Amnat Suwanarit, Nualchavee Roongtanakiat, Jarong Rungchuang, Somporn Thongdaeng. 15N-Aided Studies on Effects on Maize and Balance Sheets of Different Form of N Fertilizer. Agr. Nat. Resour. [internet]. 1996 Jun. 30 [cited 2025 Apr. 14];30(2):232-40. available from: https://li01.tci-thaijo.org/index.php/anres/article/view/241152