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This article in SSSAJ

  1. Vol. 44 No. 2, p. 438-440
     
    Received: Aug 17, 1979
    Published: Mar, 1980


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doi:10.2136/sssaj1980.03615995004400020050x

Particle Size Effects on Stockpiling and Spreading Agricultural Limestone1

  1. M. M. Alley,
  2. G. D. McCart,
  3. D. D. Wolf and
  4. E. S. Smith2

Abstract

Abstract

Stockpiling of agricultural limestone is a necessity in many agricultural regions due to transportation and production limitations. Particle size influence on stockpiling and spreading ground limestone must be quantified in order to produce a material that is effective in neutralizing soil acidity and can be uniformly spread after weather-exposed storage. Effects of particle size on bulk density, percent moisture, and spread pattern uniformity by a commercial twin-spinner bulk spreader were measured. Calcitic and dolomitic limestones with >60% passing a 100-mesh (150 µm) sieve bridged in the spreader body and resulted in uneven flow to the spreader spinners. Handling problems were not encountered with materials having <55% passing a 100-mesh sieve. Ground limestones with particle size distributions of 85 to 88, 48 to 61, and 39 to 56% passing 20- (850 µm), 60- (250 µm), and 100-mesh sieves, respectively, were evenly spread after outdoor storage. Bulk densities ranged from 1.34 to 1.53 g/cm3 while moisture contents varied from 0.7 to 6.0%.

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