11. The raw data from the LANDSAT had been adjusted the intensity of band 3 and band 4 with linear equations. For provide the valuable information on the intensity between 0 - 255.
12. Multispectral from the LANDSAT in 7 periods Lower Yom Basin 9 th December 2008
27. Step 1 : Classified data from DVI in Multi Date (3 dates) Supervised classification into 5 classes Class 1 = Bared soil Class 2 = Seedling Stage Class 3 = Tillering Stage Class 4 =Maturing Stage Class 5 = Haversting Stage Step 2 : Intersect paddy field frame which derived from Land Development Department
28. Step 3 : Calculation paddy field area in each growth stage Seedling Stage
55. Conclusion Rice blast disease severity was decreased from January to May. Off-season rice growing area showed moderately disease severity in 33.02 of planting area. But showed low disease severity in 82.27% of planting area.
56. - Rice brown spot symptom was not found on December and January. But rice brown spot disease was increasing in infection area on February until May, in the low level of disease severity. - Rice narrow brown spot symptom was not found on December and January. But rice narrow brown spot disease was increasing in infection area on February until May, in the low level of disease severity