A method of improving the fertility of poor soils by adding a layer of small stones atop the soil, with perhaps some fertilizer atop the soil before adding rocks. The added rocks/stones would leech...

Abbreviation of autonomous oblast. / Abbreviation of autonomous okrug. / (US, Navy) Abbreviation of auxiliary oiler. / (chemistry) Initialism of atomic orbital. / Abbreviation of area of operations.

predatory

(transitive) To assign to the initial periods; to schedule for as early as possible.