The origin of Cyamopsis tetragonoloba is unknown, since it has never been found in the wild.[1] It is assumed to have developed from the African species C. senegalesis. It was further domesticated in India and Pakistan, where it has been cultivated for many centuries.[2] Guar grows well in arid to semiarid areas, but frequent rainfall is necessary. This legume is a very valuable plant within a crop rotation cycle, as it lives in symbiosis with nitrogen-fixing bacteria.[3] In fact, agriculturists in semi-arid regions of Rajasthan follow crop-rotation and use guar as a source to replenish the soil with essential fertilizers and nitrogen fixation, before the next crop. Guar as a plant has a multitude of different functions for human and animal nutrition but its gelling-agent-containing seeds (guar gum) are today the most important use.[2] Demand is rising rapidly due to industrial use of guar gum in hydraulic fracturing (oil shale gas).[2] About 80% of world production occurs in India and Pakistan, but due to strong demand, the plant is being introduced into new areas.