Yes. That was part of the problem. Who decided that only one monoculture crop would be used to feed the population? According to the link above posted by jedishrfu, Ireland also produced oats. With 32% of its land being arable, it should be have been self sufficient if it had a diversified crop, not to mention producing some animal sourced protein. Where were the decisions being made in terms of what to plant and what to export?
My point is that the blight was a natural phenomenon, but need not have been a disaster; at least in Ireland.