The goals of which organization included providing education on new farming techniques and calling the regulation of railroad and grain elevator rates?

The answer is "The National Grange".

The Grange Movement otherwise recognized as The Patrons of Husbandry, or the Grange, which started in 1870s was a campaign for state control of railroads and grain elevators, its purpose was to progress ways of agriculture, and also to endorse the social and economic needs of farmers in the United States.