Abstract

Abstract Guar (Cyamopsis tetragonoloba (L.) Taub.) is a legume of unusual industrial importance due to increased utilization of Guar gum, ‘Guran,’ in numerous modern manufacturing and food processes. Guar has high tolerance of drought and inhibitory soil characteristics and has been utilized for many centuries within the subhumid regions of the Indo‐Pakistan subcontinent. Nodulation, nitrogen fixation, and yields of high protein seed with desirable Guran content are improved by favorable soil fertility. Plant growth, seed yields, and nodulation are influenced by plant population density. Top Growth quadratically increased with plant population densities of 10, 25, and 50 plants per meter2 for P and P+K treatments. Highest seed yield and nodule development resulted for all soil fertility treatments with 25 plant per meter2. Ontogenetic response from anthesis to full seed maturity resulted with increased nodulation significantly correlated (r = 0.67) with top growth. However, nitrogenase activity levels pla...

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