Hi, if you have a portable saw mill or bigger or maybe know someone that has you can cut it into planks, store it with sticks between each plank to let the air through it. You should protect it from rain at the top and also out of direct sunlight. I t is best to seal the ends but normally you can cut a few inches off either end to get rid of any small checks when it is air dried. Generalising wood dries at the rate of an inch a year so if its a three inch plank then it will need about 3 years.
You can store it in the round for as long as you like but it will never dry out properly until you cut into sections and end turn on a lathe. Leave inthe largest lengths you can, I see lots of people cut trees into 4 or 6" pieces, the pith, heartwood and sap wood all then dry at different rates and it is only good for firewood. An old tip is to cut it into sections twice its diameter.
I turn most of my wood green, but you can store each section on its end (and end seal or wax top and bottom and stand on sticks or a pallet to keep off the ground) until you can blank it that is put on the lathe and take down to say double the wall thickness that you eventually need. Make sure that the sides and bottom are uniformed i.e. the same thickness or you will have some pieces drying quicker than others and there a good chance it will crack.
You must control the drying so straight away put in a large paper sack (potato sack), there are other ways you can store in shavings, I even know people that have buried their blanks in the ground !! not sure if it works though. Some turners boil their wood succesfully but it is all initially trial and error and after a few years you will hardly loose anything once you have perfected the drying process.
Specifically re your burr you will see that you need to make up your mind what to do with it either plank it or section up and store it depending whether you will use it or if you will sell it, as above I always turn burr green so do bear that in mind if you are selling then nows a good a time as any and you let others worry about the drying process. Hope that helps any questions please ask.
Kraftinwood
Woodturning Large Bowls and Hollow Forms, Australian and Native Burrs.