Solve the crossword puzzle given below:

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Across
  1. 4. Culture of blue-green algae is used in the preparation of.
  2. 6. Process of crossing two genetically different plants.
  3. 7. An important Fodder crop.
  4. 10. It given to cattle which is rich in cellulose.
  5. 11. Milk-producing female cattle.
  6. 13. Cattles used for farm labour.
  7. 14. Commercially produced plant nutrient.
  8. 15. Organisms cultivated for pearls.
  9. 16. Xanthium and Parthenium are commonly known as.
Down
  1. 1. Nutrients required in small quantities.
  2. 2. Refers to the availability of flowers and plants near bee hives
  3. 3. Farming without the use of chemicals as fertilizers and herbicides is known as.
  4. 5. Duration of sunlight which an organism receives.
  5. 8. Another term for bee-keeping.
  6. 9. Which type of crop is Pigeon pea.
  7. 12. Rearing of marine fish in seawater.