Abstract. This article is based on the data obtained from field experiments conducted in order to determine the abiotic and biotic factors resistance and yield elements of barley and triticale varieties planted in the field of spectral varieties of Sirdarya region. In the experiment conducted in field conditions, when the plants were harvested in the calculation area and biological yield was determined, triticale was 88.3 ts/ha, in the" Boyovut "variety - 83.1 ts/ha, in the" Tuyatish "variety - 67.6 ts/ha, in the" yielding "variety - 67.6 ts/ha, in the" Saykhun "variety - 69.0 ts/ha and in the" Sirdarya " variety - 65.8 ts / ha. It was observed that the indicators of resistance to external influences were high in barley varieties, and productivity elements in triticale varieties were higher in barley varieties due to the biological capabilities of the plant.