well you all have succeeded in blowing my little mind,im difrent from all yall,i use manures to grow with,i do get a npk test done at the start of my new soils,then its manures and critters,dont have the means for scopes and all that,so im with eco,go with what works best for you,manures compost and microbes work best for me in my little area,,i can say this ,i use ecos products and my plants love it,out in the yard is were i use the manures,there is no way for me to afford eco stuff out there cause i have to much,but im a glutin for punishment,hahah i feed 10 folk with what i grow,1 day i hope to go to the farmers market,time will tell,,but before NPK was popular what did folk do?word of mouth and trust in judgment of other farmers methods right,if you bring and hold life in the soil it will produce for you,might not be a lot but 1 bean can be 500 beans next year,when produce is down you automatically thing there is a problem ,usally is,but weather has a very strong hand in all this,with that bad yeild,i would go to the manures and compost,dont have a clue what npk and all it has,but know it works,,so long story short,i dont imagine a magic bullet for the perfect idea,but open minded to hear it all,as above,word of mouth,,tell ya something else that counts for bad yeilds that no one has hit on,neglect,,i got a very bad back and do all i can and come out enough to feed mine,,but damn if i could do this for the public,lmao