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How variable is nitrogen in production agriculture fields?
Author(s) -
Xiong Xiong,
Wilson Eric,
Fernández Fabián G.
Publication year - 2016
Publication title -
crops and soils
Language(s) - English
Resource type - Journals
eISSN - 2325-3606
pISSN - 0162-5098
DOI - 10.2134/cs2016.49.0311
Subject(s) - nitrogen , agriculture , environmental science , production (economics) , certification , variable (mathematics) , sample (material) , soil science , soil test , agricultural productivity , soil water , agronomy , mathematics , agricultural engineering , geography , engineering , economics , chemistry , biology , archaeology , management , organic chemistry , macroeconomics , mathematical analysis , chromatography
Researchers set out to determine (i) the effect of drained and undrained conditions and previous crop on soil N concentrations and variability, (ii) the number of soil cores needed in a composite sample to correctly represent soil N fractions, and (iii) the feasibility of representing soil N in deeper layers of the soil with shallower samples. Earn 1 CEU in Soil & Water Management by reading this article and taking the quiz at www.certifiedcropadviser.org/certifications/self‐study/772 .