Field technique using the acetylene reduction method to assay nitrogenase activity and its association with the rice rhizosphere Kuk-Ki LeeBonifacio AlimagnoTomio Yoshida OriginalPaper Pages: 519 - 526
Nitrate concentrations under winter wheat and in fallow soil during summer at Rothamsted M. B. PageO. Talibudeen OriginalPaper Pages: 527 - 540
Neutroperiodism in different varieties of groundnut with respect to zinc and its uptake as affected by phosphorus application R. S. ChahalS. P. S. Ahluwalia OriginalPaper Pages: 541 - 546
Effect of soil solution phosphorus in Volcanic Ash soils on the response of tomato (Lycopersicum esculentum) to added phosphate Mary MacfarlaneD. Walmsley OriginalPaper Pages: 547 - 558
A comparison of the susceptibility of Arrhen atherum elatius (L.) beauv. Ex J. C. Presl, Agrostis tenuis sibth, Deschampsia flexuosa and Festuca ovina L. to manganese toxicity A. MahmoudJ. P. Grime OriginalPaper Pages: 559 - 565
The effect of fallow and continuous cultivation on the chemical and physical properties of an alfisol in western Nigeria A. S. R. JuoR. Lal OriginalPaper Pages: 567 - 584
Some measures of reducing leaching loss of nitrates beyond potential rooting zone Bijay SinghG. S. Sekhon OriginalPaper Pages: 585 - 591
Experiments on effects of phosphorus on the manganese nutrition of plants P. H. Le Mare OriginalPaper Pages: 593 - 605
Experiments on effects of phosphorus on the manganese nutrition of plants P. H. Le Mare OriginalPaper Pages: 607 - 620
Experiments on effects of phosphorus on the manganese nutrition of plants P. H. Le Mare OriginalPaper Pages: 621 - 630
Temperature changes and the geotropic reaction of the radicle of zea mays L. S. C. SheppardM. H. Miller OriginalPaper Pages: 631 - 644
Enzymatic studies on ninhydrin-positive compounds exuded by root tips of pea seedlings A. W. S. M. van Egeraat OriginalPaper Pages: 645 - 651
Effect of aluminum on growth and mineral elements of al-tolerant and Al-intolerant corn R. B. Clark OriginalPaper Pages: 653 - 662
Characterizing soil fertility by ion diffusive flux measurements T. W. MasseeR. A. OlsenE. O. Skogley OriginalPaper Pages: 663 - 678
Patulin effects on wheat plants in field treatments James R. EllisFred A. NorstadtT. M. Mccalla OriginalPaper Pages: 679 - 686
Growth requirements of Rhizobium leguminosarum, strain PRE A. W. S. M. van Egeraat Short Communication Pages: 699 - 702
Associative nitrogenase activity by some Hawaiian grass roots B. L. Koch Short Communication Pages: 703 - 706
Cobalt and nickel in Rinorea species R. R. BrooksE. D. WitherB. Zepernick Short Communication Pages: 707 - 712
Measurement of amount of nitrogen fixed by a legume crop Maurice FriedVictor Middelboe Short Communication Pages: 713 - 715
Effect of a formulation of urea, thiourea and humate on nitrogen availability and yield of wheat K. C. Khandelwal Short Communication Pages: 717 - 719