The Field Calculators → Growing
Growing
Fertilizer & amendment rate
Turn a recommendation in pounds-of-nitrogen-per-acre into how much of the bag in your hand to actually spread.
Result
Area to cover1000 sq ft
Recommended rate1 lb N per 1,000 sq ft
First number on the bag (N%)10 %
Product to apply
10.0 lb
Over 1,000 sq ft.
Rate per acre equivalent
436 lb/acre
Actual N delivered
1.00 lb
Spread in
two passes at right angles
Half the material each way. One pass always stripes.
What this will not do
- Get a soil test first — $15–30 from your extension service. Without one you are guessing at the only number in this calculator that matters, and the common failures (too much nitrogen, wrong pH) cost you the season either way.
- More is not better. Excess nitrogen gives you magnificent leaves, poor fruit, soft growth that pests prefer, and runoff into the creek.
- The same arithmetic works for lime, gypsum and any amendment quoted per 1,000 sq ft or per acre.