Plant and Soil 123: 301-303, 1990.

Contents of Volume 123 1990

Volume 123, No. 1

A. A. Meharg and K. Killham, The effect of soil pH on rhizosphere carbon flow of Lolium perenne 1 J. J. Lucena, A. G~.rate, A. M. Ramon and M. Manzanares, Iron nutrition of a hydroponic straw-

berry culture (Fragaria vesca L.) supplied with different Fe chelates 9 A. E. Linkins, R. L. Sinsabaugh, C. A. McClaugherty and J. M. Melills, Cellulase activity on

decomposing leaf litter in microcosms 17 A. Piccolo and J. S. C. Mbagwu, Effects of different organic waste amendments on soil microag-

gregates stability and molecular sizes of humic substances 27 D. C. Whitehead, A. W. Bristow and D. R. Lockyer, Organic matter and nitrogen in the unhar-

vested fractions of grass swards in relation to the potential for nitrate leaching after ploughing 39 C. B. Christianson, A. Bationo and W. E. Baethgen, The effect of soil tillage and fertilizer use on

pearl millet yields in Niger 51 G. M. Farias and G. J. Griffin, Extent and pattern of early soybean seedling colonization by

Fusarium oxysporum and F. solani in naturally infested soil 59 Z. Javid and R. F. Fisher, Fertilization influences nitrogen dynamics in soils under Dalbergia

sissoo 67 A. G. Bengough and C. E. Mullins, The resistance experienced by roots growing in a pressurised

cell: A reappraisal 73 S. D. Hong, R. H. Fox and W. P. Piekielek, Field evaluation of several chemical indexes of soil

nitrogen availability 83 E. Otabbong, Chemistry of Cr in some Swedish soils. V. Interaction between CrO 3 and Si(OH)4

and its impact on Cr toxicity and elemental contents in ryegrass (Lolium perenne) 89 R. McSorley and D. W. Dickson, Vertical distribution of plant-parasitic nematodes in sandy soil

under maize 95 A. D. Mackay, J. R. Caradus and M. W. Pritchard, Variation for aluminium tolerance in white

clover 101 H. Sieghardt, Heavy-metal uptake and distribution in Silene vulgaris and Minuartia vema growing

on mining-dump material containing lead and zinc 107

Short communications P. J. Cotterill, Influence of grass proportion in stands of burr medic and subterranean clover on

legume re-establishment and productivity following wheat 113 N. D. Majumder, S. C. Rakshit and D. N. Borthakur, Genetic effect on uptake of selected nutrients

in some rice (O. sativa L.) varieties in phosphorus deficient soils 117 H. Bolton, Jr., L. F. Elliott, R. F. Turco and A. C. Kennedy, Rhizoplane colonization of pea

seedlings by Rhizobium leguminosarum and a deleterious root colonizing Pseudomonas sp. and effects on plant growth 121

M. T. Ogan, The nodulation and nitrogenase activity of natural stands of mangrove legumes in a Nigerian swamp 125

301

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Volume 123, No. 2

B. Sattelmacher, F. Klotz and H. Marschner, Influence of the nitrogen level on root growth and morphology of two potato varieties differing in nitrogen acquisition 131

J. Wieneke, Phosphorus efficiency and phosphorus remobilization in two sorghum (Sorghum bicolor (L.) Moench) cultivars 139

V. RSmheld and H. Marschner, Genotypical differences among graminaceous species in release of phytosiderophores and uptake of iron phytosiderophores 147

B. Feil, R. Thiraporn, G. Geisler and P. Stamp, Root traits of maize seedlings - indicators of nitrogen efficiency? 155

H. M. Helal, Varietal differences in root phosphatase activity as related to the utilization of organic phosphates 161

J. R. Caradus, The effect of shoot and root genotype on phosphorus concentrations of shoots and roots 165

P. Burauel, J. Wieneke and F. F~hr, Carbohydrate status in roots of two soybean cultivars: A possible parameter to explain different efficiencies concerning phosphate uptake 169

R. Pinton, Z. Varanini and A. Maggioni, Properties of potassium uptake by seedling roots of grape cultivars 175

S. Bottacin, M. Saccomani and G. Ferrari, Sterol content and efficiency of ion uptake by roots of maize genotypes 181

R. Baas and M. L. van Beusichem, Genetic differentiation in Plantago major L. in growth and P uptake under conditions of P limitation 185

C. J. T. Spittersl- and A. H. C. M. Schapendonk, Evalutation of breeding strategies for drought tolerance in potato by means of crop growth simulation 193

