Yang Jingmei, Qiu Jinheng. 2002. A method for estimating precipitable water and effective water vapor content from ground humidity parameters[J]. Chinese J Atmos Sci, 26(1):9-22.

Avoid dragging your harness on the ground, on rocks... etc. Extended exposition to UVA rays (sun), humidity and heat should be always avoided.

Sow directly in the ground, the plant diseases and insect pests that soil transmits is more, ground temperature is inferior, moisture and humidity are controlled not easily, affect gemmiparous rate.