List of profits of various crops in summer
Pineapple: 2/kloc-0 /×12× 4× 2× 500-12×1000 = 896000 (yuan)
Corn: 2/kloc-0 /×12× 4× 5×100-112× 300 = 470400 (yuan)
Tomato: 2/kloc-0 /×12× 4× 7× 60-112× 200 = 400960 (yuan)
Pumpkin: 2/kloc-0 /×12× 4× 2× 250-112× 500× 2 = 392,000 yuan.
Onion: 2/kloc-0 /×12× 4× 80-12×150× 4 = 255360 (yuan)
Conclusion:
Growing pineapples is the most profitable.