The Grass Doctor

Fertilizer question... Ag Science. Modern Crop Production?

A soil test for grain sorghum calls for 100lbs/acre Nitrogen, 80lbs/acre Phosphorus, and 140lbs/acre Potassium. You go to your local fertilizer dealer who has Urea (45%N), Triple Super Phoshate (0-46-0) ans Ptash (0-0-60). How many pounds of each fertilzer would you need to be mixed together to meet your soil's needs on a per acre basis.

Public Comments

1. 100lbs/acre Nitrogen > 100 : 45 x 100 > 222,22 lbs/acre Urea 80lbs/acre Phosphorus > 80 : 46 x 100 > 173,9 lbs/acre Triple Super Phoshate 140lbs/acre Potassium > 140 : 60 x 100 > 233,33 lbs/acre Ptash 222 lbs Urea, 174 lbs Triple Super Phoshate and 233 lbs Ptash per acre should be mixed together.