Lixir's farming model is in large part similar to Curve's farming model, and hence relies on a system of 'liquidity gauges' that tracks each liquidity provider's share in each of the Lixir Vaults. Each gauge is given a 'type weight' that will either increase or decrease that gauge's share in the total farming emission w.r.t. the other gauges. By staking your LV tokens in the corresponding gauge, you're rewarded proportional to the amount of liquidity you're providing.