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丘陵地土壤侵蚀被普遍认为是菲律宾国内最严重的环境问题 ,影响到了土地总面积的 6 3%～ 76 % (Ｐａｎｉｎｇｂａｔａｎ ,1 990 )。近 2 0年来 ,政府和非政府组织已经实施了丘陵地发展项目 ,其中的一个主要组成部分就是改进丘陵地农民使用的土壤保持措施 (如丘陵地农业技术或Ｓ
Soil erosion in the hilly terrain is generally considered to be the most serious environmental problem in the Philippines and affects 63% to 76% of the total land area (Paningbatan, 1990). In the last 20 years, government and NGOs have implemented hilly land development projects. One of the major components is the improvement of soil conservation practices used by farmers in hilly land (such as hilly farming techniques or S