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2. Soil conditioner - Wikipedia

   en.wikipedia.org/wiki/Soil_conditioner

   Soil conditioner. A soil conditioner is a product which is added to soil to improve the soil’s physical qualities, usually its fertility (ability to provide nutrition for plants) and sometimes its mechanics. In general usage, the term "soil conditioner" is often thought of as a subset of the category soil amendments (or soil improvement, soil ...

3. Glacial till plains (Ohio) - Wikipedia

   en.wikipedia.org/wiki/Glacial_till_plains_(Ohio)

   The Glacial till plains are a till plain landform in Northern Ohio, located near the shore of Lake Erie and produced by the retreat of the Wisconsin glaciation. Since glacial till is highly fertile soil, agriculture on the glacial till plains is very productive. The region has gently rolling moraine hills left over from the retreating glaciers ...

4. Unified Soil Classification System - Wikipedia

   en.wikipedia.org/wiki/Unified_Soil...

   The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt): If the ...

5. Leonardite - Wikipedia

   en.wikipedia.org/wiki/Leonardite

   Leonardite is a soft waxy, black or brown, shiny, vitreous mineraloid that is easily soluble in alkaline solutions. It is an oxidation product of lignite, associated with near-surface mining. [1] It is a rich source of humic acid (up to 90%) [2] and is used as a soil conditioner, as a stabilizer for ion-exchange resins in water treatment, [3 ...

6. Till plain - Wikipedia

   en.wikipedia.org/wiki/Till_plain

   Till plains are large flat or gently sloping areas of land on which glacial till has been deposited from a melted glacier. In some areas, these depositions can be up to hundreds of feet thick. The morphology of the till plain is generally reflective of the topography of the bedrock below the glacier. Another term for till plain is ground moraine.

7. Tree line - Wikipedia

   en.wikipedia.org/wiki/Tree_line

   The foreground shows the transition from trees to no trees. These trees are stunted in growth and one-sided because of cold and constant wind. The tree line is the edge of a habitat at which trees are capable of growing and beyond which they are not. It is found at high elevations and high latitudes. Beyond the tree line, trees cannot tolerate ...