From 1879-1929, how much did the acreage of harvested crops increase?

In between 1879 to 1929 almost 35 to 55 million acreage of harvested crops increased because in this time period all the modern machineries were introduced with highly developed agricultural technology with proper soil survey techniques.

Explanation:

In between late 19th and early 20th century agricultural sectors witnessed and highly developed technological advancements in the field with the introduction of modern machineries and efficient labors which increase the yield per acre of land and as a whole also.

The yield increased upto 35 to 55 million acreage. Agricultre boost up the economic system of the country and harvested crops started exported to another country wherever it got surplus. The deficit areas of the world got full supply of these products.