Bowichean, R., Thanachit, S., Anusontpornperm , S., & Kheoruenromne , I. (2013). Green Manuring Effect on Yield of Cassava-Sweet Corn Sequential Cropping on Degraded Sandy Soil, Northeast Thailand. Agriculture and Natural Resources, 47(3), 342–357. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/243063