PDF versionNotes on the 2001 Edition
- Investigation 1: Beginning to Investigate Soil
- Investigation 2: Separating Soil by Settling
- Investigation 3: Separating Soil by Sieving
- Investigation 4: Examining Core Samples of Soil
- Investigation 5: Water and Other Chemicals in Soil
- Investigation 6: Soil Erosion
- Investigation 7: Using Soil Data to Plan a Garden
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Teacher's Edition, Page 88, Fourth Sentence of Second Paragraph
"In natural soils, the abundance of plant material is greatest very near the soil surface, and decreases sharply downward. Underlined "decreases" replaces "increases"
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