The document discusses calculating assumptions for soil and rice cultivation suitability for the System of Rice Intensification (SRI) method in the Philippines. Maps of soil texture and slope were overlaid in a GIS system to determine areas of heavy soils with poor drainage versus light soils with good drainage. These classifications were then used to identify locations most suitable for SRI cultivation based on their ability to provide good water control.

7. SRI Municipalities of Isabela Province HS = Heavy Soils LS = Light Soils, GD = Good Drainage PD = Poor Drainage

9. SRI: BARANGAY OF TUMAINI HS = Heavy Soils, LS = Light Soils, GD = Good Drainage, PD = Poor Drainage)