The cost is about125,000 yuan, and the profit is between 500,000 yuan and 650,000 yuan. The cost of planting green onions mainly includes fertilizer, labor and seeds, etc. The fertilizer used for one mu of land is about 5 10 yuan, and the cost of watering, soil preparation and soil improvement is 240 yuan, and the artificial planting of seedlings is charged by 520 yuan. The cost of planting green onions for one mu is about 2,500 yuan, and the cost of planting 50 mu of green onions is about125,000 yuan, and the yield per mu is 6,000 to 80,000 yuan under normal circumstances. The average market price is in the range of 12000 to 16000 yuan per mu in 2 yuan. Excluding the cost of 2500 yuan, the profit of planting one mu of green onions is in the range of 10000 to 13000 yuan, and the profit of planting 50 mu of green onions is between 500,000 yuan and 650,000 yuan.