Soil

Soil Science Simplified

By Helmut Kohnke and D.P. Franzmeier. 24 illustrations. Fourth Edition. 162 pages, 5-3/4" x 8-3/4". Softcover. Recommended for people who don’t have the time to devote to an extensive study, or to gain an understanding of t... More.

Worm Vue Wonders™

Peek into the underground world of earthworms and discover their earth-saving secrets! See how they turn waste into soil and dig tunnels to create drainage for plants. Perform experiments to demonstrate how worms live and work underground. Have fun ... More.

Chemical Composition of the Soil

This kit allows people to perform chemical determinations on locally derived soils for the following components: percentage of water; soil organic content; pH (hydrogen ion concentration); reagent tests for calcium, carbonates, magnesium, and phosphates... More.

Biology and Chemistry of Soil Experiment Kit

Using ordinary soil samples and simple, easy-to-follow techniques and staining procedures, identify the type and variety of microorganisms; calculate soil fertility by a cation exchange capacity elimination; test and determine its pH; and correl... More.

What’s in the Soil? Part 1

Using ordinary soil, perform comprehensive soil nutrient and mineral analysis, testing for the presence of 10 nutrients and minerals necessary for adequate plant development. Also determine water content, organic matter content, and pH of several differ... More.

Topsoil Tour

Get your hands dirty! The Topsoil Tour is an exciting investigation into the physical and chemical properties of soil. Each person on the Topsoil Tour completes seven units while conducting his or her own soil tests for soil texture, pH, nitrogen, phosp... More.

Soil Composition and Structure Kit

A great follow-up kit for the Introduction to Soil Kit listed at left (C29425N). In the first activity, describe a soil sample and develop a primary definition of soil. The second activity expands the investigation of soils by using a water column t... More.

Introduction to Soil Kit

In this kit, observe several different earth materials with a magnifying lens. The observations, including metric measurements, are used to help understand how these materials are classified and identified. Apply the skills and understanding developed i... More.

Soil Classes

The separates alone are only the beginning of soil textural study, since they are not found pure in nature, but are always mixed. It is the natural mixture found in the field and known as soil classes – the sands, the loams, and the clays – ... More.

What’s in the Soil? Part 2

This kit contains materials to selectively culture the different types of microbes found in soil. Learners collect and extract different soil samples and then record the number of types of organisms found. Kit includes sufficient materials for 30 people... More.