Betalains in Amaranthus tricolor leaf were identified by means of reversed phase high-performance liquid chromatography (HPLC) and Liquid chromatography-Mass spectrometry (LC-MS). In addition to the known compound red-violet amaranthin, two yellow pigments were detected in Amaranthus tricolor. A novel betaxanthin, methyl derivative of arginine betaxanthin was identified on the basis of UV-Vis s...

A two year field experiment was carried out to evaluate the effects of municipal waste compost (C), composted cattle manure (M), and nitrogen (N) on growth and composition of weeds in a corn field in Shiraz using a split-split plot design with 3 replicates. Visual inspection of the plots showed that the manure treatments neither introduced new weed species nor increased weed density more than t...