Journal article

Die gebruik vannabyinfra-rooiterugkaatsende spektroskopie vir die bepaling van stikstof in plante

RJ Eckard, N Miles, NM Tainton

Journal of the Grassland Society of Southern Africa | Published : 1988

Abstract

A Near Infra-Red Reflectance Spectrophotometer was calibrated to analyse Italian ryegrass for protein nitrogen (N). Rye­grass samples having a wide range in N content were analysed by standard “wet” chemistry techniques and the resulting data used to calibrate the Near Infra-Red Spectrophotometer for ryegrass N analysis. A correlation (r) of 0,99 and standard error of calibration (SEC) of 0,209 resulted from the initial regression analysis between the Near Infra-Red Spectroscopy (NIRS) esti­mated and “wet” chemistry data. In order to further evaluate the accuracy of the NIRS calibration a separate set of ryegrass samples were analysed for N content, by both the “wet” chemistry and NIRS metho..

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