Making Fertilizer Comparisons Based Upon Price
Source: Ohio State University
Careful selection and comparison of fertilizer materials is becoming more important with increasing prices and the number of materials available, according to David Henry and Robert Mullen, Ohio State University. The most crucial step in making a fertilizer comparison is converting the prices of different materials to equal units such as price per pound of nitrogen, phosphorus or potassium. In order to make these conversions, there are a few pieces of information about each product that are needed.
- Cost per unit weight (for solids) or volume (for liquids)
- Material nutrient analysis (N-P-K)
- Density or specific gravity (for liquids)
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