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Variation in the natural enrichment of 15 N in apple trees and soils
Author(s) -
Atkinson David,
Johnson Martin G.,
Crisp Carol M.,
Maude Gillian,
Mercer E. Reuben
Publication year - 1987
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740380105
Subject(s) - soil water , orchard , variation (astronomy) , growing season , environmental science , botany , horticulture , biology , agronomy , soil science , physics , astrophysics
Leaf, wood and soil materials taken from an established apple orchard contained 15 N in excess of atmospheric levels. Enrichments were highest (0.380 atom%) in surface soil and lowest in leaves (0.376 atom%). Enrichments varied over the course of a single season, being generally higher in late summer (August) and autumn (November) than in June and July. The patterns of variation in enrichment suggested that assessments of tree to tree variation for leaves should be made; but time variation for surface soil would be more important.