ISSN:
1573-0867
Keywords:
Commercial fertilizer
;
hierarchical sampling
;
investigational allowances
;
legal allowances
;
sampling
;
tolerances
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract The process of establishing investigational allowances for fertilizer materials is reviewed. All sources of variation incurred in taking, preparing and analyzing an official sample of fertilizer are considered. The importance of both theoretical and practical considerations is discussed. Use of the techniques described is illustrated using a set of data involving five grades of commercial fertilizer. Sampling was by a hierarchical scheme. Estimates of variance components from these data were used in the estimation of the investigational allowances. Economic losses to the State of North Carolina, the farmers, and the manufacturer were estimated using various assumed prices and legal allowance establishment procedures. Setting the investigational allowances at 2.33 standard errors is confirmed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01064180
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