Soil
저자: Elijah Sutton
1. Is made of
1.1. Weathered Rocks
1.1.1. Sand
1.1.2. Silt
1.1.3. Clay
1.2. Organic Matter
1.2.1. Nutrients
1.2.1.1. Nitrogen
1.2.1.2. Potassium
1.2.1.3. Phosphorus
2. Descriptions
2.1. Texture
2.1.1. Silky
2.1.2. Sticky
2.2. Color
2.2.1. Chocolate/Yellow Brown
2.2.2. Grayish/Chocolate Brown
2.3. Consistance
2.3.1. Loose
2.3.2. Firm