Tài nguyên được gắn thẻ với: Tn
2 đề mục được tìm thấy (Hiển thị 1 - 2)
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01-01-2001 This simple device provides a method of manually producing bales of hay. Small-scale farmers may be interested in this technology because hay is both easier to store and easier to transport when it has been baled. Also, baled hay retains a higher nutrient content than hay that has been cut and...
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Tài Nguyên Chính 01-09-1984 Next to food, firewood is the most scarce item in developing countries. More than one third of the world is dependent upon firewood to supply their energy needs and ninety percent of the people in the poorest countries depend upon it as their chief source of fuel. What better way is there to...