Soil

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Across
  1. 4. Decreases soil fertility, which can negatively affect crop yields.
  2. 5. Refers to the act of ensuring a level base or getting a specific slope on the land.
  3. 7. The act or process of building structure.
  4. 8. Toxins that can develop diseases.
  5. 9. The process of converting waste materials into new materials and objects.
Down
  1. 1. The act or process of working the ground, planting seeds, and growing edible plants.
  2. 2. The process of extracting  useful minerals or materials from the surface of the earth.
  3. 3. The practice of cultivating the soil, growing crops, and raising livestock.
  4. 4. The material on the surface of the earth that provide nutrients for plant growth.
  5. 6. The introduction of harmful or poisonous substances .