Abstract
Cangkringan Subdistrict is one of areas in Southern flank of Mount Merapi, Special Region of Yogyakarta which is prone to eruptions. Landuse changes due to eruptions often occur in this area. As a result, the Cangkringan area is prone to food security, due to the damage and landuse changes that have occurred. Yam is a tuber crop that is resistant to nutrient-poor land and has not been widely cultivated. The prospect of developing Yam is very large as a way of diversifying food. Therefore, an effort is needed to evaluate the land for cultivation of Yam on marginally lands affected by the eruption by determining the characteristics of the land as the basis for determining land suitability. The research was conducted using analytical descriptive method and analyzed using the matching method between land quality and land characteristics as parameters with land suitability class criteria. The results showed that the actual land suitability class in Cangkringan sub-district for Yam cultivation was S3nr, na, eh, tc with limiting factors for nutrient retention, total N content, land slope, and temperature. While the potential land suitability is S3eh, tc with limiting factors for land slope and temperature. Improvements that can be made include the addition of organic matter, fertilization, making terraces and planting on land that is not shaded.
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