science ch 1 puzzle

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Across
  1. 1. a fertilizer
  2. 5. process of supplying water to crops at different intervals is called.
  3. 8. chemicals that are used to remove weeds.
  4. 10. a tool which is used for removing weeds and for loosening soil.
  5. 11. chemical substances rich in nutrients such as nitrogen, phosphorus, potassium.
  6. 14. soil matter formed by decayed organic matter is called
  7. 15. Activities the activities used for cultivation of crops
  8. 16. Seed drill is used for
Down
  1. 2. BHC (Benzene hexachloride) is a
  2. 3. plant products to replace weedicides.
  3. 4. instrument is used for spraying weedicides
  4. 6. a source of irrigation
  5. 7. Transplantation of seedling is done in
  6. 8. name of the undesirable plants that grow among the crops
  7. 9. process of loosening and turning of the soil called.
  8. 12. organic substances which are added to the soil in the form of nutrients called.
  9. 13. crop belonging to rabi crop.