I do not want to expect an effect

Because these past several days 1 ordinary temperature continued, I coated it in a part of the tea plantation.
As a wintering disorder of the Sayama district which is said to be the tea production center of the economical northern limit, there are frost damage and a cold drought disaster.
Outbreak mechanism of the cold drought disaster of the tea is that water supply from the soil is obstructed by various factors by low temperature lasting for a long term.
Preventive measures against this damage include what’s called coating to a tree body
 

Excessive light under the low temperature is controlled by coating it in lawn about coating in the winter season of the tea, and, as a result, there is the result that it is high, and the photosynthesis ability of the mature leaf is kept, and first tea yields increase.