What is a garden plot called in which corn is planted next to nitrogen-restoring alfalfa? 

A)  It is agroforestry. 
B)  It is intercropping. 
C)  It is a polyculture. 
D)  It is polyvarietal cultivation.

Nitrogen-Restoring

A process or practice that helps replenish nitrogen in the soil, often through natural means like the planting of leguminous plants or through technological interventions.

Intercropping

An agricultural practice that involves growing two or more crops in proximity for purposes such as pest control, pollination, and to increase productivity.

Alfalfa

A leguminous plant with clover-like leaves and bluish flowers, widely grown as forage for cattle and as a nitrogen-fixing crop, enriching soil fertility.