Fertilized and applied compost at home

Today I used the fish emulsion to fertilize the N. and W. garden beds at home, plus pots and citrus trees (except missed one on the side yard).  I also applied compost to the two lower mandarins.  The lowest one is still looking less than thrilled with life.  When we planted it initially (was it only a year ago?) the dirt there was shockingly pale and whitish/chalky.  I wonder if that is impacting the tree.