Plants are autotrophic. Can you think of some plants that are partially heterotrophic?

Plants are generally autotrophic . Can you think of certain plants that are partially heterotrophic ?

Sugar cane, Banana ,Ginger and Onion are following plants. But these are mostly cultivated by vegetative propagation. Can you identify which part of above plants are used for vegetative propagation.

Farmers cultivate pea plant as an intermediate crop in the paddy fields. After harvesting they remove all parts of the pea plant from their crop land Do you think the action of removing all parts of the pea plant from the field as a good agriculture practice.