Mike is right autumn is the best time to apply the manure, and I also like to apply the mulch then as I use spent straw duck and chicken bedding, applied in the autumn it helps keep weeds down over winter, and stops erosion from heavy rains, rain dilutes and washes the manure into the soil, worms come right up to the surface of the soil to incorporate and digest the mulch leaving the soil in really good condition under the mulch. In spring the rain has washed the straw clean, any weeds that have pushed through the mulch are really easy to pull out, ( even bindweed ) and remove, I plant things in loo rolls in the greenhouse then harden off and plant them through the mulch just clear a spot, plant, and then ease the mulch around the plant again. The mulch adds humus and feeds and keeps roots moist, any weeds are dried off on the paths and then as long as they haven't seeded added to the mulch, along with lawn clippings and spent crops I am gradually converting all my beds to mulch, having tried it I am convinced, if you mulch over raised beds you can plant the sides as well as the top, and it works well for both drought and flood.
http://www.youtube.com/watch?v=ugFd1JdFaE0
Sit down before a fact as a little child, be prepared to give up every preconcieved notion, follow humbly wherever and to whatever abyss nature leads, or you shall learn nothing.
By Thomas Huxley
http://www.wildrye.info/reserve/