Guar seed yield in function of row spacing and plant density

Guar responds to variations in row spacing and population density, however, to obtain the highest seed yield it is ne-cessary to determine the best combination of these factors according to environmental conditions and agronomic management. The aim of the study was to determine the seed yield potential of guar in response to row spacing and plant density at the center-south region of Chihuahua. The study was carried out in Delicias, Chihuahua, during the 2021 spring-summer season. Four distances between rows (30, 45, 60 and 75 cm) and four plant densities (30, 45, 60 and 75 plants m-2) were evaluated. An experimental design of randomized complete blocks with three replications was used, with a 4 x 4 factorial treatment arrangement. The seed yield and its yield components were determined. There was no interaction for distance between rows x population density; a significant statistical difference was only found for row spacing. The 30-cm row spacing exceeded in seed yield (2,750 kg ha-1) the other spacings (2,001 to 2,321 kg ha-1), in which no differences were found between them. The highest production in rows at 30 cm was associated to its higher leaf area index, and therefore, with its higher solar radiation interception.