Classical statistical and geostatistical analysis of soil nitrate-N spatial variability

G. W. Hergert, R. B. Ferguson, C. A. Shapiro, E. J. Penas, F. B. Anderson

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Farmer fields from major corn production areas across Nebrasaka were sampled. Classical statistical analysis showed 12 to 20 cores per hectare were required to provide estimates of field nitrate content that were within ±20% of the mean at confidence levels of 80% to 90%. Geostatistical analysis indicated the average range for sample independence was 90 m. For 10 to 12 ha fields a lag spacing of 75 to 90 m would provide reasonable field average accuracy and would provide a dense enough grid to develop Kriged maps for variable rate N application. -from Authors

Original languageEnglish (US)
Pages (from-to)175-186
Number of pages12
JournalUnknown Journal
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences


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