item: http://hdl.handle.net/10568/49560
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Sweet potatoes, because they are labour intensive and difficult to process after harvesting, have declined in popularity. However, intercropping them with ordinary (Irish) potatoes helps to reduce labour costs. Since the International Potato Centre...
Sweet potatoes, because they are labour intensive and difficult to process after harvesting, have declined in popularity. However, intercropping them with ordinary (Irish) potatoes helps to reduce labour costs. Since the International Potato Centre (CIP) took over the responsibility for developing sweet potatoes within the CGIAR, there has been a concerted effort to encourage more farmers to grow the crop again. New varieties have been developed that yield more, have higher dry matter and store better. The Southeast Asian Programme for Potato Research and Development (SAPPRAD) is involving farmers more closely in the selection of new varieties by getting new material onto farms within a year or two, instead of waiting five or six years before the varieties are proven. This closer involvement of farmers is also helping SAPPRAD to get new growing methods adopted. One system involves intercropping potatoes with sweet potatoes. The potato crop is planted and ridged up; 30 days later sweet potatoes are planted in the furrows. The potatoes are harvested after about 70 days. This operation also ridges up the sweet potatoes. The sweet potato foliage is advantageous to the potatoes because it shades the soil, keeping it about 2\B0C cooler. The sweet potatoes also benefit from residual fertilizer. SAPPRAD estimate the cost of growing sweet potatoes in this way is about one US cent per kilogram SAPPRAD PO Box 933 Manila PHILIPPINES
SubjectsCROP PRODUCTION AND PROTECTION;
- CTA Spore (English)