hi From these fertilizers, which one is better? As regards the price, transportation, nitrogen percent, easy dissolving in the water & easy attraction from the plants. Nh3 (Ammoniac) Nh4no3 (ammonium nitrate) (nh4)2so4 (ammonium sulfate) (nh4) h2po4 (nh2)2co ( Urea ) please explain completely why did u choose urea