BOTANY

Detailed explanation-1: -The high carbon to nitrogen ratio of non-decomposed sawdust and wood shavings affects nitrogen in growing media by: A. Acting as a fertilizer.

Detailed explanation-2: -If there are large amounts of straw or sawdust, nitrogen availability to plants may be lowered by increasing the C/N ratio. High carbon relative to nitrogen (greater than 25 /1) will tie up nitrogen.

Detailed explanation-3: -Sphagnum peat moss, hypnum peat moss, and reed and sedge peat moss are three types of peat in horticultural classification. Sphagnum peat moss is the most desirable and popular type, as it has higher moisture-holding capacity and does not break down as rapidly as other types of peat.

Detailed explanation-4: -Sphagnum moss is perhaps the most desirable form of organic matter for the preparation of growing media. Drainage and aeration are improved in heavier soils while moisture and nutrient retention are increased in lighter soils.

Detailed explanation-5: -Growing media components are either organic or inorganic. Organic components include, but are not limited to: peat moss, bark, coconut coir, rice hulls, wood fiber, etc. Inorganic components include, but are not limited to: perlite, pumice, vermiculite, sand, hydrogel, etc.