The repeated observation of a system in order to detect signs of change.

The amount of value an item or a service has in relation to its acceptable cash price for a willing seller and buyer.

The contribution of local evaporation and evapotranspiration to local precipitation (Trenberth & Trenberth, 1999).

Altered or changed.

Any system of agriculture that uses modern technology from conventional (q.v.) to organic (q.v.).

A human intervention to reduce emissions or enhance the sinks of greenhouse gases.

Lessening the force or intensity of something that can result in disbenefits.

Mining is the extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits. These deposits form a mineralized package that is of economic interest to the miner.

Minimum tillage systems are tillage systems in which the ground is worked very little before the seed is sown, and where crops can be sown almost immediately after the previous crop has been harvested (Rawson & Gómez Macpherson, 2000).

Mineralization in soil science is the decomposition or oxidation of the chemical compounds in organic matter releasing the nutrients contained in those compounds into soluble inorganic forms that may be plant-accessible.