On the Determination of Favourable Climatic Zones for China Grass (Ramie) Culture Japan Proper

Abstract

Relation between weather and yield of ramie has been frst investigated and then by considering the results of investigation were determined favourable zones for ramie culture as seen from the climatic environment in Japan proper.
Statistical data of ramie culture in Japan was not given completely, therefore correlation coefficients between elimatic factors and yield of ramie were calculated from comparing with the climatic factors and ramie yield in the both years which differences of yield on that year and on the previous year are conspicuous positively or negatively
The correlation coefficients are as shown in table 3, 4. & 5.
The correlation coefficients indicate generally that relation between weather and yield of ramie in the southern part of Japan differs from that in the northern art. Namely, favourable weather for ramie culture in the southern part is rainy for that growth of ramie plant was not damaged by drought, while in the northern part is sunny for that temperature is enongh to growing the ramie plant. As the climatic environment in which ramie for fiber is cultivated favourably, are given high air temperature, moderate rainfall and high humidity throughout the growing season of ramie plant.
From the local peculiarity of climatical suitability for ramie culture were determined 8 division in Japan proper as shown in Fig. 3.