the effect of seed density and plant distance on the yield and growth components of radish (rhaphanus sativus cv. longipinatus) as second culture in paddy field.

to study the effect of seed density and plant distance on yield and growth parameters of radish, an experiment was conducted in research of station rice at office rasht in 2008-2009. this study was set in secondary culture after rice by factorial experiment with randomized complete block design with 3 replications. treatments consisted of factorial arrangement of three seed density levels (5, 10 and 15 kg/ha) and plant spacing (20 and 30 cm). measurements comprising of total production in hectare, weight of one shrub, weight of tuber, weight of foliage, shrub height, leaf number, length of leaf, length and diameter of tuber. results showed that seed density of 5 kg in hectare in plant distance of 20 cm with yield of 45.38 ton in hectare was most performance and recommendable for this region.