Agrometeorology by Professor Dr. J. Seemann, Professor Dr. Y. I. Chirkov,

By Professor Dr. J. Seemann, Professor Dr. Y. I. Chirkov, Professor Dr. J. Lomas, Dr. B. Primault (auth.)

Agrometeorology is a relatively younger technology. The beginnings of agrometeorological paintings got here within the 20's of this century, while agrometeorology used to be a operating department of climatology. within the years following 1950 it then built broadly to an self sustaining technological know-how. during this strategy, agrome­ teorology has not just won an unlimited wisdom of the impact of meteorological stipulations on vegetation and farm animals in agriculture and harm prevention, but in addition developed new advisory tools that are of significant useful use in agriculture. as much as the current time there was essentially no particular education for an agrometeorologist. Agrometeoro­ logists are drawn, in line with their education, from the ranks of normal meteorology or from agriculture and its similar organic disciplines. they have to, for that reason, them­ selves assemble the information for his or her agrometeorological paintings and mix for themselves the complicated of agrome­ teorology from organic and meteorological info. this can be usuaIIy faraway from effortless, because the appropriate literature is scattered one of the most generally differing journals, partially in little-known international languages, and is therefore very tough of entry. entire writings are to be discovered purely in only a few partial fields of agrometeorology. the topic of teaching difficulties has hence been handled as of maximum significance on the conferences ofthe fee for Agrometeorology (CAgM) of the area Meteorological association (WMO), particularly as agrometeorology has gained such nice importance and important­ ness not just within the so-called underdeveloped nations in advancing a extra efficient agriculture, but in addition in coun­ attempts whose agricultural general is already high.

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Meteorol. Z. : New investigations on the nighttime effective radiation. Gerlands Beitr. Geophys. : The stability of selenium photocells. Z. Meteorol. SEEMANN The processes involved in heat conversion on the soil are most easily made understandable by means of a model. If one assumes a vegetation-free partial section of the earth's surface that can be generally considered to be flat, then the positive net radiation that is converted into heat on the surface is led away in varying manner. A portion of the heat is led off into the ground and leads to warming the ground.

Three different topological 33 Heat Balance eal'em- 2 'h- 1 eal'em- 2 'h- 1 40 40 35 35 25 20 15 15 10 --0 0 -5 -10 -10 -15 -15 -20 -25 -30 t. _ _ _- -5 -10 -15 -25 -30 o h 4 8 12 16 20 24 Fig. 1. - fine-grain loamy deposits, high moor and low moor). Z. 6 I 8 I Fig. 2. Daily course of heat householf of a leaf of Alocasia indica. (After research by Raschke) areas are to be treated: sandy soils of fine grain and loamy deposits, high moor, and low moor. The investigations were carried out by Miess (1968) during a 4-day fine-weather period in September 1964 in Northern Germany.

M··~O;~~: content Troposphe·;e - 100 mb /··HYdrometeors Fig. 1. Composition of the atmosphere acceleration of gravity. The results obtained with this formula, therefore, are merely an initial approximation, but one which is excellent because it differs from the standard atmosphere by only 1 mbar at an altitude of 12,000 m. In addition, the average temperature of the layer of air decreases as it moves away from the equator (see Sect. 1), with a resulting increase in its density. This means that the pressure exerted by a column of air of the same height will be higher at the pole than at the equator.

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