13. A tool used for digging big holes and for digging out big stones and stumps. a. Shovel b. Rake c. Spade 24. A farm equipment used to pull a plow and harrow in preparing a large area of land. a. Hand tractor b. Four wheel tractor C. Water pump d. Farm implement 15. A farm equipment used to pull a plow and harrow in preparing much bigger area of land. a. Hand tractor b. Four wheel tractor . Water pump d. Farm implement 16.. It is the content of a body or object. b. Area 17. Any material added to the soil to support nutrient. d. Moluscide a. Insecticide c. Herbicide 18. Refer to the size of a surface a. Length b. Area c. Volume