Organic nitrogen compounds extracted from arable and forest soils by electro-ultrafiltration and recovery rates of amino acids K. NémethH. BartelsK. Mengel OriginalPaper Pages: 271 - 275
Biodegradation of metolachlor in a soil perfusion experiment S. -Y. LiuR. ZhangJ. -M. Bollag OriginalPaper Pages: 276 - 281
A microcosm study on the respiration and weight loss in birch litter and raw humus as influenced by soil fauna H. SetäläJ. HaimiV. Huhta OriginalPaper Pages: 282 - 287
The hormone-like effect of earthworm casts on plant growth U. TomatiA. GrappelliE. Galli OriginalPaper Pages: 288 - 294
Measurement of pH at the root surface of red clover (Trifolium pratense) grown in soils differing in proton buffer capacity Rudolf HauterKonrad Mengel OriginalPaper Pages: 295 - 298
Biotoxicity and persistence of nonylphenol during incubation in a compost-sandstone mixture M. TrocméJ. TarradellasJ-C. Védy OriginalPaper Pages: 299 - 303
Effects of animal manure and mineral fertilizer on the total carbon and nitrogen contents of soil size fractions Bent T. Christensen OriginalPaper Pages: 304 - 307
Organic phosphorus compounds as a phosphorus source for higher plants through the activity of phosphatases produced by plant roots and microorganisms J. C TarafdarN. Claassen OriginalPaper Pages: 308 - 312
Influence of phenamiphos on the vesicular-arbuscular mycorrhizal symbiosis in Leucaena leucocephala M. HabteA. Manjunath OriginalPaper Pages: 313 - 316
Effect of cellulose and straw incorporation in soil on total denitrification and nitrogen immobilization at initially aerobic and permanent anaerobic conditions M. GökJ. C. G. Ottow OriginalPaper Pages: 317 - 322
Axial pressures generated by the earthworm Aporrectodea rosea B. M. McKenzieA. R. Dexter OriginalPaper Pages: 323 - 327
Radial pressures generated by the earthworm Aporrectodea rosea B. M. McKenzieA. R. Dexter OriginalPaper Pages: 328 - 332
Vesicular-arbuscular mycorrhizal status of various crops in different agricultural soils of northern Greece P. JeffriesT. SpyropoulosE. Vardavarkis OriginalPaper Pages: 333 - 337
Effect of phosphorus fertilization on blue-green algal inoculum production and nitrogen yield under field conditions R. N. BisoyiP. K. Singh OriginalPaper Pages: 338 - 343
The effect of fertilisation on soil nitrifier activity in experimental grassland plots D. W. HopkinsA. G. O'DonnellR. S. Shiel OriginalPaper Pages: 344 - 349
Physiological and symbiotic characteristics of Rhizobium fredii isolated from subtropical-tropical soils C. C. YoungJ. Y. ChangC. C. Chao OriginalPaper Pages: 350 - 354