Chapter 4.4 (Loodusõp 6. kl e-tund)

Põllud ja mullaviljakus

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Chapter topics:

  1. Põllud ja mullaviljakus
  2. 1. Sissejuhatus
  3. 2. Muldade viljakus
  4. 3. Muldade kaitse ja mahepõllundus
  5. 4. Kokkuvõte
  6. Lisamaterjal
  7. Kodutöö ja tunni kirjeldus

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