“WILLINGNESS TO PAY FOR ORGANIC TOMATO AND BELL PEPPER IN KANO STATE, NIGERIA: A HECKMAN TWO-STEP ANALYSIS”. Impact International Journals and Publications, vol. 2, no. ISSUE 3, July 2026, pp. 247-56, https://impactinternationaljournals.com/publications/index.php/ojs/article/view/600.