1 . اکرم قادری، ف.، سلطانی، ا.، سلطانی، ا.، و میری، ع. ا. (1387) تأثیر پرایمینگ بر واکنش به جوانه‌زنی دما در پنبه. علوم کشاورزی و منابع طبیعی. 11(3): 51-44.
2 . حاتمی‌مقدم، ز. و زینلی، ا. (1387) بررسی کارایی تیمارهای پیش‌سرمادهی و خراش‌دهی شیمیایی و مکانیکی در شکستن رکود بذر گاوپنبه (Abutilon theophrasti ). تولید گیاهان زراعی. 1(1): 37-17.
3 . فروغی، ع. (1390). مطالعه اکوفیزیولوژیکی رقابت بین کنجد (Sesamum indicum L.) و توق (Xanthium strumarium Medic.). پایاننامه کارشناسی ارشد. دانشگاه علوم کشاورزی و منابع طبیعی گرگان. 98 ص.
4 . قادریفر، ف.، عالیمقام، س. م.، سنچولی، ا.، یوسفیداز، م. و میری، ع. (1391). مقایسه عملکرد و کیفیت الیاف پنبه در سیستم کاشت با فواصل ردیف خیلی کم و رایج. تولید گیاهان زراعی. 5(2): 91-75.
5 . مهدوی دامغانی، ع. و کامکار، ب. (1388). مروری بر رقابت علف‌های هرز و گیاهان زراعی. انتشارات جهاد دانشگاهی مشهد، 352 ص.
6 . Bailey WA, Askew SD, Dorai-Raj S and Wilcut JW (2003) Velvetleaf (Abutilon theophrasti) interference and seed production dynamics in cotton. Weed Science. 51: 94-101.
7 . Bastiaans L, Kropff MJ, Goudriaan J and Van Laar HH (2000) Design of weed management systems with a reduced reliance on herbicides poses new challenges and prerequisites for modelling crop-weed interactions. Field Crops Research. 67: 161-179.
8 . Boquet DJ (2005) Cotton in ultra-narrow row spacing: Plant density and nitrogen fertilizer rates. Agronomy. 97: 279–287.
9 . Cortes JA, Mendiola MA and Castejon M (2010) Competition of velvetleaf (Abutilon theophrasti) weed with cotton (Gossypium hirsutum L.). Economic damage threshold. Spanish Journal of Agriculture Research 8: 391-399.
10 . Cousens R (1985) A simple model relating yield loss to weed density. Annals of Applied Biology. 107: 239-252.
11 . Francisco J, Arriaga SAP, Jose FT and Dennis PD (2009) Cotton gas exchange response to standard and ultra-narrow row systems under conventional and no-tillage. Crop Science. 4: 42-51.
12 . Ghajari A and Akram Ghaderi F (2007) Influence of row spacing and population density on yield and yield components of three cotton cultivars in Gorgan. Journal of Agricultural Science. 4: 833-844.
13 . Horvath DP, Gulden R and Clay SA (2006) Microarray analysis of late season velvetleaf (Abutilon theophrasti) impact on corn. Weed Science. 54: 983–994.
14 . Horvath DP, Llewellyn D and Clay SA (2007) Heterologous Hybridization of Cotton Microarrays with Velvetleaf (Abutilon theophrasti) Reveals Physiological Responses Due to Corn Competition. Weed Science. 55: 546-557.
15 . Jost PH and Cothren JT (2001) Phenotypic alterations and crop maturity differences in ultra-narrow row and conventionally spaced cotton. Crop Science. 41: 1150-1159.
16 . Knezevic SZ, Evans SP and Mainz M (2003) Row spacing influences the critical timing for weed removal in soybean (Glycine max). Weed Technology. 17: 666-673.
17 . Larson JA, Gwathmey CO, Roberts RK and Hayes RM (2004) Effects of plant population density on net revenues from ultra-narrow-row cotton. Cotton Science. 8: 69-82.
18 . Larson JA, Gwathmey CO and Hayes RM (2005) Effects of defoliation timing and desiccation on net revenues from ultra-narrow-row cotton. Cotton Science. 9: 204-214.
19 . Limon-Ortega A, Mason SC and Martin AR (1998) Production practices improve grain sorghum and pearl millet competitiveness with weeds. Agronomy. 90: 227-232.
20 . Molin WT and Hugie JA (2010) Effects of population density and nitrogen rate in ultra narrow row cotton. Scholarly Research Exchange. Pp. 1-6.
21 . Molin WT, Hugie JA and Hirase K (2004) Prickly sida (Sida spinosa L.) and spurge (Euphorbia hyssopifolia L.) response to wide row and ultra narrow row cotton (Gossypium hirsutum L.) management systems. Weed Biology Management. 4: 222-229.
22 . Mulugeta D and Boerboom CM (2000) Critical time of weed removal in glyphosate-resistant Glycine max. Weed Science. 48: 35-42.
23 . Nichols SP, Snipes CE and Jones M (2004) Cotton Growth, Lint Yield, and Fiber Qualities Affected by Row Spacing and Cultivar. Cotton Science. 8: 1-12.
24 . Pettigrew WT (2001) Environmental effect on cotton fiber carbohydrate concentration and quality. Crop Science. 41: 1108-1113.
25 . Rajcan I and Swanton I (2001) Understanding light quality and whole plant. Field Crop Research. 71: 139-150.
26 . Reddy KN, Borke IC, Clif Boykin J and Williford JR (2009) Narrow row cotton production under irrigated and non-irrigated environment: plant population and lint yield. Cotton Science. 13: 48-55.
27 . Siebert JD and Stewart AM (2006) Influence of plant density on cotton response to mepiquat chloride application. Agronomy. 98: 1634-1639.
28 . Stephenson DO, Barber LT and Bourland FM (2011) Effect of twin-row planting pattern and plant density on cotton growth, yield, and fiber quality. Cotton Science. 15: 243-250.
29 . Thanisawanyangkora S, Sinoquet H, Jallas E and Cretenet M (1997) Changes in leaf orientation and canopy structure of cotton (Gossypium hirsutum L.) under different plant population densities. Natural Science. 31: 106-127.
30 . Vories ED and Glover RE (2006) Comparison of growth and yield components of conventional and ultra-narrow row cotton. Cotton Science. 10: 235-243.
31 . Willey RW (1990) Resource use in intercropping systems. Agricultural Water Management. 17: 215-231.
32 . Zhang BH, Lin F, Yao CB and Wang KB (2000) Recent progress in cotton biotechnology and genetic engineering in China. Current Science. 79(10): 247-263.
)