E7 Soil

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Across
  1. 3. SOM refers to the mixture of non-living organic components present in the soil
  2. 5. Are used in the synthesis of chlorophyll.
  3. 7. This depletion or loss results in decreased soil quality and can lead to a serious decline in the yield of crops, thus affecting food supply
  4. 9. Is used in plant cell wall synthesis. Potassium controls the amount of water that enters via osmosis
  5. 10. Provides better harvests by killing insect pests.
  6. 12. Is used in the synthesis of amino acids and thus proteins, and iron, nitrogen
  7. 13. Is the accumulation of water soluble ions or salts in the soil due to continual irrigation to grow crops.
  8. 15. Over this 80% of the Earth’s something is made of the elements oxygen, silicon and aluminium with smaller amounts of calcium, iron, potassium, magnesium and sodium.
Down
  1. 1. something hydrocarbons (PAHs)
  2. 2. PCBs
  3. 4. The slow process by which organic matter containing nitrogen and phosphorus is broken down or mineralized to release nitrogen and phosphorus to roots.
  4. 6. and agriculture are the main sources where Common Organic Soil are used.
  5. 8. soil that stinks of organic fertilizer
  6. 11. Collect together in stable forms due to the presence of organic matter.
  7. 14. Matter that affects soil thermal properties by influencing soil temperature.