Jing He, Yanan Li. Effects of humic acid on chlorophyll content and root length of ryegrass (lolium multiflorum lam.) . Bangladesh J. Bot. [Internet]. 2023 Aug. 31 [cited 2024 Sep. 27];52(20):467-72. Available from: https://banglajol.info/index.php/BJB/article/view/68196