I plan to amend the soil with wood chips by tilling them up to 40cm into the soil(should I go depper?) , going heavy on nitrogen fertilizer and planting alfalfa while decomposition takes place. I did the math, and in order to increase the organic matter by 5%, I need to add about 25kg per square meter.
That is a lot wood chips. Is there anyting to be aware of regarding use of wood chips for soil amending purposes? Are there any bad side effects? Once decomposed, will the soil have too much fertilizer?