The arrowroot plant is native to the tropics of South America. It has a long history of cultivation by native peoples, who developed an extensive treatment process for extracting the usable powder from the roots. The roots are washed, scraped, beaten, soaked, pulped, and finally forced through a sieve.
A 100 pound bag of 16-4-8 contains 16 pounds of nitrogen, 4 pounds of phosphorus and 8 pounds of potassium. The rest if filler and minor elements. Even though it may cost more, a fertilizer containing slow release nitrogen is more efficient and cost effective in our sandy soils.ounding this number to six, you would apply six pounds of 16-4-8 fertilizer per 1000 square feet of lawn area. Using 12-4-8 fertilizer, you would apply eight pounds per 1000 square feet.
Diammonium phosphate is a widely used phosphorus-based fertilizer. Rich in nutrients, it's been available since the 1960s and is created by combining sulfur, ammonia and phosphate rock, which are heated or treated with acid.mounts vary depending on what you're growing. After using DAP fertilizer, the soil will temporarily have an alkaline pH of 8.5, so test the soil using a store-bought kit before planting to ensure it's returned to the pH level that's right your crops. Store DAP fertilizer in a cool, dry area away from water and light.