17 slides

1 - Acidophile soil bacteria, solution of heavy metals
2 - Nitrite bacteria, forming harmful nitrogenous substances
3 - Root of beech with ectotrophic mycorrhiza, t.s.
4 - Root of birch with partly endotrophic mycorrhiza, t.s.
5 - Root of lupin with symbiotic nitrogen fixing bacteria
6 - Netted venation, portion of rotted deciduous leaf
7 - Charlock (Sinapis), t.s. of stem. Green manure plant
8 - Soil bacteria (Bacillus megaterium), smear
9 - Hyphae of root fungi, t.s.
10 - Lichen, indicator of clean air
11 - Mushroom (Xerocomus), mycelium
12 - Root of willow (Salix), planting protecting against erosion
13 - Earthworm (Lumbricus) t.s., causing soil improvement
14 - Springtails (Collembola), w.m.
15 - Mite from forest soil, w.m.
16 - Constituents of humous soil
17 - Constituents of peaty soil