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2. 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.

3. Structural Soil - Wikipedia

   en.wikipedia.org/wiki/Structural_Soil

   Structural Soil is a medium that can be compacted to pavement design and installation requirements while permitting root growth. It is a mixture of gap-graded gravels (mostly made of crushed stone) and soil (mineral content and organic content). It provides an integrated, root penetrable, high strength pavement system that shifts design away ...

4. Solid waste policy of the United States - Wikipedia

   en.wikipedia.org/wiki/Solid_waste_policy_of_the...

   Applying this manure to agricultural land can improve the fertility of the soil providing it essential nutrients. It is estimated that 27.8% of the municipal solid waste generated in United States in 2009 was organic waste consisting of yard trimmings and food waste that is compostable. [6]

5. How to Edge Your Lawn the Right Way, According to ... - AOL

   www.aol.com/edge-lawn-way-according-landscape...

   Step Two: Clean and Prep the Space. For the best results, you’ll want to begin with a clean surface, which is why Carpenter says it’s important to mow and tidy up a bit before you get started ...

6. Hydroponics - Wikipedia

   en.wikipedia.org/wiki/Hydroponics

   Gericke created a sensation by growing tomato vines twenty-five feet (7.6 metres) high in his back yard in mineral nutrient solutions rather than soil. [24] He then introduced the term Hydroponics , water culture, in 1937, proposed to him by W. A. Setchell , a phycologist with an extensive education in the classics.

7. Soil fertility - Wikipedia

   en.wikipedia.org/wiki/Soil_fertility

   Soil fertility refers to the ability of soil to sustain agricultural plant growth, i.e. to provide plant habitat and result in sustained and consistent yields of high quality. [3] It also refers to the soil's ability to supply plant/crop nutrients in the right quantities and qualities over a sustained period of time.