GLEBA - experimental set with laboratory equipment and work cards

MACHINE TRANSLATION (not authorised yet)

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.

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 instruction contains work sheets with detailed descriptions of the following experiences: S soil mineral deposit - Basic soil fractions - Durability of the soil's tubular structure - Soil moisture - Soil filtration capacity - Soil water capacity - Soil pH - Soil physical sorption - Influence of calcium and sodium-containing fertilizers on the soil's tubular structure - Influence of liming of the soil on its pH - Construction of earthworms and their effect on soil fertilization - Soil organisms and their activity in the soil - Differentiation of soil fauna depending on the type of soil - 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.