Education effect of temperature relative humidity quality of the soil and the sweetness of sugarcane This time aims to study the temperature relative humidity Quality of the soil and the sweetness of sugarcane at. District Na Chan and District Non Sa-at How to study the following. 1 Determination Point in the study is sugarcane at. District Najan Amphoe Si Chomphu Province Khon kaen. 2 Measurements of temperature and humidity every day time 12.00 am of the day 7 December.2557-17 January.2558 And measured soil The sweetness of sugarcane of the day 17 January.2558 save data. 3The data were recorded to produce a graph and comparison charts.