Article: Sichuan has been historically known as the "Province of Abundance". It is one of the major agricultural production bases of China. Grain, including rice and wheat, is the major product with output that ranked first in China in 1999. Commercial crops include citrus fruits, sugar cane, sweet potatoes, peaches and grapes. Sichuan also had the largest output of pork among all the provinces and the second largest output of silkworm cocoons in 1999. Sichuan is rich in mineral resources. It has more than 132 kinds of proven underground mineral resources including vanadium, titanium, and lithium being the largest in China. The Panxi region alone possesses 13.3% of the reserves of iron, 93% of titanium, 69% of vanadium, and 83% of the cobalt of the whole country. Sichuan also possesses China's largest proven natural gas reserves, the majority of which is transported to more developed eastern regions.

Now answer this question: What are the major agricultural outputs of Sichuan?
rice and wheat
The context states Sichuan is known as the "Province of Abundance" and that it's among the major agricultural production bases in China. It then lists out a number of items including rice, wheat, pork and silkworm cocoons which are produced abundantly by Sichuan province. 
Thus, based on this information we can infer that rice and wheat are some of the major agricultural outputs of Sichuan Province.