Are new practices and techniques adopted simply because they're discovered and made available? "Not unless they're profitable," is the answer that research is giving. Here's an example based on the use of fertilizer in Iowa.
Yeh, Martin H. and Heady, Earl O.
"Why Do We Use "New Practices"?,"
Iowa Farm Science: Vol. 14
, Article 5.
Available at: http://lib.dr.iastate.edu/farmscience/vol14/iss4/5