Abstract
The effect of diFferent plant lepaoings on the yield of seed-cotton of four varietie% of upland !cotton, i.e.. B557, ALT59. Express and Reatina. way studied. Keeping interrow space (75 (stn.) constant it was observed. that AUti.9 pffrformed batter at 60 .cm plant to plant distance, whereas. Express did 40 at 15 cm and 30 cm, R &elms gave good results when mown at 15 cm interplant 6paoings.
INTRODUCTION
Cotton, the mos4 Important eamh crop of Pakistan, is continuously being tallied for its improvement xn yield and quality,. Consequently, many high yielding varieties have been evolved by the breeders which increased the produo• tire' gubltantially, But comparing with oth5r ootion.growing countries. Pakistan 'still lags behind as far as its per utak area production is concerned.. Probably, for a long time the potential of our cotton varieties could not be fully exploited, Mere genetic improvement of a crop does not work million its production technology including agronomic aspects. are properly taken care of. One of the most important agronomic practices of cotton growing to keep proper spacing rn °Lig the plants., Ample evidence on this aspect of cotton eultivation is avaii-able in the literature.. For example, Nayak (11154) observed that spacing of 8$ c111 Wirt, higher yield of seedoutton than 45 and 50 cm. Stephen and Morrill (1976) reporte:d significantly higher yield under 25 and 51 cm row spacing than 76 cm. El-liattab tt al,. (197) obtained increased seedeotton yield per unit area with increased hill spacing from 20 to 30 em and one plant per hill instead of 2-3 plants in case of 'Aah,mouni" cotton variety. Similarly. Rana and Shah 1-98l) and Khan Da a . (1481) also studied the effect of interplant epa
