First of all, I applaud you for expanding your knowledge into several areas.  It will serve you and your customers well.  I agree with the comments that we need tech people who are tech specific because the changes are so fast coming and constant that it is hard to be a tech pro, agronomy pro, seed genetics pro, etc. all at the same time, BUT to say that I don't need to my seed rep to know anything but his/her seed genetics is asking for a rep who isn't very motivated to learn.  My best reps are those who apply themselves in many areas, not just the area they are "supposed to know."   Since when is less knowledge or wisdom an advantage in our occupation? 

As for writing prescriptions, I too like to write my own.  I figure that I know the fields better than anyone and I can see things in yield maps that others miss, but "big data" is changing that.  Our monitors, sensors, location data and on and on are able to detect differences on a smaller scale that were not seen before their existence.  Computers are able to process differences due to genetics, pops., soil tests, tillage/drainage practices .................and many other layers of data and draw correlations and even probabilities that can change what a prescription should look like.  I have confidence in what I know, but I hope that doesn't make me blind to the fact that there's a lot I don't know.  Variety placement will change a lot in the coming years due to big data.  Having companies and reps who can apply that knowledge should lessen some risk in this business and isn't minimizing risk or maximizing opportunity a profitable goal?

One last thing -- I deeply appreciate those reps and suppliers who are sensitive to what it takes to get things done on a timely basis and how critical that is to our bottom line, but I also get a little peeved with the lack of consideration some have for the time of others.  It is great that I can get seed at 6 p.m. or whenever on a Saturday night, but emergency aside why should my lack of planning or management create an environment that says my suppliers be at my beck and call like my needs are more important than others.  If I can't see that I'm going to be short of seed long before Saturday night, there's a problem with the home team, NOT the supplier.  It might be good for suppliers and farmers to change roles for a season.  We would probably find ways to be more considerate and make each other more efficient.  :)