There are 18 entries in this glossary.
| Term | Definition |
|---|---|
| Humus | The brown or black organic part of the soil resulting from the partial decay of leaves and other matter.
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| Hybrid | The offspring of two plants of different species or varieties of plants. Hybrids are created when the pollen from one kind of plant is used to pollinate and entirely different variety, resulting in a new plant altogether.
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| Hydroponics | The science of growing plants in mineral solutions or liquid, instead of in soil.
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