I had learned about agroforestry in several classes in university. Agroforestry is a sustainable landmanagement system by combining forestry and farming or animal husbandry on the same unit of land.
This time, I had a chance to visit the Trat Agroforestry Research Station. The assistant chief of the station kindly explained to me a lot about his research.
By combining trees and crops, we can except synergetic effect of good harvest and good environment because trees keep soil, water and microclimate. But if trees and crops compete each other for water, nutrition and sunlight, it won't work well. So far, Rubber and banana, Coconut and coffee, Teak and corn etc are good combination he said. On the way back to Chantha Buri, I found the rubber forest with banana trees in-between from the car window.