For a full-size plot combine:
- 8 lbs. calcium nitrate or ammonium sulfate[1].
- 100 lbs. compost or manure[2], enough for about 1.5 inches.
- 25 lbs. gypsum
Till or dig into soil.
Water deeply.
Wait a few days before planting.
Wait at least 1 week to plant seeds.
For your safety, wear a mask when working with fertilizers.
If you have raised beds or multiple walkways in your plot, reduce by a quarter.
[1] Ammonium sulfate will lower soil pH.
[2] You can reduce nitrogen by 2 lbs. if using manure.