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2. List of inventoried hardwoods in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_inventoried...

   Native ash species, including white ash (pictured), have been declining rapidly this century due to predation by the emerald ash borer. [1]Silvics of North America (1991), [2] [3] a forest inventory compiled and published by the United States Forest Service, includes many hardwood trees.

3. Soil regeneration - Wikipedia

   en.wikipedia.org/wiki/Soil_regeneration

   Soil regeneration, as a particular form of ecological regeneration within the field of restoration ecology, is creating new soil and rejuvenating soil health by: minimizing the loss of topsoil, retaining more carbon than is depleted, boosting biodiversity, and maintaining proper water and nutrient cycling. [1]

4. Soil formation - Wikipedia

   en.wikipedia.org/wiki/Soil_formation

   Soil formation. Soil formation, also known as pedogenesis, is the process of soil genesis as regulated by the effects of place, environment, and history. Biogeochemical processes act to both create and destroy order (anisotropy) within soils.

5. Ask the Expert: Is it the right time to prune shrubs? - AOL

   www.aol.com/ask-expert-time-prune-shrubs...

   A: Late winter or early spring is generally the best time to prune conifers (needled evergreens) such as arborvitae, but these plants do not respond well to heavy pruning at any time of the year ...

6. Compost - Wikipedia

   en.wikipedia.org/wiki/Compost

   Compost is a mixture of ingredients used as plant fertilizer and to improve soil 's physical, chemical, and biological properties. It is commonly prepared by decomposing plant and food waste, recycling organic materials, and manure. The resulting mixture is rich in plant nutrients and beneficial organisms, such as bacteria, protozoa, nematodes ...

7. Topsoil - Wikipedia

   en.wikipedia.org/wiki/Topsoil

   Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.