The study was carried out on a private farm in the Algerian desert at El Oued area to examine the cultivation density of two quinoa cultivars, yellow and black, with dimensions (D1, D2, D3, and D4) of 20 cm, 30 cm, 60 cm, and 40 cm, respectively. A split-plot design was given for both cultivars, with three iterations for each dimension. Many criteria were examined, including morphological parameters (panicle length, stem length, stem circumference, and leaf area), biochemical measures (chlorophyll (a) and (b), and sugars), and production properties (panicle weight, panicle seed weight, 1000 seed weight, and seed yield).The findings demonstrated that the quinoa plant responded in morphological and productive criteria to high densities of D1 and medium densities of D2 and D3 when cultivated at various densities. ANOVA analysis indicated significant differences in parameters between the four distances and the two studied cultivars, including stem length (SL), leaf area (LA), aerial dry weight (ADW), total panicle weight TPW, and chlorophyll (b). The yellow cultivar gave better results than the black one, and both cultivars had better results at high densities than other crops (wheat, barley, and maize). However, at densities greater than D4, the results were the opposite.

quinoa, yellow, black, cultivation density, morphological, productivity