LAUSR

Abstract Guar (Cyamopsis tetragonoloba L.) is an annually legume with high adaptability in arid and semi-arid regions has various applications in different industrials as well as in animal food. A field experiment was carried out as split-split plot arrangement in randomized complete block design with three replications to evaluate the influence of planting dates (April 30th and May 31st) and irrigation regimes [(two times of irrigation: after sowing and flowering (Ir1), three times of irrigation: after sowing, flowering and seed formation (Ir2), and four times of irrigation: after sowing, flowering, seed formation and prior to harvesting (Ir3)] on biochemical features (e.g. protein and fat contents, antioxidant activity, and amino acid constituents), phytochemical properties (e.g. total phenol and galactomannan contents), phonological traits (e.g. number of days to flowering, podding and harvesting), and yield components (e.g. seed yield, number of branch/plant, seed/plant, pod/plant, 100-seed weight) of three local landraces (Pishen, Grembite and Saravan) of guar plant. According to the ANOVA, some traits such as plant height, number of branches/plant, pod/plant, seed/plant, pod length, 100-seed weight, gum and protein contents, viscosity, and seed yield were significantly (P