摘要:

Traditional labour-intensive methods of weed control which are normally associated with shifting cultivation are evaluated and compared with the use of herbicides and improved cultural practices. Problems occurring in shifting cultivation, such as weed seed dormancy, erosion and changing weed population; and methods of reducing the weed problem are discussed.

ISSN:0030-7793    

DOI:10.1080/09670877509411394

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411395

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411396

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411397

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411398

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411399

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411400

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

ISSN:0030-7793    

DOI:10.1080/09670877509411401

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Use of less liquid to apply pesticide sprays requires more detailed consideration of droplet size. This paper describes various methods of sampling spray droplets in the field, their measurement under a microscope and calculation of the number and volume median diameter of the sampled droplets.

ISSN:0030-7793    

DOI:10.1080/09670877509411402

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

PHYTOPHTHORA DISEASE OF COCOA. Edited by P. H. Gregory. Longman Group Limited, London 1974. ISBN 0 582 46658 X Pp.xii + 348. Price £17.50.

ISSN:0030-7793    

DOI:10.1080/09670877509411403

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor