E.-W. Schenk
After the Second World War German agricultural economics basing on the organ theory of holdings created by Aereboe and Brinkmann has put the development of calculations on decisions into the foreground of their research work. Decisive stimulations came from the Anglo-Saxon room - particularly from the Heady-School -, it is true, but it may be stated that nearly all agricultural educational institutes have made important contributions, and here only the names of Weinschenk (21), Urff (20) and Zapf (23) are indicated representatively.

As to the horticultural economics only Storck (19), with his proposal to introduce the risk problem, contributed to the development of this making decisions in the respect of quantity. Without doubt the explanation is that, after the first high school institute for horticultural economics was established in 1950, this young science in its first phase like all disciplines had to put a descriptive registration of the real estate into the foreground of its activities - a period which minted a whole generation of agricultural economics.

In spite of small contributions to the theoretical "background" of the mathematical decision making also horticultural economics intensively endeavoured for an adaptation of the methods to the special conditions of the extremely variable productions of many forms. The listener who is less familiar with horticultural production be told that e.g. on the wholesale market for flowers in Cologne about 100 different ornamental plants with somewhat greater importance for the market are offered and that the market review of the Union of German Tree Nurseries comprises about 15,000 items.

The works by Dorling (2), Simpson and others (18) and Lloyd a. o. (8) in England as well as by Mayer (9), Schleiff (15) and Dicke (1) in the German Federal Republic, however, showed that methods mature for application were developed also for horticulture, and the "Arbeitskreis Betriebswirtschaftliche Beratung im Gartenbau am Institut für Gärtnerische Betriebslehre und Marktforschung" at the T.U. of Hanover established a LP-service already in 1968, in the frame of which the advisory service continuously makes plannings for single farms.

Under this aspect the question seems justified whether research and extension service at a fully advisory help is maintenable, above all for the reason because the farm comparison in the sense of the holding theory is not convincing in all points. Thus the successes which, without doubt, were reached in practice with the farm comparison are not devaluated, but ad hoc we must be aware that they are partly based on empiricism

Schenk, E.-W. (1972). THE USE OF EDP FOR FARM COMPARISONS. Acta Hortic. 25, 168-190
DOI: 10.17660/ActaHortic.1972.25.15

Acta Horticulturae