Crop

1940 Years

(kg/hm²)

2020 Years

(kg/hm²)

Increase/each year (kg/hm²)

Total increase

(Times)

Plant type

improvement

situations

Corn

Race

Soybean

2786

3506

2546

16,000

12,000

4000

165

106

18

5.74

3.42

1.57

2

1

0