Soil Plus - experimental set with laboratory equipment and work cards

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A carefully designed set of 20 experiments with a discussion for the teacher (from theory to conclusions) and a set of necessary laboratory equipment (cylinders, petri dishes, beakers, pipettes, tweezers, cork vials, funnels, sieve and mesh, sifts, magnifiers, double-sided spatula, soil spatula etc.).) and substances, including reagent with a colorimetric scale. The set, with the help of simple but interesting experiences, familiarizes with the most important features and role of soil in nature. Starting from soil types and granulometric composition, through physicochemical properties, we come to the role of living organisms in the soil, as well as the effects of human activity. The attached work sheets can be copied.

Expanded version of the GLEBA set - the experimental set with laboratory equipment and work cards has been enriched with additional reagents for determination of nitrogen, phosphorus and potassium content in soil.

The set also includes colourful foiled plates A4 showing selected stages of some experiments. The whole set is placed in a rigid case. The set was highly appreciated by teachers. We recommend!

The manual contains work sheets with detailed descriptions of the following experiences: Soil mineral deposits - Basic soil fractions - Durability of the soil's tubular structure - Soil moisture - Soil filtration capacity - Soil water capacity - Soil pH - Soil physical sorption - Effects of calcium and sodium fertilisers on the soil's tubular structure - Effects of liming on the soil pH - Construction of earthworms and their effect on soil fertilisation - Soil organisms and their activities in the soil - Differentiation soil fauna depending on soil type - Soil salinity and plant development - Soil salinity and water consumption by plants - Influence of soil contamination on germination and plant growth - Influence of sodium chloride on soil structure - Influence of soil acidification on the condition of trees - Participation of plants in soil-forming processes - Testing of nitrogen (NO3) content in soil - Testing of phosphorus (P2O5) content in soil - Testing of potassium (K2O) content in soil.