1,621 Nurul Nadia Binti Ya'akob 2019-01-03 https://www.hort.purdue.edu/newcrop/duke_energy/Alopecurus_praetensis.html Purdue University (2017). Alopecurus pratensis L. Retrieved from https://www.hort.purdue.edu/newcrop/duke_energy/Alopecurus_praetensis.html#Yields%20and%20Economics Revised record 27.9.2019.