First Al, I don't know if it will work or not, but the idea of that setup is to spread the vigor of the vines, The wires are just what you said and the whole row was set up VSP. That is one row of the grant study. I want to add more shoots to try to cut the vigor of all of them and thus keep them under control. Will it work? Don't know, but that the reason for the study.
Second Bill, why the fert now? Because it is very sandy soil that holds little fertility. I need it to supply spring growth and set the blossoms up for in a few weeks. If I wait, it is too late. It is just general purpose 15-15-15 with micronutrients. I hear the groans now, but that's what went on them. This application is meant as being a base fertilizer for the year. It has enough of everything in it to support roots, top growth and fruit. It's not enough for the whole year, but I supplement later as needed.
I put on my first application of spray for the year since U have a foot of growth. I applied 3 pounds Manzate 75DF, 4 ounces Elite, and 1 quart liquid Carbaryl (tanished plant bugs). That pretty well covers everything out there. It was then or not at all before bloom, and I felt I wanted the protection there with a week of rain headed our way.