Development of Near Infrared Spectral Models for Characterizing the Amy Soil Series. Issue 6 (4th August 2015)

• Record Type: Journal Article
• Authors: Bhandari, B.; Ficklin, R.L.
• Is Part Of: Soil horizons. Volume 55:Issue 6(2014)
• Page Start: 1
• Page End: 9
• Publication Date: 2015-08-04
• Subjects: Soil science -- Periodicals; Soil surveys -- Periodicals; Soil science; Soil surveys; Periodicals; Electronic journals; 631.4
• DOI: 10.2136/sh13-11-0027
• Languages: English
• ISSNs: 2163-2812

Abstract

Abstract : Physical and chemical properties of soils are routinely analyzed to assess site parameters and optimize ecological resources for precision farming, environmental monitoring, and soil survey and classification. Since existing standard laboratory methods are resource intensive, expensive, and time consuming, a convenient, rapid, economical, and ecologically viable technology is needed. The goal of this research was to evaluate the feasibility of using near infrared reflectance spectroscopy (NIRS) as an alternative analytical technique using 200 soil samples collected at depth increments of 0 to 15 and 15 to 30 cm in soils mapped as Amy silt loam in southeastern Arkansas. At the depth of 0 to 15 cm, NIRS successfully predicted several soil parameters, including sand ( R 2 = 0.85), silt ( R 2 = 0.80), clay ( R 2 = 0.91), N ( R 2 = 0.75), C ( R 2 = 0.77), C/N ratio ( R 2 = 0.78), P ( R 2 = 0.80), K ( R 2 = 0.83), Ca ( R 2 = 0.92), Mg ( R 2 = 0.92), Mn ( R 2 = 0.93), and B ( R 2 = 0.87). Similarly, at the depth of 15 to 30 cm, sand ( R 2 = 0.86), silt ( R 2 = 0.89), clay ( R 2 = 0.96), N ( R 2 = 0.79), C ( R 2 = 0.82), C/N ratio ( R 2 = 0.76), P ( R 2 = 0.88), K ( R 2 = 0.93), Ca ( R 2 = 0.89), Mg ( R 2 = 0.89), Na ( R 2 = 0.87), Mn ( R 2 = 0.96), Zn ( R 2 = 0.95), and B ( R 2 = 0.95) were well predicted. These results demonstrate that NIRS is a nondestructive, fast, accurate, reliable, cost effective, and ecologically viable analytical technique to augment standard laboratory methods for routine analyses of soil properties.