The 2017 USDA Agricultural Census data for Berks County is summarized in the County Profile. The complete 2017 USDA Agricultural Census data may be found here.

The agricultural commodities are Berks County are diverse, with top leading sectors as follows:

1. nursery, greenhouse, Christmas trees, and sod; 
2. poultry and eggs;
3. milk from cows

Information from USDA 2017 Census of Agriculture 

USDA Census of Agriculture National Agriculture Statistics Service

Find full agricultural census data and other information here.