Term
| What is the total land area on Earth? (ha) |
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Definition
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Term
| What is the total amount of arable land on Earth? (ha) |
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Definition
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Term
| How are 'nutrients' produced in soils? |
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Definition
| 1. the dissolution of soil minerals; 2. microbial processes that convert organic forms of nutrients to inorganic forms |
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Term
| Where on land might you not find soils? |
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Definition
| Under the arctic and antarctic ice caps |
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Term
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Definition
| A minimum volume of soil: 1m2 of surface area by 1.5 m depth |
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Term
| What are the five soil forming factors? |
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Definition
| parent material, biota (vegetation), topography, climate, and time |
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Term
| What two processes comprise weathering? |
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Definition
| 1) the separation of the rock's individual mineral particles, and 2) their alteration, destruction, or resynthesis to form new minerals |
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Term
| What properties of humus make it analogous to clay? |
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Definition
| 1. water retention, 2. nutrient retention, and 3. cohesion |
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Term
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Definition
| materials in the form of fine particles; 1 nanometer (1 nm) to 1 micron (1 μm) |
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Term
| Soil texture refers to particle size whereas soil structure refers to? |
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Definition
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Term
| The most important binding agents in forming aggregates are? |
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Definition
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