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Paper Information

Journal:   APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY   March 2002 , Volume 69 , Number 2; Page(s) 171 To 188.
 
Paper: 

EFFECT OF ROW SPACING AND WEED FREE PERIOD ON YIELD AND YIELD COMPONENTS OF COTTON (GOSSYPIUM HIRSUTUM L.)

 
 
Author(s):  HADIZADEH M.H.*, NOUROUZ ZADEH S., RAHIMIAN H.
 
* Kashmar Agricultural Research Station
 
Abstract: 

An experimental field was conducted in split plot design with four replications at Kashmar (NE. of Iran) to investigate effects of row spacing on critical were consident as cotton (GossypiumhirsutumL . var. Varamin). There row spaces (60,75 and 100 cm)were main plots and seven treatments of weed free period included 0,3,6,9.12 and 15 weeks after cotton emergence in adition to a check treatment of throught season weeded plot were as supplots. Plant population of all plots was consistent and adjusted to 6.6 plant /m2.Results showed that all mesearud characters in except of cotton height had no effects by row spaces. Howerer the intluence of weed free periods were significant for branch numbers (monopodial and sympodial). plant height. ball numbers (open and closed) and 20 bools weight. According to exponential polynomial equation titted for yield (percent of weed free check plot) vs. weed free periods. the results indicatced that 51 days weeding for 60 and 75 em row space and 70 days weeding for 100 cm row space was necessary to adopt 95% yield of weed free check treatment. Yield (perecnt of weed free check) of 60 cm row space treatment was tending to increase and for 100 cm row space tending to decrease altough all of them were not significant.

 
Keyword(s): COTTON, WEEDS, COMPETITION, WEED FREE PERIOD, ROW SPACE
 
References: 
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