旱地机械化保护性耕作技术（续１）□张进韩战省（上接１９９６年第５期第３４面）目前，许多国家和地区都在大力研究和发展旱地机械化保护性耕作技术。该技术的诸多优越性已日益被人们认识和接受。３保护性耕作技术的基本原理保护性耕作技术抗旱增产的基本原理是：（１... Mechanized Conservation Tillage in Drylands (Revised 1) □ Zhang Jinhan War Province (Continued from page 34 of 1996). At present, many countries and regions are vigorously studying and developing mechanized conservation tillage techniques in drylands. Many advantages of this technology have been increasingly recognized and accepted by people. 3  conservation tillage technology, the basic principles of conservation tillage technology to increase the basic principles of drought resistance is: (1 ...