01140nam a2200217Ia 4500 CTU_228549 210402s9999 xx 000 0 und d 632.954 A832 Asian-Pacific Weed Science Society Proceedings of the twelfth Asian-Pacific weed science society conference : Seoul republic of Korea August 21 - 26, 1989 Asian-Pacific Weed Science Society Seoul Asian-Pacific Weed Science Society 1989 The prevention and management of weeds has been a continuous problem throughout the history of food production and native ecosystem protection in the Asian-Pacific region. Despite improvements in the approaches used, weeds still reduce productivity and profitability by unacceptable amounts, and upset the balance of our natural ecosystems. The Asian-Pacific region has considerable strengths in many aspects of weed science technology and training. Cỏ dại,Weeds Kiểm soát,Control dqhieu Trung tâm Học liệu Trường Đại học Cần Thơ