however this condition might not be sufficient to change the irrigation practice of fanners especially for rice and wheat for which dripirrigation systems are not yet used singh since then only solar pumps were installed by farmers in the state since subsidies were often not substantive enough to motivate the investment roy nevertheless the state and central governments are pursuing their support programmes and the cost of solar panels is falling which suggests further development of solar pumps threatening to increase the depletion of critical aquifers