Harvard Medical School's website provides calorie expenditure estimates for weight training. A 30-minute weight-training session burns about 90 calories if you weigh 125 pounds. If you weigh 155 pounds, the same weight-training session will result in 112 calories burned. Aerobic exercises burn calories at a notably quicker rate than weight lifting.
Note that this is a ratio, not the formulae you are looking for. So, a 15:5:15 ratio would be ideal (note the ratio of 3:1:3). The company Scotts has just released what appears to be an ideal palm fertilizer with microelements, magnesium and calcium. Consider buying a slow release fertilizer. It is more expensive but probably better for the plants and less labor intensive.
Type of Fertilizer. The nutrient most needed by St. Augustine Grass is nitrogen. The amount of nitrogen in fertilizer is indicated by the first number in the fertilizer analysis on the bag or container of fertilizer. For example a 10-5-5 fertilizer is 10% nitrogen active ingredient.