(a)[ regulating the production and curing of virginia tobacco having regard to the following factors, namely:-- [Substituted by Act 57 of 1985, Section 3 (w.e.f. 1.12.1985). ](i)the demand for virginia tobacco in India and abroad;(ii)the suitability of land for growing virginia tobacco;(iii)the differences in soil characteristics and agro-climatic factors in different regions of the country where virginia tobacco is grown and the effect thereof on the quality and quantity of virginia tobacco produced in those regions;(iv)the marketability of different types of virginia tobacco;(v)the need for rotation of crops; and(vi)the nature of the holdings of the growers of virginia tobacco whether owned or leased;]