The Journal of Economic Literature codes classification system (JEL) published by the American Association (AEA) is de facto standard for research literature in economics. JEL used to classify articles, dissertations, books, book reviews, and working papers EconLit, a database maintained AEA. Over time, it has evolved extended with over 850 subclasses. This paper reviews history development sys...

In this research, which including two cytoplasmic male sterile female (CMS) lines and six recessives branching tester parent (RfRf), 12 hybrids (F 1 ) were obtained by crossing the in Plant Breeding Greenhouse of Field Crops Department 2018-19 winter period. trial was carried out 2019 as four replications. height (cm), head diameter 100 seed weight (g), yield (kg ha -1 ), oil content (%) invest...

In this article, a new type of ruled surfaces in a Lorentz 3-space R31 is obtained by a strictly connected time-like oriented line moving with Frenet s frame along a space-like curve. These surfaces are classified into time-like and space-like surfaces. The wellknown theorems due to Bonnet and Chasles in the 3-dimensional Euclidean space are proved for a time-like ruled surface. 2005 Published ...