The distribution of Ultisols and their chemical and physical limitations to agriculture in Indonesia

• Main Author: ELLA FRISELLA
• Other Authors: Shih-Chieh Chang
• Format: Others
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/w563b6

碩士 === 國立東華大學 === 自然資源與環境學系 === 102 === Soil is a natural resource that is imposes many limitations on agricultural productivity. Because of increasing human population, the amount of agricultural soil available for each person will decrease. Increased population has led to a higher demand for food. Therefore, farmers have been forced to use marginal soil, such as Ultisols, for agriculture. Ultisols have a large distribution in Indonesia. They are characterized by physical problem such as degraded soil structure and chemical problems such as low soil nutrient, low soil pH, and high aluminum (Al) and iron (Fe). The research objective of this study was to understand physical and chemical problems of Ultisols and to explore ways to solve these problems to improve food production on Ultisols. Conservations by organic or inorganic fertilizers are very importance to solve physical and chemical problems in Ultisols. Organic or inorganic fertilizers might be more efficient for both farmers and plants. There disadvantages are with using them incorrectly. Therefore, collaboration is necessary Indonesian governmental employees, extension workers, scientists, and farmers to ensure proper use of organic or inorganic fertilizers. If farmers apply correct organic or inorganic fertilizers, not only will they supply nutrients required for plant growth and increase crop production but farmers will also increase their level of income.