Açıklama
Agriculture and Forestry, Part III. Animal pests, symbiosis and soil life, 24 prepared microscope slides – – Root nodules of Alnus, with symbiotic bacteria – Spruce beetle (Cryphalus picea), larva t.s. – Wood with normal annual rings, t.s. – Wood with anomalous narrow annual rings caused by drought, t.s. – Bark with larval galleries of spruce beetle, t.s. – Pineapple-like gall on spruce caused by lice, t.s. – Gall nut on oak caused insects, t.s. – Acidophile soil bacteria, solution of heavy metals – Nitrite bacteria, formatting harmful nitrogenous substances – Root of beech with ectotrophic mycorrhiza, t.s. – Root of birch with partly endotrophic mycorrhiza, t.s. – Root of lupin with symbiotic nitrogen fixing bacteria – Netted venation, portion of rotted deciduous leaf – Charlock (Sinapis), t.s. of stem. Green manure plant – Soil bacteria (Bacillus megatherium), smear – Hyphae of root fungi, t.s. – Pollen grains of different kinds of grass – Mushroom (Xerocomus), mycelium – Root of willow (Salix), planting protecting against erosion – Earthworm (Lumbricus) t.s., causing soil improvement – Springtails (Collembola), w.m. – Mite from forest soil, w.m. – Constituents of humus soil – Constituents of peaty soil
