The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 723
... methods were used . The first efforts to turn away from simple hand methods and mechanize the arduous task of weed control began in 17th - century En- gland . Since then there has been continuous improvement of agricultural tools used ...
... methods were used . The first efforts to turn away from simple hand methods and mechanize the arduous task of weed control began in 17th - century En- gland . Since then there has been continuous improvement of agricultural tools used ...
Page 725
... methods , land that has not been cropped for years may be returned to profitable use . Pre - emergence herbicides are applied after a crop has been planted but before the plants have emerged . Exist- ing weeds can be treated with these ...
... methods , land that has not been cropped for years may be returned to profitable use . Pre - emergence herbicides are applied after a crop has been planted but before the plants have emerged . Exist- ing weeds can be treated with these ...
Page 726
... methods for residue determination are developed . Commercial development . When this preliminary in- formation is gathered and analyzed , the new chemical is ready for experimental use in the field . Samples from the pilot plant are ...
... methods for residue determination are developed . Commercial development . When this preliminary in- formation is gathered and analyzed , the new chemical is ready for experimental use in the field . Samples from the pilot plant are ...
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6th century animal architecture artists Asuka period became bronze Bronze Age Buddhist buildings built Byzantine carved cell centimetres central centre century BC China Chinese Christian church Classical colour court courtesy culture Decorative arts dynasty early east eastern emperor example feet Figure French Greek hall Han dynasty Heian period Hōryū-ji important infection influence islands Italy Japan Japanese Kamakura period known Korean Kyōto late later ment metres mosaics motifs Muromachi period Museum Nara Nara period National northern ornament pagoda painters painting palace patterns percent period phage plant political population portraits pottery produced region relief river Roman Rome scenes scroll sculpture Shōsō-in South Vietnam southern stone style Sung surviving T'ang technique temple tion tombs tradition ture Unified Silla Uzbek variation varves vase vegetables Venezuela Venus Vermont vibration Vietnam Vietnamese viral virus viruses Vistula wall ware Western Yüan