Discussion
State whether the following is true or false.
Granulation is preferred to simple blending of powders for a multi-nutrient fertiliser.
Answer: C
Correct answer: True
A blend of powders segregates during handling, since the components differ in particle size and density, so the analysis at the field is not the analysis on the bag. Granulating the nutrients together puts all of them into every granule, which cannot separate; the granules also flow better, dust less and resist caking. The cost is the granulation plant, which blending avoids.
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