Inorganic fertilizer and earthworms
I have heard that adding inorganic fertilizer to soil has negetative effects on earthworms. Based on my experience I question this.
I am not an "organic gardener". I do slow compost and add lots of organic material to my garden every year. I do not use pesticides, but do use inorganic fertilizers.
I have a sweet corn patch that is 15x15 ft. that I have added 10 lbs of 20-10-10 every spring for the last 4 years. The fertilizer is fast release from the local farmers Co-op. If you calculate the application rate for an area this size you will realize that it is an extremely high rate.
My sweet corn does great every year, large robust plants, huge ears of corn. My soil is full of earthworms (most of them non-native of course). I have not noticed a decline in the worms in 4 years of adding inorganic fertilizer at these rates. Isn't the salt flush from the fertilizer supposed to repel the worms? I do not see it. Can anybody provide me some scientific data on this topic?