Raspberries are actually surface feeders and if that doesn't sound too much like fish.
So dig a trench or at least a few holes and stick the plants in. Now they are wood land plants, so they like there roots to be moist or at least not to dry out. So:
1) don't fill the trench fully in - leave a little depression to hold water after it rains or shove the hose pipe in if it hasnÃ¢â‚¬â„¢t rained.
2) Get some humus with the fertiliser. If you have compost great - otherwise ask at the local garden centre. And put it on top! This humus containing fertiliser will keep the roots nice and humid plus feed the roots which are near the surface.
Now be moderate with the fertiliser otherwise you will get massive plants and few fruits. Raspberries are actually quite gross feeders and greedy- so the best idea is to shovel give some now and some latter in the year, say just as the fruits become moderately large but still white.
Now as they are surface feeders, don't hoe and you break the roots. I am afraid you have to hand weed, gently. Wait until the soil is damp and just pull the things out.
Raspberries are quite tough but need a good air circulation around them. If you have trouble with this and can you reply as there are two methods of growing.