As a result of the investigation as to the damage-extent to crops at the shady corner of the shelter-hedge, we have cbtained the following data;
1. Though less effect in summer, on the north side of the W-E hedge the shady nook has more effect in winter than on the west-east side of the N-S hedge.
2. Intensity of illumination in the shade records from 1/5 to 1/15 of that in the sun.
3. Close to the hedge is a sunny place which reaches as far as 0.5 to 1.0 (horizontal distance in hedge-height), and it is 5°C through 7°C warmer there in the sun than in the shade, with greater difference especially in the W-E hedge.
4. In winter the maximum range of the underground temperature between in the sun than in the shade is 14°C in the N-S hedge, 19°C in under the W-E hedge, and in summer 7°C in the N-S hedge, 2°C in the W-E hedge, but such a difference in temperature is unseen in the depth of 15cm to 20cm under the ground.
5. In the lee side tenfold distance of the hedge-height dies away no less than 20% of the amount of evaporation, whose decrease proves affected even in the lee fifteen times the hedge-height away.
6. Around 30% of harvest both in summer and winter decreases under the north side of the W-E hedge and under the south side, too, about 15% of uplandrice-crop decreases, while wheat-crop shows a little increase. Within the scope of one time the hedge-height in both sides of the N-S hedge, uplandrice-crop shows 30% decrease and wheat 14% drop.
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