Segregation in and flowability of blended fertilizers

A. K. Jha, Hojae Yi, V. M. Puri

Research output: Contribution to conferencePaperpeer-review


Researchers have documented that size difference of particles in blended fertilizers is the most dominant physical property contributing towards segregation. Herein, segregation of two-size urea (coarse, 3350-4000 urn and fine, 1700-2000 urn) and flowability of fines (1700-2000 urn) were studied at two different equilibrium relative humidity conditions (50% ERH and 60% ERH). Percolation segregation was studied by mixing coarse and fine urea in equal proportion by weight using a power operated bench-top mixer. Mixed sample was placed into shear box of the PSSC-II very gently with spatula to avoid any segregation. Percolation segregation was quantified using Primary Segregation Shear Cell (PSSC-II). Based on experimental results, the segregated mass of fines, normalized segregation rate (NSR), and mean segregation rate of fines for binary urea mixtures were higher at equilibrium relative humidity of 60% vs. 50%. Additionally, flowability of urea was evaluated using the Cubical Triaxial Tester (CTT). The angle of internal friction and cohesion values at two different relative humidity conditions were not significantly different (P>0.05).

Original languageEnglish (US)
StatePublished - 2006
Event2006 ASABE Annual International Meeting - Portland, OR, United States
Duration: Jul 9 2006Jul 12 2006


Other2006 ASABE Annual International Meeting
Country/TerritoryUnited States
CityPortland, OR

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)


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