Would sowing annual rye grass around in ground fig trees in late winter take the excess nitrogen out of the soil and tie it up to prevent early leafing out? Also what about planting crimson clover around base in summer to fix nitrogen?One more thing how about sowing turbo radishes around in ground trees in fall to drill holes in the ground, the radishes will rot in the ground during winter leaving holes for nutrients water and air to get to the roots

My guess is that radishes will be fine but anything else will compete with the tree for nutrients.  If you grew clover elsewhere and mulched the tree with it in the fall that's a different story  :)

Grant could you go a little into detail about the way you cover crop.  I know in a previous post you mentioned that you do cover crops.

I do clover rye grass and strawberries in my containers with the figs. I think it keeps the soil a bit cooler as well as provide nutrients to the tree.

I'm going to try some tillage radish, mustard, kale, turnips, winter peas and MAYBE winter rye in various places to get an idea of how they work in ground.  I want clover between the rows though.  Clover should be seeded now and can also be seeded on snow or during frosts.  Though figs do not need pollination in our region clovers attract honey bees and they are declining in numbers.

I never grew wheat (intentionaly) but this is interesting....got the idea from the Arabs who plant winter wheat around the olive trees.

http://www.sare.org/Learning-Center/Books/Managing-Cover-Crops-Profitably-3rd-Edition/Text-Version/Nonlegume-Cover-Crops/Winter-Wheat

Lewi that is interesting, I have been wondering about that as well.  I have some Red Hard Winter Wheat seed, in my zone winter rye would work better but isn't as awesome as winter wheat as a harvestable crop.  I was thinking I would try to eventually stick with just clover.  Are you obedient to Torah?  If so what is your stance on using cover crops?

I assumed you also were obedient to Torah.  I was wondering your approach as I have heard various opinions concerning Kilayim.  I have no tractor as well and have tried various methods of broadcasting seed around my property to make up for it.  So far it is a bit of an art but if one is mindful of the seasons and get a jump on crowding out the weeds it's amazing what can be accomplished.  I grow 100% organically so I make compost teas but not all season.  How many trees do you have in ground?