A "human made" commercially prepared inorganic compound of plant nutrients.

Abiotic

The process of adjustment to actual or expected climate and its effects. In human systems, adaptation seeks to moderate harm or exploit beneficial opportunities. In natural systems, human intervention [..]

The ability of systems, institutions, humans, and other organisms to adjust to potential damage, to take advantage of opportunities, or to respond to consequences.

Requiring oxygen.

This form of nitrogen can be used by plants, or converted to nitrate by bacteria (and then taken up by plants). It is a positively charged ion (cation), attracted to negatively charged soil clay. For [..]

See mineralization.

The conversion of ammonium nitrogen to ammonia gas by soil microorganisms.  This usually occurs in soils with a high pH, that is a pH greater than 7.5, which are not common in California

The absence of oxygen.

Effects which relate specifically to human activities.