8,937 Siti Sarah Binti Mohd Sinin 2019-01-18 http://www.msss.com.my/mjss/Full%20Text/vol18/1_Kamarudin.pdf Kamarudin, N. K., Teh, C. B. S., & Hawa, Z.E.J. (2014). Modelling the Growth and Yield of Choy Sum (Brassica chinensis Var. Parachinensis) to Include the Effects of Nitrogen and Water Stress. Malaysian Journal of Soil Science, 18, 1-17. NULL