21. It refers to material used once and can be used again. A. liquid waste B. recyclable waste C. reusable D. solid waste 22. It is used for hauling trash, fertilizers, planting materials and other equipment. A. spade B. spading fork C. shovel D. wheelbarrow 23. The following are example of tools used for collecting farm wastes EXCEPT, A. Thresher B. spading fork C. shovel D. wheelbarrow 24. It is used in removing trash, digging loose soil, moving soil from one place to another and for mixing soil. A. spade B. spading fork C. shovel D. wheelbarrow 25. It is used for loosening the soil, digging out root crops and turning over the materials in a compost heap. A. spade B. spading fork C. shovel D. wheelbarrow​