Designation (also crediting) for the classification of the quality (creditworthiness) of agricultural viewing objects. This can be certain plant characteristics, the fruit condition or the nature of floors affect. In the latter case, the soil composition and signs of aging, taking into account the impacting groundwater and climatic conditions classified. Criteria for the creditworthiness are, for example, cultivation restrictions (main fruits), processing ability, thickness, background, cohesion of the crumb, absorption (absorption capacity) and moisture (see also under water discharge and Water storage capacity ), as well as melioration effort (measures to increase the value of the soil). The soils are estimated on a scale of 1 to 100, under 18 a soil is no longer agriculturally usable.
In plant grading, the plant characteristics become the main points habitus (Growth), shoots / sprouts, leaf characteristics, flower, scent and fruit characteristics, each with sub-points with partially given information described (eg in leaf / top are the hairy, glandular, bald, dull, shiny, woolly, frosted). Another criterion is the number of insects living on a plant. From this, protective and care measures such as the use of sprays or fertilizer be determined. Furthermore, this is a selection criterion for one vegetative propagation provided plants. Large-scale soil assessments in the viticulture are possibly also via satellites based on the NDVI (Normalized Differenced Vegetation Index), which is often used when precision viticulture is common. See also below EUF method and Nmin method,