Table Of Content

Soil& Tillage Research, 21 (1991) 391-393 Elsevier Science Publishers B.V., Amsterdam Contents of Soil & Tillage Research, Volume 21 VOL. 21 NOS. 1-2 OCTOBER 1991 Tillage effects on corn in sandy soils in relation to water retentivity nutrient and water management, and seasonal evaporativity V.K. Arora, P.R. Gajri and S.S. Prihar (Ludhiana, India) Evaluation of shallow tillage for spring cereals on a fine sandy loam 1. Growth and yield components, N accumulation and tillage economics M.R. Carter (Charlottetown, P.E.1., Canada) Evaluation of shallow tillage for spring cereals on a fine sandy loam 2. Soil physical, chemical and biological properties M.R. Carter (Charlottetown, P.E.I., Canada) Long-term experiment with straw management, stubble cultivation, autumn and spring ploughing on a clay soil in S.E. Norway A. Njos and T. Borresen (As-NLH, Norway ) Tillage and water content effects on surface soil physical properties H.P. Cresswell, D.J. Painter and K.C. Cameron (Canterbury, New Zealand ) Possibilities of mechanical post-emergence weed control in sugar beet J.K. Kouwenhoven, J.D.A. Wevers and B.J. Post (Wageningen, Netherlands ) Effect of tillage on some soil properties, plant development and yield of spring wheat (Triticum aestivum L.) in stony soil G.A. Agenbag and P.C.J. Maree (Stellenbosch, Republic of South Africa) Allelopathic activity of decomposing straw of wheat and oat and associated soil on some crop species L.S. Dias (Evora, Portugal ) Wear testing of enamel coated rings V.M. Salokhe, D. Gee-Clough and P. Tamtomo (Bangkok, Thailand ) Triazine herbicide residues in corn production systems: effects of tillage, application rate and liming on persistence E.J. Lazowski and J.K. Hall (University Park, PA, USA) Short Communication Effect of puddling (wet tillage )o n rice yield and physico-chemical properties of soil K. Saroch and R.C. Thakur (Palampur, India) se Book Review Soil Science Special Section: Soil Cultivation Conference, Klepp, Norway Guest Editorial Ploughing vs. non-ploughing A. Njos (Aas-NLH, Norway) Soil cultivation in relation to “our common future” and sustainable global development S. Sundsbo (Oslo, Norway ) 392 Agronomic aspects of ploughing and non-ploughing H. Kuipers (Wageningen, Netherlands) Ploughing and non-ploughing techniques G. Spoor (Silsoe, UK) Plowing and non-plowing under Nordic conditions R. Heinonen (Helsinki, Finland ) Conclusions Conclusions of the soil cultivation conference 1989 at Klepp, Norway A. Njos (Aas-NLH, Norway ) Guide for Authors VOL. 21 NOS. 3-4 NOVEMBER 1991 A laboratory study of the residual influence of some amendments on the reconsolidation of disturbed Salisbury silt loam G.T. Owen (Ottawa, Ont., Canada), J.E. Richards ( Fredericton, N.B., Canada) and D.C. Main (Charlottetown, P.E.I., Canada) Effects of size and incorporation of synthetic mulch on runoff and sediment yield from interrills in a laboratory study with simulated rainfall J.W.A. Poesen (Leuven, Belgium) and H. Lavee (Ramat Gan, Israel) Economics of tillage systems for spring wheat production in southwestern Saskatchewan (Canada) R.P. Zentner, S. Tessier, M. Peru, F.B. Dyck and C.A. Campbell (Swift Current, Sask., Canada) Tillage effects on rain-generated wetting front migration through a Griswold silt loam soil B.C. Datiri and B. Lowery (Madison, WI, USA) Effects of conservation tillage on hydraulic properties of a Griswold silt loam soil B.C. Datiri and B. Lowery (Madison, WI, USA) Cyclic variation in moldboard plow draft and its effect on implement control systems N. Singh, G. Singh and V.M. Salokhe (Bangkok, Thailand) Corn growth response to K fertilization on three compacted soils R.P. Wolkowski (Madison, WI, USA) Tillage force prediction from terrain characterization with the bevameter W.K. Bilanski (Guelph, Ont., Canada) and R.L. Kushwaha (Saskatoon, Sask., Effects of soil physical conditions on root growth and water use of barley grown in containers S.J. Bamford, C.J. Parker and M.K.V. Carr (Bedford, UK) Characterizing compaction effects on soil properties and crop growth in southern Nigeria B. Kayombo (Morogoro, Tanzania), R. Lal (Columbus, OH, USA), G.C. Mrema (Gaborone, Botswana) and H.E. Jensen (Copenhagen, Denmark ) Zero-tillage furrow opener effects on seed environment and wheat emergence S. Tessier (Quebec, Que., Canada), K.E. Saxton, R.I. Papendick and G.M. Hyde (Pullman, A conservation tillage research update from the Coastal Plain Soil and Water Conservation Research Center of South Carolina: A review of previous research R.E. Sojka (Kimberly, ID, USA), D.L. Karlen (Ames, IA, USA) and W.J. Busscher (Florence, SC, USA) Short Communication Core sampling technique for bulk density and porosity determination on a clay loam soil J.A. Stone (Harrow, Ont., Canada) Book Review Fertilizer technology Author Index