RAISED VEG PLANTER SOIL

Can someone please advise what I should add to my raised planter soil. Last summer, my 1st year I planted the usual salad vegetables and celery and through the winter  have grown leeks and purple sprouting brocolli. I have noticed that the level of soil has gone down a couple of inches. When the latter have finished should I just top up with good compost soil or  should I be adding manure or other nutrients? many thanks

Add manure or chicken pooh pellets. I also top up with compost.

Thankyou. What about some seed weed nutrient?

I agree with Rosa, I do the same and add some homemade compost.

Hi i add some compost to mine to top it up and on the larger ones i add manure but i like it to be well rotted. all the best. 

hi i find seaweed is fantastic on my raised beds i add it every year when the soil level drops and compost is great as well.

,  It was my 1st visit to the forum  thank you all for your replies.

chica wrote (see)

hi i find seaweed is fantastic on my raised beds i add it every year when the soil level drops and compost is great as well.

Is that shore gathered seaweed?