NORMATIVE YIELD OF SPRING WHEAT IN THE NOVOSIBIRSK REGION: DIGITAL MAPPING, COMPARISON WITH ACTUAL DATA

For the territory of the Novosibirsk region, a digital mapping of the normative crop yield of spring wheat was carried out using an abbreviated calculation formula (excluding coefficients for soil properties and intensive cultivation technologies). The comparison of the average values of the normative (YN) and actual yield (YA) of spring wheat (excluding varietal differences) by districts was carried out. Geospatial analysis showed that the values of YN was in the range from 12 to 19 c/ha and increase from the southwest to the northeast of the region. The actual yield varied in the range from 9,5 to 31,3 c/ha. The correlation coefficient between YN and YA was characterized by a moderate relationship strength (r=0,39). Lower (by 1,2–1,8 times) average values of YN in relation to YA were recorded in the following areas: Bolotninsky, Dovolensky, Kolyvansky, Kochenevsky, Kochkovsky, Krasnozersky, Kupinsky, Maslyaninsky, Novosibirsky, Ordynsky, Tatarsky, Cherepanovsky. It is assumed that the use of soil coefficients in the calculation YN of spring wheat will not allow the identified differences to be leveled, while they will be even more pronounced. Higher (by 1.4–1.8 times) average values of YN in relation to YA were observed in Karasuksky and Kyshtovsky districts. In these areas, the use of soil coefficients is likely to lead to an underestimation of the YN.