TY JOUR TI Improving the methodology for assessing the investment attractiveness of the agricultural sector in the Krasnodar region KW investment attractiveness KW agro-industrial complex KW Krasnodar territory KW 4D methodology KW economic added value KW factor and value analysis KW investment policy JO INTERNATIONAL AGRICULTURAL JOURNAL AU Khalyapin, A.A. PY 2026 IS 0 PB Electronic science