New Delhi, March 4 -- The war in West Asia is roiling the fertiliser business in India, with imports being hit by an increase in shipping costs and the closure of a key route, and domestic manufacturing being crimped by shortage of gas, analysts and fertiliser industry executives said. Deals for fertiliser imports are typically finalised during December-February for the summer-sown season, but with shipping costs doubling and no vessel being able to clear the Strait of Hormuz, a globally critical chokepoint for most shipments, the situation is dire, analysts said. The domestic crop-nutrient industry is staring at another key risk - a shortage of imported gas supplies, which fire fertiliser plants. Qatar on Monday paused production of liquef...