Reduction in purchasing, this was also brought about by the fact that in June to August, stores buy for Christmas 1930. The banks would not lend to the stores and the manufacturers would not lend to the businesses. Thus causing the business to fail.

Drought conditions were a part of it, but by spring 1931, when farmers needed cash to buy seed and other farm supplies, the banks were gone from those loans. In an America where more than 50% still lived on the farm or in small towns, this was disastrous

This is only filler, your outline and cascading event style of writing for it is correct and easily readable..