Strickler, an agronomist Croplan in the U.S., has indicated that the alfalfa seed companies are assured of not repeating the same mistake of the producers of corn and soybean seeds RR.
In the early years, corn and soybean yield had lower RR of RR crops. This is because the corn and soybean farmers have not been started with seed of improved varieties. "With the RR alfalfa, we have built from the first time in the best genetic lines," he says.
"In most alfalfa is removed after five years," he says. "If you can get thick stand at the beginning, I believe that RR crops can last for at least a couple of years more. People RR planted five years ago say it is still strong at this point, having started the first year with roughly a thick base. "
Source: www.agriculture.com
