11lb Diamonnium Phosphate DAP Yeast NutrientDAP (diammonium phosphate) is a major source of nitrogen for low malt or sugar rich mashes and washes. Recommended to add the dose in stages during the first half of fermentation. DAP stimulates fermentation rate, so if too much is added at once, the yeast may ferment too fast and too hot. 21. 2% ammonia nitrogen 100 ppm (10 g hL) DAP = 21 ppm nitrogen 1 lb 1000G = 25. 4 ppm N