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| Softening point drift
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A change in the softening point of bitumen. |
| Softwood
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General term used to describe lumber produced from needle and/or cone bearing trees (Conifers). |
| Softwood cutting
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A cutting made early in the season, from new growth. |
| Soil
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Upper layer of ground. |
| Soil amendment
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Ingredients such as sand, peat moss, or compost that are added to soil to improve its texture. |
| Soil bank
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Government compensation to farmers not to grow products to preserve the land and maintain stable agricultural products. |
| Soil capability
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Appropriateness of the soil for the designated purpose. |
| Soil cutter
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A device used to cut No Hub pipe, consisting of a handle and a cutting chain, similar to a chain wrench in appearance. |
| Soil density
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Compaction of soil as measured by a soils engineer by means of a Proctor test, determining the best amount of moisture for compaction. |
| Soil less mix
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Growing medium often containing materials such as perlite, vermiculite, and peat moss, but no natural soil. Holds water and nutrients very well. |
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