N-Ext Humic 12 vs. Simple Lawn Solutions Root Hume - Main Differences and why I prefer N-Ext Products over Simple Lawn Solutions. Humic can help with soil composition, improving soil structure, and overall health to inhibit a better lawn, but it takes a lot of time, so be patient! Also, many think this is a one and done application, but will need to be committed to apply a few applications to see any results.