Article: Artificial neural network analysis of laboratory and in situ spectra for the estimation of macronutrients in soils of Lop Buri (Thailand).

Introduction

Soil has both dynamic and relatively static properties varying spatially (Bouma 1997). In particular, the topmost layers of agricultural soils are very delicate and dynamic in their behavior. Soil testing, since 1940s (SPAC 2000), has been a routine practice for appraising the quality and to determine fertiliser requirements. Reflectance spectrometry is an emerging and non-destructive tool for assessing soils and crops from their physical and biochemical make-up (Aparicio et al. 2000). Research has shown that careful examination of reflectance spectra could be a faster, cheaper, and more objective way to estimate some soil constituents. Depending on ...

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