Amaranthus hybridus 1 Arachis hypogaea 1 Arachis hypogea 1 Biofuel production 1 Biofuels 1 Brassica carinata 1 Cotton 1 Cotton (Gossypium hirsutum L.) 1 Cropping systems 1 Crops 1 Cultivation 1 Gossypium hirsutum 1 Lamium amplexicaule 1 Oilseeds 1 Research objectives 1 Rotational levels 1 Senna obtusifolia Stellaria media 1 Summer fallow 1 Trixis 1 United States 1 Weed management 1 crop rotation 1 growth response 1 integrated approach 1 integrated weed management 1 population dynamics 1 seasonal variation 1 summer weeds 1 weed 1