The stabilization of loose soil is a challenging task for sustainable infrastructural development and green environment. The traditional techniques to induce cementation in loose soil have limitations of their adverse effects on the environment and biodiversity. In this regard, it is important to stabilize the soil with such a material which has high engineering performance, less environmental impacts and is cost effective. In this paper, Xanthan gum (biopolymer) having a well-known characteristic of pseudoplasticity was used to treat loose sand collected from Muscat, capital city of Oman. The specimens prepared by mixing biopolymer with the sand were cured for 7, 14 and 28 days at 60oC in controlled laboratory environment. The time-dependent shear strength parameters were determined by performing direct shear tests on loose untreated, cement treated and biopolymer treated sand. The results indicated that a small proportion of biopolymer treatment to Omani sand had a high strengthening effect which is comparable to the treatment with a high proportion of cement. However, in the environment friendly perspective, cementation induced by biopolymer takes precedence over the Portland cement. Biocementation induced in sand contributed more to enhance the cohesion in the observed time given for curing and followed dilatant behaviour. The qualitative description of biocemented sand elucidated by microscopic study inferred the enhanced shear resistance to the connection of sand particles through biopolymer. The authors believe that present study will contribute in the development of techniques for the application of biopolymer in ground improvement.