Specific and general effectiveness ofRhizobium trifolii populations from different agricultural locations L. R. MyttonC. J. Livesey OriginalPaper Pages: 299 - 305
Relative effectiveness of various types and methods of zinc application on rice and maize crops grown in calcareous soil A. P. SinghR. SakalB. P. Singh OriginalPaper Pages: 315 - 322
Effect of crop residue addition on arylsulphatase activity in soils P. PerucciL. Scarponi OriginalPaper Pages: 323 - 326
The influence of heavy metals upon the growth of sitka-spruce in South Wales forests K. W. BurtonE. MorganA. Roig OriginalPaper Pages: 327 - 336
Chemical transformation and plant availability of zinc salts added to organic manure R. A. SinghaniaE. RietzD. R. Sauerbeck OriginalPaper Pages: 337 - 344
Influence of chelating agents on the uptake of239Pu and241Am by plants B. N. VyasK. B. Mistry OriginalPaper Pages: 345 - 353
Micronutrients and nitrogen metabolism K. S. DhillonB. A. YagodeenA. C. Pleshkov OriginalPaper Pages: 355 - 363
Leaching losses of nutrients in oil palm plantations determined by tension lysimeters U. OmotiD. O. AtagaA. E. Isenmila OriginalPaper Pages: 365 - 376
Studies on copper and cobalt tolerance in three closely related taxa within the genusSilene L. (Caryophyllaceae) from Zaïre A. J. M. BakerR. R. BrooksF. Malaisse OriginalPaper Pages: 377 - 385
Re-establishment of indigenous vesicular-arbuscular mycorrhizal fungi after topsoil storage A. Warner OriginalPaper Pages: 387 - 394
Isolation, purification and chemical composition of maize root cap slime Annie Chaboud OriginalPaper Pages: 395 - 402
Rehabilitation of cocoa (Theobroma cacao L.) in Nigeria: major problems and possible solutions S. A. Ayanlaja OriginalPaper Pages: 403 - 409
Accumulation of ammonium-N and amino-N in theAzolla-Anabaena association H. F. TungI. Watanabe Short Communications Pages: 413 - 419
A technique for estimating fine root production in the forest ecosystems Muhamad-Nasir HamzahBruce L. HainesRobert L. Todd Short Communications Pages: 421 - 423
The influence of background solution on root responses to aluminium inHolcus lanatus L. S. McCainM. S. Davies Short Communications Pages: 425 - 430
Diffusion du15N2 dans le sol pendant la mesure de fixation biologique de l'azote M. P. FernandezF. R. Warembourg Short Communications Pages: 431 - 434
A comparison of methods, including angled and vertical minirhizotrons, for studying root growth and distribution in a spring oat crop P. L. BraggG. GoviR. Q. Cannell Short Communications Pages: 435 - 440
A method for measuring length, spatial distribution and distances of living rootsin situ A. Fusseder Short Communications Pages: 441 - 445