## Best answer

Fertilizer analysis refers to afertilizer’s formulation of the three macronutrients: nitrogen (N), phosphorus (P), and potassium (K). It is commonly referenced as N-P-K. Most bags of fertilizers feature an N-P-K fertilizer analysis of 5-10-5 or 18-9-9.

## People also ask

### What is a guaranteed analysis of fertilizer?

The guaranteed analysis(or fertilizer grade) is a listing of nutrients contained in the bag, by weight. The first number of the analysis lists % N, the second number represents % P2O5 (phosphate), and the third number % K2O (potash). The guaranteed analysis of the fertilizer in the above example is: 18-6-12.

### How do you calculate nutrient content in a bag of fertilizer?

Calculating Nutrient Content. To calculate the pounds of nitrogen in a 50-lb bag of 10-10-10 fertilizer, multiply 50 by 0.10. Do the same for calculating the amounts of phosphate and potash. A 50-lb bag of 10-10-10 contains a total of 15 lbs of nutrients: 5 lbs nitrogen, 5 lbs phosphate and 5 lbs potash.

### What is the N-P-K of fertilizer analysis?

Most bags of fertilizers feature an N-P-K fertilizer analysis of 5-10-5 or 18-9-9. Fertilizer analysis is important to gardening because the formula required by plants differs from lawns, perennials, shrubs, trees, and flowers, as well as vegetable and fruit gardens.

### What is the ratio of fertilizer?

The ratio of a fertilizer is an important characteristic to understand. The ratio of a fertilizer is the relationship between the N-P2O5 – and K2O content of a fertilizer. The ratio of the fertilizer in the example above is 3-1-2. A fertilizer with a 3-1-2 ratio contains one and a half times as much N as K2O and three times more N than P2O5.