Early Precision Agriculture?

Here's an extension report on the savings from precision agriculture from better information on the farming operation and more precise application of inputs of fertilizer, seed, pesticides, etc. which cuts the amount needed.  Coincidentally I was reading a book, I think Bill Bryson's At Home, which mentioned Jethro Tull and the invention of the seed drill, which cut the amount of seed needed from the 3 bushels used in broadcast seeding to 1 bushel in the drill.