a field study was conducted to evaluate the agronomic response of eight isolines of cv.
clark on a clay loam soil (at karaj-iran, 35048´) to four plant population densities of 11.3,
18.5, 68.5, and 103.4 plants per square metre. significant yield increase was obtained as a
result of higher plant density. differences among the cv. clark isolines were significant
(p