Agronomic evaluation of the effectiveness of fertilizers in potato cultivation in the Altai territory

The article presents the results of plot experiments on growing potatoes of the Rosaravariety, laid down in the farm "Zinoviev E.N." of the Pervomaisky district of the Altai territoryin 2021. The purpose of the study was to substantiate the types and methods of applying granular and liquid fertilizers with microelements, as well as the formation of zonal technicaland technological complexes of machines that provide the best technical and economicindicators in operation. The best results were obtained in variant No. 4 of fertilization whenusing NPK "14-14-23" with a norm of 400 kg /ha, ammonium nitrate N34,4 with a norm of100 kg/ha and leaf fertilizing in 4 growing seasons, applied together with plant protectionproducts: 5-15 cm seedlings according to the scheme "18-18-18" (2 kg/ha); at the stage ofthe tops of 15-30 cm "18-18-18" (2 kg / ha), during budding "13-40-13" (2 kg / ha) and 3-4weeks before harvesting "6-14-35" (2 kg / ha). The maximum biological yield of 283 c/ha wasobtained in the variants of experiment No. 4 and No. 2 with the use of leaf fertilizing, thehighest combine yield of 245 c/ha was achieved in the division experiment No. 4. The use ofleaf fertilizing resulted in a significant and statistically significant increase in the mass ofpotatoes in the bush between variants 2 and 1 by 17.9%, and between variants No. 4 andNo. 3 by 17.2%. In all variants of the experiments, the proportion of substandard potatoes byweight did not exceed the requirements of the standard (10.0%), and the best results, both inquantity and in weight of potatoes, were obtained in variants with the use of top dressing