• What are the most suitable soils for forest nurseries?
  a) Brown, flat and rusty soils 
  b) Sandy and stony soils
  c) Heavy soils, clays and loams

• Why are sandy soils not suitable for forest nurseries?
  a) They have low water holding capacity and are poor in nutrients 
  b) They are too wet and rich in nutrients
  c) They are too fertile and permeable

• What optimum soil mechanical composition is recommended for pine and spruce seedlings?
  a) Weak loam and light loam sands 
  b) Heavy loam and clay
  c) Very stony soils

• What type of soil can lead to water stagnation and root hypoxia?
  a) podzolic soils
  b) heavy soils, clays and loams 
  c) loose sands

• How much of the soil’s fluffy parts are suitable for most deciduous species?
  a) 5-10%
  b) 10-15%
  c) 15-20% 

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