Even in good years, mangoes are considered one of the most difficult fruit crops to cultivate. They depend on a delicate balance of climate, tree physiology, and farming techniques. Getting that balance right is crucial for India, the world's biggest producer of mangoes, where 23 million tonnes of the fruit is harvested every year - almost a fifth of India's total fruit output. But for many farmers mango cultivation has, in recent years, become more challenging. "Mango farming has become