Soil chemistry determinations using neutron-gamma analysis

Authors: Kavetskiy, Aleksandr; Yakubova, Galina; Prior, Stephen - Steve; Torbert, Henry - Allen; GAUTAM, SIDHARTH - Auburn University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 2/6/2024
Publication Date: 9/23/2024
Citation: Kavetskiy, A.G., Yakubova, G.N., Prior, S.A., Torbert III, H.A., Gautam, S. 2024. Soil chemistry determinations using neutron-gamma analysis [abstract]. International Soil and Tillage Research Organization (ISTRO), 23-27 September 2024, Virginia Beach, VA.

Interpretive Summary:

Technical Abstract: with a required field measurement time of no more than 1 h. This method is based on measuring the inelastic neutron gamma spectra in the tagged neutron mode and the subsequent deconvolution of this spectra based on reference spectra. The deconvolution procedure yields the soil component content in average weight percent for the upper soil layer (~20-30 cm). A mobile field measurement system was developed and constructed. This system included a neutron generator with a built-in alpha detector, LaBr gamma detectors, control electronics, an autonomous power system, and a control computer; GPS was also included for determining geographical positions. Algorithm and computer code were developed for spectra deconvolution and determining contents of each primary component. This presentation will discuss TNM, construction of the mobile field cart, and determination of primary soil chemical components for different agricultural fields in Alabama, USA. Possible correlations between soil component contents determined by TNM and soil texture will also be discussed.