Vegetable Industry #2B: Soil Tests, Profiles, and Texture

Front

Analysis of a soil sample to determine pH, composition, and the nutrients present and those that need to be added.

Back

soil test

Front

The measure of the acidity or alkalinity of soil. Most plants grow between the pH range of 5.5 to 7 (slightly acidic). If the soil is less than pH 7, then the soil is acidic. If the soil pH is over 7 (up to 14), then the soil is base or alkaline.

Back

soil pH

Front

Most vegetables like a slightly what pH?

Back

acidic (pH 5.5-7)

Front

The dark, stable, organic component of soil, formed by soil microorganisms that break down plant and animal matter. It contributes substantially to the nutrient content of the soil. This is the final product of composting: a process of breaking down organic materials like food scraps and yard waste.

Back

humus

Front

Shows each soil "horizon" from the soil surface all the way down to the parent bedrock.

Back

soil profile

Front

Which soil horizon is on the surface and holds the compost and humus?

Back

O horizon (organic layer)

Front

Which soil horizon is dark colored, holds lots of organic material, and includes the topsoil?

Back

A horizon

Front

Which soil horizon holds most of the dissolved minerals and includes the subsoil? Options: O Horizon, C horizon, A horizon, B horizon

Back

B horizon

Front

Which soil horizon includes the native weathered bedrock but supplies very little nutrient for the roots?

Back

C horizon

Front

Which soil horizon includes the native bedrock (unweathered parent material) but supplies very little nutrient for the roots?

Back

R Horizon (Rock)