All terms


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Aggregate stability

The ability of soil aggregates to resist degradation. An aggregate is many soil particles held together in a small mass. In a


Soil aggregates are soil peds of a range of sizes (microaggregates 53-250


Process whereby primary soil particles (sand, silt, clay) are bound together, usually by natural forces and substances derived from root exudates and microbial activity. Soil aggregates are arranged to form soil peds, units of soil structure, classified by shape (platy, prismatic, columnar, angular, subangular, blocky, granular

Agri-environmental zone (AEZ)

A spatially homogeneous area with distinctive characteristics in terms of the present climate, soil type and slope (

Agricultural Area

See Utilized Agricultural Area

Agricultural inputs

Anything that is not naturally available and is needed to grow a crop, such as machines, fertiliser, (irrigation) water, straw, crop residues, etc.


The science of ecology, or the branch of biology dealing with the relations and interactions between organisms and their environment, applied to the design, development, and management of agriculture.

Agronomic effect

The effects of soil-improving cropping systems (SICS) on crop yield.

Agronomic management/techniques

Techniques used to manage soil, water, nutrients and pests.


Non-vascular photosynthetic plant-like organisms, some of which live in or on the soil. They are informally divided into groups by their dominant pigments (i.e., green, blue-green, etc.)

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