Altered Nitrogen Availability in Pea–Barley Sole- and Intercrops Changes Dominance of Two Nitrophilic Weed Species

Effective and sustainable weed management in agricultural fields is a prerequisite for increasing crop yield without negatively impacting the environment. The aim of this study was to explore how varying nitrogen (N) availability cropping arrangements pea (Pisum sativum) barley (Hordeum vulgare) grown as sole crops intercrops at different fertilization levels considering N sources (soil mineralization, fixation, fertilizer) affects response species with differential responsiveness. Crop biomass were sampled flowering maturity. total content 15N isotope signatures analyzed differentiate between estimate amount available weeds. highly N-responsive (Chenopodium album) accumulated more than reduced responsiveness (Galeopsis spp.). Fertilizer supply favored Chenopodium album, but not crops. Altered soil caused shift dominance nitrophilic towards species. This could affect long-term community composition thus have implications management.