Temperature at the stage of seed-ripening in fruit of eggplant (Solanum melongena L.cv. Aizumaru) affects seed germination. Seeds isolated from fruit ripened at 30°C show higher germination rates than do those ripened at 20 and 10°C. A long incubation period causes the higher germination rate. When seeds are isolated from fruits ripened for a short period, low germination rates result regardless of the incubation temperature.

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A study was made in the summer and autumn of 1976 on the effects of different soil moisture conditions on the contents of nitrogen compounds on the quality of Satsuma mandarin fruit.
The following results were obtained:
1) Fruit of high quality was obtained from trees grown under medium moisture (pF 2.0-2.5) in August and under low moisture (pF 3.0-3.5) in September. The contents of soluble solids in the juice of the fruit, the water content of the pulp and weight of the fruit were affected more by low moisture in September than they were in August.
2) The proportion of alcohol insoluble solids in the pulp decreased under reduced soil moisture. This suggests that hydrolysis of polysaccharides may occur and that this produces the high sugar content in the juice when there is low moisture.
3) Contents of the total and soluble nitrogen compounds in the peel and in the pulp, as measured on Oct. 4, showed greater increases under low moisture given during August and under medium moisture given during September than they did under other soil moisture conditions. Contents of the total, soluble and insoluble nitrogen compounds in the peel as measured on Dec. 4, were higher under the low moisture regime given in August than they were under the medium moisture regime for the same period.
4) The contents (mg per 100 ml juice) of proline, arginine, asparagine, aspartic acid, serine and γ-amino-butyric acid increased more under low moisture than under medium moisture during August and September. High proline and arginine contents (percent based on the dry weight of juice) and a low alanine content were observed under low moisture. Contents of asparagine and aspartic acid, measured on Oct. 4, were higher under the low moisture than under the medium moisture regime given in August. The metabolism of amino acids in mandarin fruit appeared to be altered by the condition of soil moisture during August and September.

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Dynamic behaviour of water content in plants was investigated in connection with humidity control.
Computer control of humidity by detecting water content in plants was carried out, using cucumber and sunflower. For constant control of water content in plants, humidity was controlled by PID algorithm. For transient control to newly desired value of water content in plants, humidity was controlled by DP (Dynamic Programming) method. Response curves in these different controls could be explainned by examination of modelling-simulation procedure. It was concluded that such a modelling-simulation procedure as presented in this paper was one of the most effective approaches to explain the dynamic behaviour of water content in plants in both total feedback system and each element of the sub-system in connection with humidity control.

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The purpose of the present study was to investigate the adult emergence rhythm in Bombyx mori. The results obtained were as follows:
1) There were two kinds of mass emergence rhythms in Bombyx mori which were produced by light conditions during the pupal stage in substance; (9-10) +24n hours from the light off and 1 + 18n hours from the light on.
2) Mass emergence rhythms under the photoperiodic conditions were unimodal or bimodal circadian rhythms.
3) The emergence peaks of female were later than those of male, but the bimodal distribution did not stand in a causal relation to the sex.

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