00737naa#a2200205#i#450# EN\\bibl\110647 20251222014326.1 2587-6740 20250815b2025####ek#y0engy0150####ca RU Development of a method for assessing the state of land fertility based on modeling the productivity of agricultural crops in natural zones of the Altai region Journal article Moscow Electronic science 2025 4 с. Journal article local Плодородие. 631.452 Pochyomin Nikita Mihaylovich Morkovkin Gennady Gennad'evich Shapovalov Dmitry Anatol'evich Maximova Nina Borisovna mshj.ru