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Soil Types andHydroponics Materials
Organic Matter
Compost Composting is the decomposition of plant remains and other once-living materials to make an earthy, dark, crumbly substance
Bark Particles are too large to use in seed germination media
Mulch Used to cover soil to help hold moisture, prevent weeds, etc.
Straw Used to help prevent erosion.
Organic Matter
Peat Moss Absorbs water and air like a sponge.
Sphagnum Like peat moss but found on the top of a bog.
Saw Dust High carbon to nitrogen ratio makes nitrogen unavailable for plant use.
Wood shavings
High carbon to nitrogen ratio makes nitrogen unavailable for plant use.
Inorganic Compounds
Soil less Media
Artificial soil
Vermiculite Mica mineral matter used to start seeds and cuttings, helps hold moisture, has neutral pH.
Perlite Natural volcanic material that helps aeration and water-holding capacity
Hydroponics
Aggregate culture
Using sand or gravel to support plant roots
Water culture
Plant roots grow in water containing dissolved nutrients
Aeroponics Plant roots hang in air and are misted regularly with a nutrient solution
Continuous-flow system
Nutrient solution flows constantly over plant roots, most commonly used for commercial production
Resources
http://aggie-horticulture.tamu.edu/earthknd/compost/slide12a.1.gif http://vegweb.com/composting/ http://www.sites.onlinemac.com/bioreclaim/images/3-4%20inch%20bark
.jpg http://www.creeksidesoils.com/gold_mulch.htm http://www.csc.ncsu.edu/faculty/xie/straw/baled-straw.jpg http://www.mosserlee.com/img/whatis2.jpg http://www.snakeroot.net/farm/pix/MulchAtEdgeGH3.jpg http://www.foxridgehorse.com/shavingscan.jpg http://www.naturalsolutionsetc.com/jpeg/pond_soilless.jpg http://www.myjanee.com/gallery/textures/vermiculite.jpg http://www.mycotopia.net/teks/perlite.jpg http://www.co.vermilion.il.us/Wilderness/gravel.jpg http://www.hydroponics-resource.com/aerospring_roots.jpg http://www.insidesun.com/images/products/ASQ215-th.jpg