Term
| Topsoil is darker because: |
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Definition
| more water, nutrients, decayed material, bacteria |
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Term
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Definition
clay, sand, silt
clay: holds it together
sand: aeration
silt: nutrient particles, provides surface area for adhesion |
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Term
| how many essential nutrients? |
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Definition
17
9 macro 8 micro
carbon, oxygen, hydrogen, ammonium, potassium |
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Term
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Definition
| soil particles a little - charged (hold cation nutrients better |
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Term
| to loosen electrostatic bonds: |
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Definition
plant releases CO2 into soil, combines with water to form H2CO3 (carbonic acid)
release +H
plant can absorb +H |
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Term
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Definition
bacteria that live in nodules provide more nitrogen ions
can imbed into roots |
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Term
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Definition
water evaporates, leaves salt behind
decreases WP of soil, hard for plants to grow |
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