Posted: 15/08/2014 at 11:06
The answer is to improve the soil. Add in lots of manure, bark and compost to improve the structure. Do not walk on beds when you have done so. Over time it will be lighter.
Why do you need to use a spade so much? I only use forks (garden and hand) on my clay loam soil as I have lost so any spades at the beginning. My cheap as anything fork has lasted. I rarely need to dig anything up now and rarely use a spade.