Complete versus Incomplete Fertilizer

A fertilizer is said to be a complete or mixed fertilizer when it contains nitrogen, phosphorus and potassium (the primary nutrients). Examples of commonly used complete fertilizers are 6-12-12, 10-10-10, 15-15-15 and 20-10-10. An incomplete fertilizer will be missing one or more of the major components. Examples of incomplete fertilizers are: 34-0-0 (ammonium nitrate), 46-0-0 (urea), 18-46-0 (diammonium phosphate), 0-46-0 (triple super phosphate) and 0-0-60 (muriate of potash).

Incomplete fertilizers are blended to make complete fertilizers. As an example, if 100 pounds of 46-0-0 (urea) were combined with 100 pounds of 0-46-0 (concentrated super phosphate) and 100 pounds of 0-0-60 (muriate of potash), a fertilizer grade of 15-15-20 would result. When these quantities are combined, each quantity is diluted by the other two materials by one-third, provided each fertilizer material contributed equal weight to the blend.

The fertilizer ratio indicates the proportion of N, P2O5 and K2O containec the fertilizer. The specific fertilizer ratio you will need depends on the soil nutrien level. For example, a 1-1-1 ratio (10-10-10 or 15-15-15) is widely used at planting time when both phosphorus and potassium are in short supply (soil tests low medium). When soils test high or very high in phosphorus and potassium, ratio (34-0-0 or 46-0-0) may be a more appropriate choice for use at or near planting.

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Responses

  • willis
    What are incomplete ferti;izers?
    2 years ago
  • hilda
    What is an analysis of an incomplete fertilizer?
    2 years ago
  • Jaska
    What is the difference between complete and incomplete fertilizer?
    1 year ago
  • nicole roberts
    What is lncomplete fertilizer?
    1 year ago
  • Adamo
    What is incomplete fertilizer with examples?
    8 months ago
  • cora
    What are the examples of an incomplete fertilizers?
    8 months ago
  • louis
    What is incomplete fertilizer and give their examples?
    8 months ago
  • myla
    What is a "complete fertilizer"?
    5 months ago
  • charli alexander
    What is the difference between complete and incomplete fertlizers?
    4 months ago

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