Bangkok Agricultural Extension Office 105 4 10 * 100 1. * 1 2. ** * 4-6 * 12-20 1. ** 1 2. * 90-100 60-70 3-4 * 100% 1. * 2. 80-85% 3-5 3. * 4. 50% 5. 6. * 7. - - - - - - - * - - - * * 1 : 5