a) When you apply a more complex form of nitrogen (like feather meal) is added to the soil, what critical steps (chemical and biological reactions) must the feather meal undergo before it becomes available to the plant.he soil to reach the point at which the plant will take it up in the nitrate form...ie. Describe the three (3) stages of mineralization in the order in which they occur. b) List 3 typical environmental conditions that might interfere with this process and why/how they affect this series of reactions.