GANTZER, C.J. and G.R.BLAKE 1 Physi'cal characteristics of Le Sueur clay loam soil following no-till and conventional tillage. Agronomy Journal 70(1978)5:853-857. 22 1it.refs.

MOKMA, D.L., L.S.ROBERTSON and A.E.ERICSON / Soil management groups An inventory of s o i l physical properties. J. of Soil and Water Conservation 33(1978)5:240-242. 9 1it.refs.

THOMASSON, A.J'. / Towards an objective classification of soil structure. J. of Soil Sci. 29(1978)1:38-46. 14 1it.refs.

SOIL MOISTURE

MERIAUX, S . / Panorama des recherches de 1'INRA concernant l'eau et le s o l . Hydrogéologie (1978)2:115-122. 59 1it.refs.

CRONAN, C.S. / A soil column tension lysimeter that minimizes \ experimental edge effects.

Soil Sci. 125(1978)5:306-309. 12 1it.refs.

STREBEL, O. and M.RENGER f Einfluss von Vegetations- und Bodenunter- schieden auf den Bodenwasserhaushalt. Berichte Über Landwirtschaft 55(1977)4:646-651. 24 1it.refs.

ACHARYA, C.L. and I.P.ABROL 1 Exchangeable sodium and soil water behaviour under field conditions. Soil Sci. 125(1978)5:310-319. 15 1it.refs.

TSCHAPEK, M . , C.O.SCOPPA and C.WASOWSK1 / The surface tension of soil water. J. of Soil Sci. 29(1978)1:17-21. 5 1it.refs.

HUMBEL, F.X. / Caractgrisation, par des mesures physiques, hydriques et d'enracinement, de s o l s de Guyane franGaise 1 dynamique de l'eau superficielle. Science du S o l (1978)2:83-94. 7 1it.refs.

BABALOLA, O. / Spatial variability of s o i l water properties in tropical soils .of Nigeria. Soil Sci. 126(1978)5:269-279. 14 1it.refs.

50

I( HALL, A.E. and C.DANCETTE / Analysis of fallow-farming systems in semi- arid Africa using model to simulate the hydrologic budget. Agronomy Journal 70(1978)5:816-823. 16 1it.refs. Map.

Soil moisture content

SLACK, D.C., C.T.HAAN and L.G.WELLS '/ Modeling soil water movement into plant roots. Transactions ASAE 20(1977)5:919-927, 933. 48 1it.refs.

WILLATT, S.T. and H.M.TAYL0R / Water uptake by soya-bean roots as affected by their depth and by soil water content. J. of Agric. Sci. 90(1978)1:205-213. 20 1it.refs.

GREGORY, P.J., M. McGOWAN and P.V.BISCOE / Water relations of winter wheat. 2: Soil water relations. J. of Agric. Sci. 91(1978)1:103-116. 34 1it.refs.

VERASAN, V. and R.E.PHILLIPS / Effects of soil water stress on growth and nutrient accumulation in corn. Agronomy Journal 70(1978)4:613-618. I O 1it.refs.

RICKMAN, R.W., R.R.ALLMARAS and R.E.RAMIG / Root-sink descriptions of water supply to dry-land wheat. Agronomy Journal 70(1978)5:723-728. 13 1it.refs.

BECHER, H.H. 1 Wasserspannungsabhängiger Eindringwiderstand von Modellboden. Z.f.Pf1anzenernahrung & Bodenkunde 141(1978)5:621-633. 18 1it.refs.

GERMANN, P., W.VOGELSANGER, P.LÜSCHER et a l . / Kontinuierliche Ausfluss- methode zur Bestimmung der Desorptionskurve und der Wasserleitfähig- keit im ungesattigten Boden. Mitt . Dt sch. Bodenkundl. Gesellschaf t 26 ( 1978) 2 19'228. 2 1it.refs.

GUENNELON, R. and B.CABIDEL / Applications diverses de la méthode d'humidimétrie neutronique au contrsle et ?i l'utilisation des réserves hydriques des s o l s . Annales Agronomiques 28(1977)5:489-502. 1 lit.ref.

CHIAVERINI, J. and R.GRAS / Comparaison de quelques méthodes d'évaluation au laboratoire de la capacité au champ. Annales Agronomiques 28(1977)4:445-461. 20 1it.refs.

