& JARAD, Tahir. STUDY THE EFFECT OF FRONT SPEED AND WORKING WIDTH ON SOME PERFORMANCE INDICATORS, POWER REQUIREMENT AND ECONOMIC COSTS FOR DIFFERENT SIZES OF AGRICULTURAL TRACTORS. IRAQI JOURNAL OF AGRICULTURAL SCIENCES, [S. l.], v. 48, n. 6 B, 2017. DOI: 10.36103/ijas.v48i6 B.282. Disponível em: https://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/282. Acesso em: 3 apr. 2025.