Nutrient Uptake Chart: fellow grow geeks are gonna love this

Found this chart online. Such good info. Shows you how important ph fluxuation is! The "ideal" ph isnt ideal all of the time. Check it out:

http://www.gardenscure.com/420/attachments/plant-nursery/167412d1147031941-nute-deficency-nute-burn-ph-nutrient-availability.gif