Answer:
C. A density gradient tube and a soil triangle
Step-by-step explanation:
- The soil analysis is used to breaks the soil indifferent type on the basis of the texture class such as the silt, clay and sand etc. Influenced by the nutrient, and the water retention capacity.
- Soil triangle is used to define the type of the soil texture and also helps to establish the quality and nature of the soils found in various environmental conditions.