It means 47% protein or around or 7.52 % nitrogen. which is very high for Organic. 47 X 6.25 = 7.52

ok so i went to different store. seems there is quite a few around here now that i did search. they had cootnseed meal 41%, soybean meal 33% and alfalfa pellets 13%. i played it safe and got alfalfa. what is good percentage? is there a benefit of using different stuff every time? guess i am stuff with alfalfa if other two has too high percentages.

I don't think you are understanding. More protein is better. Alfalfa is a excellent choice although IMO you will have to use more to get a satisfactory response. I would put down around 20 pounds per 1000 sq ft of alfalfa, and 10-15 pounds if you get soy. Alfalfa has a very good NPK ratio as well as lots of iron.

ok, i guess i misinterpreted when you said that 7.52 is very high. i thought you are not recommending it. oh well. i just spread alfalfa today. my lawn is around 3000sf and i spread 50lbs. so i will get some more tomorrow.