HELP! Mysterious Large White Dots

Hey all, I'm growing a couple of outdoor plants using the Supersoil recipe. Recently several leaves have been showing large white dots the size of nerds candy on the leaves. Some leaves on the plant seem a bit more lime/yellow than they should be. I looked online but did not see any plant deficiencies that showed these sort of symptoms so I apologize if this is obvious to some.
My first thought is a calcium deficiency but the dots seem too large and they don't have the typical orangey brown color and the dots seem rather large. I've already checked for pests, so the only other things I can think of are some sort of micronutrients deficiency or chronic underwatering. Any thoughts and solutions would be appreciated thanks!

If it's an outdoor grow I think diseases and fungal infections might be more likely. Try googling "yellow leaf spot Septoria", it's a common fungus that causes yellow spots on leaves.

if that is septoria, pick off all the effected leaves,and use a good fungicide, i recently used "Rose RX 3in1" by bonide, which is neem oil based. it worked very well.
since its a fungus, it will drop spores on the ground in the area, and try to come back. using some good benes will help fight it off, and out compete it. get something like great white, with both trichoderma, and mychorizae, and work some of it into the ground in the area, with a light watering to get it going.

check this out, the rest of this larger article has been of immense help to me over the past couple of years
http://www.growweedeasy.com/yellow-leaf-spot-leaf-septoria
the whole article
http://www.growweedeasy.com/marijuana-symptoms-pictures

shit I'm afraid you two might be on to something...I went back and looked for more leaves, the photos seem very similar. Interesting that septoria only afflicts cannabis plants... From the reading I've done it seems there's no real way to cure a plant that has this affliction, you can only help it fight by keeping it healthy with bennies and full of nitrogen, which sucks when you're already in flowering. I used a compost tea a few days ago and haven't seen much improvement yet, I will probably try and do this a couple more times but I'm 5-6 weeks flowering so we'll see. I have included a few more pics, let me know if your diagnosis changes. Thanks for your help

Also btw, I just bought a pH meter, my water has always tested pretty high in pH (7.2-7.5) range. It's never been a problem in the past since my soil is buffered to 6.8-7pH pre-grow but I just set up a drip system and so I have been pumping a lot more water through the pots at watering time than in the past when I hand watered.

I haven't seen symptoms anywhere online that are eeeexactly like I am showing and so rather than just having a diseased plant I'm hoping this is an issue of operator error and that there is a learning experience in here somewhere that future growers and I can learn from Will keep posting.

So the plants have not been getting better but they have not been getting worse either either which is pretty typical when you have solved many problems in my experience. Things I have done to my plants include: Anti-fungal spray, PK and micronute dosing with light nitrogen dosing as well, and hand watering with pH'd water (5.7-6.3 pH) instead of my high 7's hose water. .

So one of two or three things is happening:

1. If there is a fungus, it is not spreading due to my addition of anti-fungal spray and light nute and nitrogen dose, but the damage to the leaves is already done. The dots on my leaves were always larger and more uniform than what I have seen online for yellow leaf septoria, but this is a possibility

2. OR there is some sort of micronute deficiency showing along with my natural 'end of flowering' nitrogen deficiency that appeared sooner than normal. This also might be due to the higher pH water that I have been using than in the past.

3. Finally, my new theory is that since the dots are so uniform across the leaves is that dew droplets or nute deposits from past foliar feeds may have built up on the leaves and caused light burns from the heat wave we had. Along with my nitrogen deficiency showing up a bit earlier than I expected due to my plants being much larger this year, I may have accidentally interpreted these different factors as a whole new singular type of problem.

I will keep posting through the next few weeks if anything changes, but for the most part, I seem to have solved my problem one way or another. Many thanks to the growers who took the time to give their advice. For any future growers who happen across this page, I hope this helps you brainstorm solutions to your problems.