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Analyzing Soil Samples: Characteristics and Components

This document provides a detailed analysis of three soil samples, focusing on their tactile properties, odors, and visual characteristics. Each sample is assessed based on its feel (e.g., silky, rough), smell (e.g., earthy, moldy), and appearance (e.g., color, texture). Additionally, the fundamental components of soil—sand, clay, and humus—are explored. Sand consists of larger grains and appears light in color, while clay is fine-textured and easily sticks together. Humus, derived from decaying organic matter, is crucial for plant growth.

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Analyzing Soil Samples: Characteristics and Components

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  1. Soil Sample Sites 1 2 3

  2. Soil Sample 1: Feels _____________________________________________________ Smells ____________________________________________________ Looks ____________________________________________________ I think soil sample 1 is ________________________________________ Soil Sample 2: Feels _____________________________________________________ Smells ____________________________________________________ Looks ____________________________________________________ I think soil sample 2 is ________________________________________ Soil Sample 3: Feels _____________________________________________________ Smells ____________________________________________________ Looks ____________________________________________________ I think soil sample 3 is ________________________________________

  3. FEELS silky rough smooth sharp soft bumpy sticky mushy slippery gritty SMELLS sweet moldy musty rotten fresh earthy sour Soil Describing Words LOOKS • color? • Brown • Tan • White • Black • Gray • lumpy • soft • bumpy • clean • dirty

  4. Three Important Components of Soil!Sand, Clay, and Humus

  5. SAND • Sand is made from weathered rocks, mostly quartz • Sand is made up of large grains • Sand is very coarse • Sand is usually light in color

  6. CLAY • Clay comes from weathered rock too! • Usually from a rock called feldspar • Clay has very, very tiny grains • Clay is very soft • Clay sticks together easily • Clay can be different colors

  7. HUMUS • Humus is the name for the organic material in soil (like decaying leaves and twigs) • It may have large and small pieces of dead plants and animals • Fungi and earthworms help break down dead matter into humus • It is very good for growing plants

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