Gurbachan Singh, Harinder Singh, and Jaspal Singh. 1997. “EFFECTS OF <em>POPULUS</em> <em>DELTOIDES</em> LITTER ON ITS SAPLINGS, ASSOCIATED AGRICULTURAL CROPS AND THE PROPERTIES OF AN <em>ALKALI</Em> SOIL”. Journal of Tropical Forest Science (JTFS) 9 (4):536-45. https://jtfs.frim.gov.my/jtfs/article/view/1708.