Answer:
Another theory about why consumers are spending less on agricultural goods is:
Thanks to the free trade agreements between the US and other countries with a more centralized production in specific agricultural products, for which said products enter at a cost below the cost of national production, consequently, a lower cost for the consumer.
Explanation:
There are countries which agricultural goods production is more focused in a product, for example, suppose that the USA has a free trade agreement with Argentina, where the potatoes production is completely focalized, the reason why his production is cheaper than in the USA (by a economy of scale), then, when that good arrive to the country, will be cheaper than the national production and the consumers will pay less than before.