8. It refers to a set of tools or other objects used to achieve a particular goal and objective a. equipment b. labor c. money d. time 9. This system is also known as filler system. In this way, planting another plant in the center of each square makes use of empty space, a. Contour System b. Quincunx System c. Rectangular System d. Square System 10. is enriching materials used on land to increase its productivity. It contains nutrients that plants and trees need to grow. a. fertilizer b. sunlight c. temperature d. water ​