Kenkashi Soil Conditioner is one of my favorite Kenkashi products.  I use this a lot in my landscaping and tree preservation work.  If you're working with fill soils that are devoid of nutrients and have weird pH, please contact us and we can help you use this product to get those soils viable as soon as possible. 
By adding microbes to your soil you are saving money on fertilizers.  The microbes will do the work for you helping your plants access macro- (NPK) and micro-nutrients.  Depending on the quality of your soil initially, you may need a few treatments or a couple of years of treatments.  Either way, the goal is to get your soils self-sustaining.