S. Schubert and A. L&uchli, Sodium exclusion mechanisms at the root surface of two maize cultivars 205

L. M. Gourley, S. A. Rogers, C. Ruiz-Gomez and R. B. Clark, Genetic aspects of aluminum tolerance in sorghum 211

Y. I. Mladenova, Influence of salt stress on primary metabolism of Zea mays L. seedlings of model genotypes 217

A. Aniol, Genetics of tolerance to aluminium in wheat (Triticum aestivum L. Thell) 223 H. M. Helal, H. Arisha and E. Rietz, The uptake of trace elements by spinach and bean varieties

of different root parameters 229 F. J. M. Maathuis and H. B. A. Prins, Electrophysiological membrane characteristics of the salt

tolerant Plantago maritima and the salt sensitive Plantago media 233 E. Alcantara, M. Fernandez and M. D. de la Guardia, Genetic studies on the acidification capacity

of sunflower roots induced under iron stress 239 D. Kuiper, J. Schuit and P. J. C. Kuiper, Actual cytokinin concentrations in plant tissue as an

indicator for salt resistance in cereals 243 M. C. Saxena, R. S. Malhotra and K. B. Singh, Iron deficiency in chickpea in the Mediterranean

region and its control through resistant genotypes and nutrient application 251 G. Jagnow, Differences between cereal crop cultivars in root-associated nitrogen-fixation,

possible causes of variable yield response to seed inoculation 255 C. Diederichs, Improved growth of Cajanus cajan (L.) Millsp. in an unsterile tropical soil by three

mycorrhizal fungi 261 N. S. Wilhelm, R. D. Graham and A. D. Rovira, Control of Mn status and infection rate by

genotype of both host and pathogen in the wheat take-all interaction 267 S. Akita and G. S. Cabuslay, Physiological basis of differential response to salinity in rice cultivars 277 Errata to Loren W. Tauer, "Economic impact of future biological nitrogen fixation technologies on

United States agriculture", Plant and Soil, Volume 119 (1989): 261-270 295 Instructions to authors 297

Author index

Akita, S., 277 Alcantara, E., 239 Aniol, A., 223 Arisha, H., 229 Baas, R., 185 Baethgen, W.E., 51 Bationo, A., 51 Bengough, A.G., 73 Bolton, H., Jr., 121 Borthakur, D.N., 117 Bottacin, S., 181 Bristow, A.W., 39 Burauel, P., 169 Cabuslay, G.S., 277 Caradus, J.R., 101,165 Christianson, C.B., 51 Clark, R.B., 211 Cotterill, P.J., 113 de la Guardia, M.D., 239 Dickson, D.W., 95 Diederichs, C., 261 Elliott, L.F., 121 Farias, G.Mo, 59 Feil, B., 155 Fernandez, M., 239 Ferrari, G., 181 Fisher, R.F., 67 Fox, R.H., 83 F0hr, F., 169 Garate, A., 9 Geisler, G., 155

Gourley, L.M., 211 Graham, R.D., 267 Griffin, G.J., 59 Helal, H.M., 161,229 Hong, S.D., 83 Jagnow, G., 255 Javid, Z., 67 Kennedy, A.C., 121 Killham, K., 1 Klotz, F., 131 Kuiper, D., 243 Kuiper, P.J.C., 243 L&uchli, A., 205 Linkins, A.E., 17 Lockyer, D.R., 39 Lucena, J.J., 9 Maathuis, F.J.M., 233 Mackay, A.D., 101 McClaugherty, C.A., 17 McSorley, R., 95 Maggioni, A., 175 Majumder, N.D., 117 Malhotra, R.S., 251 Manzanares, M., 9 Marschner, H., 131,147 Mbagwu, J.S.C., 27 Meharg, A.A., 1 Melills, J.M., 17 Mladenova, Y.I., 217 Mullins, C.E., 73 Ogan, M.T., 125

Otabbong, E., 89 Piccolo, A., 27 Piekielek, W.P., 83 Pinton, R., 175 Prins, H.B.A., 233 Pritchard, M.W., 101 Rakshit, S.C., 117 Ramon, A.M., 9 Rietz, E., 229 Rogers, S.A., 211 Rbmheld, V., 147 Rovira, A.D., 267 Ruiz-Gomez, C., 211 Saccomani, M., 181 Sattelmacher, B., 131 Saxena, M.C., 251 Schapendonk, A.H.C.M., 193 Schubert, S., 205 Schuit, J., 243 Sieghardt, H., 107 Singh, K.B., 251 Sinsabaugh, R.L., 17 Spittersl-, C.J.T., 193 Stamp, P., 155 Thiraporn, R., 155 Turco, R.F., 121 van Beusichem, M.L., 185 Varanini, Z., 175 Whitehead, D.C., 39 Wieneke, J., 139, 169 Wilhelm, N.S., 267

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