In a cropping sequence of maize-wheat-moong the cropping intensity should be

Cropping intensity is the number of times a crop is planted per year in a given agricultural area.
Cropping intensity $$ = \frac{{{\text{Gross cropped area}}}}{{{\text{Net sown area}}}} \times {\text{100}}$$      $$ = \frac{3}{1} \times 100 = 300$$
In a cropping sequence of maize-wheat-moong, the cropping intensity should be 300%.