Pumpkin cover crop

Hello everyone!   I have got a question for you all. I am growing pumpkins, transitioning to no till. Planning to grow winter rye, vetch, clover to over winter and hand crimp somehow in the spring (havent thought that far ahead but if anyone has any advice chime in! )    

I got a soil test which said, organic material low, calcium low, nitrogen low. My question, should I put down a layer of manure compost prior to planting the cover crops? Or do you think growing the cover crops will be enough to improve the soil for next seasons growing.  Let me know what you all think! Id love some input. No-till pumpkin growers...if you have experience and would be willing to chat via phone let me know.

Thank you!

I cut the grass or cover crop with a scythe and add additional grass  if available.  I then covered it with old carpet.  Trans planted pumpkins in the seem between 2 strips of carpet. Then got out of the way before I was strangled.

High Taylor. That is a mighty fine cover mix you have there. I wouldn’t add any amendments now because the plants you’re growing won’t need the help. Three years ago I didn’t plan for enough winter cover so I went in search of rye. I ended up getting some seed on the side of a red clay hill I hadn’t planned to mess with. Late the next spring I had a thick, three foot tall stand of ryegrass!
I made a crimper that year too. I used a four foot 2X4 with a four foot piece of angle iron screwed into it. One side faced down to do the cutting. I then attached a rope on each end to hold and started crimping. The 2X4 broke last spring so I’ll be making another next season.