Bulk blends are two or more fertilizers mechanically blended. Bulk blends are prepared to individual order of every customer depending on the kind of soil (on the basis of soil analysis) and individual characteristocs of the cultivated crop. From the economic point of view bulk blends are the most effective mineral fertilizers as they introduce as much nitrogen, and/or phosphorus, and/or potassium to the soil as it is necessary to receive the best harvest of the given crop on the given field.

For example, while cultivating oats it is possible to reduce the amount of phosphorus fertilizers or not to use them at all as the root system of this crop is able to “extract” phosphorus from its hardly accessible compounds in soil.

The following NPK ratios are common for bulk blends:

• 32:0:5
• 27:0:13
• 32:5:0
• 24:6:12
• 24:0:18
• 27:6:6
• 23:0:23
• 13:13:20+ 2 MgO
• 9:18:18+ 2 MgO
• 15:12:19+ 3 MgO
• 15:7:15+ 3 MgO