4. Results and Discussion
The Ordinary Least Squares (OLS) regression was used for modelling and prediction of soil salinity in the root zone. Data from first two dates (4th and 27th December 2019) with all parameters was used to train the model while validation was done using the data of 20th January 2020. A correlation heat map shown in Figure 7, shows the correlation between the different parameters used for modelling. It also shows the strong correlation between different satellite and on ground sensor parameters with soil salinity indicators of EC and NDSI-