Hi

10-10-10

Mean that in your'e bags you have

10% of N by weight
10% of P2O5 by weight
10% of K2O by weight

For a 50 pounds of fertilizer you have 5 pounds of N, 5 pounds of P2O5 etc....

Don't forget, the soil analyses give you're results in ppm or kg/Ha of P or K alone.

To convert kg/ha of P in kg/Ha of P2O5 you have to multiply the P weight by 2.29
To convert kg/Ha of P in Kg/Ha of K2O you have to multiply the K weight by 1.2.

Be sure that the requirement of your'e nutriments for a specific plant are expressed by weight of P2O5 or weight of P alone....

For a new field of alfalfa or clover you can add an extra 35-50 pounds of N/acre.

Info. website

http://ndsuext.nodak.edu/extpubs/soilfert.htm


Yann