1986 IFDC Manual for Determining Physical Properties of Fertilizer
The International Fertilizer Development Center (IFDC) has prepared a manual outlining methods for the determination of physical properties of fertilizer, which includes procedures used by IFDC to evaluate the physical quality of commercial and experimental fertilizer products and raw materials. Many of the procedures included in the manual were adopted from the Tennessee Valley Authority (TVA)/National Fertilizer Development Center (NFDC)and other organizations involved in the meassurement of physical properties. IFDC does not endorse these methods as being standards.
The physical properties of fertilizer that are included in the manual are critical relative humidity, moisture absorption-penetration characteristics, flowability, chemical compatibility in blends, caking tendency, size analysis, physical compatibility in blends, angle of repose, bulk density, apparent density, true density of solids and liquids, viscosity, granule crushing strength, abrasion resistance, impact resistance, handling strength, sphericity, conditioner adherence, dustiness, surface area, disintegration rate, and porosity.
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