I have about 800 lime trees, more than 10 ft high and about 7 years old. Since last two years, these are full of blossoms but in 2011, only 400 kg of lime and this year only 680 kg of lime. I took care of watering, fertilizer, etc. but unable to know the reason of blossoms falling/convesion to fruit. My trees are in District Multan of Pakistan, where weather is dry and warm almost for more than 7 months.