1 Anonymous. Principles of Weed Management. International Rice Research Institute, Philippines. http://www. knowledgebank.irri. org / IPM / weedMgmt / default.htm, 2003.2 Johnson D E. Weed management in small holder rice production in the tropics. Chatham, Kent, UK: Natural Resources Institute, University of Greenwich, 2002.3 Baloch M S, Awan I U, Jatoi S A, Hussain I, Khan B U. Evaluation of seeding densities in broadcast wet seeded rice. J Pure & Appl Sci, 2000, 19 (1): 63-65. 4 Hayat K, Awan I U, Hassan G. Impact of seeding dates and varieties on weed infestation, yield and yield components of rice (Oryza sativa L.) under direct wet seeded culture. Pak J Weed Sci Res, 2003, 9 (1/2): 59-65.5 Subhas C, Jitendra P. Effect of rice (Oryza sativa) culture, nitrogen and weed control on nitrogen competition between scented rice and weeds. Indian J Agron, 2001, 46 (1): 68-74. 6 Mandal B, De P, De G C. Efficiency of herbal leaves on weed management of transplanted kharif rice. J Interacademicia, 2002, 6 (1): 109-112. 7 Ming H, Ye Y F, Chen Z Y, Wu W X, Du Y F. Effects of butachlor on microbial enzyme activities in paddy soil. J Environ Sci, 2002, 14 (3): 413-417.8 Bhargavi K, Reddy T Y. Growth pattern of weeds and semi-dry rice (Oryza sativa) under various weed-management practices. Indian J Agron, 1994, 39 (1): 113-116. 9 Chiba K, Kawashima C. Studies on the ecology and control of Scirpus planiculmis Fr. Schm, a paddy weed in Hachirogata reclaimed land. Weed Res, 1994, 39 (3): 153-159.10 Rana S S, Angiras N N. Influence of integrated weed management on physiological performance of broadcast sown puddled rice (Oryza sativa L.). Himachal J Agric Res, 1999, 25 (1/2): 1-9.11 Lockhart J A R, Wiseman A J L. Introduction to Crop Husbandry. Oxford, UK: Wheaton & Co. Ltd., Pergamon Press, 1988: 70-180.12 Chaudhry F M. Kharif cereal crops. In: Bashir E, Bantel R. Crop Production. Islamabad, Pakistan: National Book Foundation, 1994: 252-260.13 Steel R G D, Torrie J H. Principles and Procedures of Statistics. New York: McGraw Hill Book Co Inc, 1980.14 Okafor L T, De Datta S K. Competition between weeds and upland rice in monsoon Asia. Weed Sci Bull, 1974, 1: 39-45.15 Lee S G, Yang E S, Lee J C, Chung C T, Shin C W, Woo I S, Pyon J Y. Emergence of paddy perennial weeds and their herbicidal response to sulfonylurea herbicides under different planting depths. Korean J Weed Sci, 2000, 20 (1): 23-31.16 Tuong T P, Pablico P P, Yamaguchi M, Confesor R, Moody K. Increasing water productivity and weed suppression of wet seeded rice: Effect of water management and rice genotypes. Exp Agric Cambridge, 2000, 36 (1): 71-89.17 Im I B, Guh J O, Lee S Y. Weed occurrence and competitive characteristics under different cultivation types of rice (Oryza sativa L.). 2. Competition for community space of rice and weeds. Korean J Weed Sci, 1993, 13 (1): 36-43. 18 Khondaker N A, Sato K. Absolute density, dry matter weight and intensity of weed infestation in transplanted rice field in Bangladesh. Jpn J Trop Agric, 1996, 40 (3): 106-112.19 Awan I U, Hayat K, Hassan G, Kazmi M, Hussain N. Effect of seeding rates and herbicides on weed dynamics and paddy yield of direct wet seeded rice. Pak J Weed Sci Res, 2004, 10 (3/4): 11.20 Sultana R. Competitive ability of wet-seeded boro rice against Echinochloa crusgalli and Echinochloa colonum. MS Thesis. Mymensingh, Bangladesh: BAU, 2000. 21 Mamun A A, Ahmad S, Sarker A U. Critical period of crop weed competition in direct-seeded Aus rice. Bangladesh J Agric Sci, 1986, 13: 61-66.22 Hach C V, Chin D V, Nhiem N T, Nam N T, Mortimer M, Heong K L. Effect of tillage practices on weed infestations and soil seed banks in wet-seeded rice. Abstracts of the Ⅲ International Weed Science Congress, Foz do Iguassu, Brazil. Corvallis, Oregon, USA: International Weed Science Society, Oregon State University, 2000: 51. 23 Haque M E, Karim S M R, Samsuddoha A T M. Comparative growth attributes of Echinochloa colona (L.) Link. grown in rice field. Bangladesh J Bot, 1999: 28 (2): 159-167. 24 Prasad S M, Mishra S S, Singh S J. Effect of establishment methods, fertility levels and weed-management practices on rice (Oryza sativa). Indian J Agron, 2001, 46 (2): 216-221.25 Hoon H, Kim Y K, Hoon J, Kim Y K. Analysis of physiological and ecological characteristics of rice cultivated with direct seeding on dry paddy field. Japan J Crop Sci, 1997, 66 (3): 442-448. 26 Gogoi A K, Kalita H. Integrated weed control in direct seeded upland rice. Indian J Agron, 1990, 35 (4): 433-434.27 Jr Escabarte R S, Ando H, Kakuda K. Comparison of growth and 15-nitrogen recovery between direct seeded flooded and transplanted rice at early growth stage under conventional and delayed planting. Soil Sci Plant Nutr, 1999, 45 (1): 131-142.28 Heu H, Yong K K. Analysis of physiological and ecological characters of rice cultivated with direct seeded cultivation on dry paddy field. In: Ishii R, Horie T. Crop Research in Asia: achievement and perspective. Proceedings of the 2nd Asian Crop Science Conference. Fukui: Crop Science Society of Japan, 1996: 220-223. 29 Peng S, Garcia F V, Gines H C, Laza R C, Samson M I, Sanico A L, Visperas R M, Cassman K G. Nitrogen use efficiency of irrigated tropical rice established by broadcast wet seeding and transplanting. Fert Res, 1996, 45 (2): 123-134. |