Farmers also grow sweet potato has a low output due to improper handling of soil fertilizer to grow varieties that fertilizer is one important factor that enhances productivity and quality of sweet potato. Fertilizer application to meet the needs of potato planting in rice, he surely must have a quantity of fertilizer which is required is different from a regular wake conditions and may be varied in each species. Thus, the technology to the analysis of fertilizer is one way to increase productivity and quality, value for money, and no more than necessary. Department of agriculture, agricultural research and Development Center, pichit had beef potato breeding purple phot. 65-3. Head shape: the flesh and the skin is red, yaori purple, size 3.5 cm, width length average of 13.6 cm age harvest 90-110 days, average productivity 2100 kg per Rai (Office of research and development, agriculture, municipal 2, 2554) is a species with the potential to compete in the market, but a market need is met, use the comparison with appropriate fertilizer combined with varieties of farmers and fertilizer application according to the way in which agriculture and resource extraction in the original batayu. As an alternative to the use of fertilizer in the Don to increase productivity, increase income of farmers.
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