s:967:"TI Seed source establishment and management 
AU Mulawarman 
AU Sasongko S M 
AU Iriantono D 
AU Roshetko, J.M. 
AB Most farmers generally own, or have access to, only small areas of land and do not have the time or financial resources required to invest in intensive seed source management. In most cases, it is not feasible for the farmers to establish seed orchards or seed production areas. The best option for most farmers is to integrate seed trees into their existing farming systems, which often include pre-existing trees of many species. As mentioned previously, the main problem related to on-farm seed production is the limited number of trees available on individual farms. Collecting seed from a limited number of trees, results in a narrow genetic base and the negative effects discussed previously. To maximize the genetic base and productivity of on-farm tree sources, the following approach for establishing on-farm seed trees is recommended. 
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