51

POULOVASSILIS, A. and W.M.EL-GHAMRY to scanning curves of any order Soil Sci. 126(1978)1:1-8. 13 1it.refs.

/ The in hyst

dependent domain t :eretic soil water

:heory relati

app 1 i onshi

TOMAR, V.S. and B.P.GHILDYAL / Estimation of field-soil-water retention characteristics. J. of the Indian Soc. of S\oil Sci. 26(1978)2:93-97. 13 1it.refs.

RIVERS, E.D. and R.F.SHIPP f Soil water retention as related to particle size in selected sands and loamy sands. Soil Sci. 126(1978)2:94-100. 7 1it.refs.

MURTHY, R.S., H.S.SHANKARANAFL4YANA and L.R.HIREKERUR / Interpretation of soil map for available moisture i n a given climatic type. J. of the Indian Soc. of Soil Sci. 26(1978)1:63-70. 14 1it.refs.

CLAUSNITZER, J. / Die Hysterese der Wasserretentionskurve in SandbÖden. Archiv f. Acker- u.Pflanzenbau & Bodenkunde 22(1978)2:79-87. 12 1it.refs.

-KUNTZE, H. and W.BURGHARDT / Die Entwicklung der Bodenfeuchte Deutscher Hochmoorkulturen in einem Trockenjahr. Telma 7(1977)55-64. 8 1it.refs.

BECHER, H.H. / Pelosols. Geoderma 21 20 1it.refs

AFSHAR, A. and M considering

Wasserspannungsabhangiger Eindringungswiderstand eines

1978)2:105-118.

A.MARINO / Model for simulating soil-water content evapotranspiration.

J. of Hydrology 37( 1978) 314: 309-322. 15 1it.refs.

BASAK, P . / Evaporation from horizontal soil columns with variable dif f usivi ty . J. of Hydrology 37(1978)1/2:129-136. 7 1it.refs.

SCHRUDER, G. and G.SCHWERDTFEGER / Schwankungen der Verdunstungen in der bodennahen Luftschicht. Mitt. Dtsch. Bodenkundl. Gesellschaft 26(1978)41-49. 5 1it.refs.

GAYLE, G.A. and R.W.SKAGGS f Surface storage on bedded cultivated lands. Transactions ASAE 21(1978)1:101-104, 109. 8 lit.reEs.

52

Measurement of soil moisture

SEMINAIRE sur “Les applications de la méthode neutrique en agronomie et en hydrogéologie”, Cadarache 16-18 novembre 1976. Annales Agronomiques 28(1977)5:463-559.

WILLIAMS, T.H.L. 1 An automatic scanning and recording tensiometer system. J. of Hydrology 39(1978)1/2:175-183. 6 1it.refs.

KOVACS, G. / Evaluation of measurement of soil moisture. Int. Commission on Irrig. and Drainage. Int. Round Table Conference on Evapotranspiration. 19 pp.

HANKIN, L. and B.L.SAWHNEY- 1 Soil moisture determination using microwave radiation. Soil Sci. 126(1978)5:313-315., 5 1it.refs.

BOELS, D., J.B.H.M. van GILS, G.J.VEERMAN et al. / Theory and system of automatic determination of soil moisture characteristics and unsatura- ted hydraulic conductivities. Soil Sci. 126(1978)4:191-199. 24 1it.refs.

DAUDET, F.A. and G.VACHAUD 1 La mesure neutronique du stock d’eau du sol et des variations. Application 5 la détermination du bilan hydrique. Annales Agronomiques 28(1977)5:503-519. 4 1it.refs.

COUCHAT, Ph. / Aspects méthodologiques et technologiques de la mesure neutronique de l’humidité des s o l s . Annales Agronomiques 28(1977)5:477-488.

TRICKER, A . S . / The infiltration cylinder. Some comments on its use. J. of Hydrology 36(1978)3/4:383-391. I O 1it.refs.

BAKER, F.G. / Factors- influencing the crust test for in situ measurement of hydraulic conductivity. Soil Sci. Soc.of America Journal 41(1977)6:1029-1032. 14 1it.refs.

EHWALD, E.,’ W.KRUGER and H.BENKENSTEIN / Verfahren zur Ermittlung der Wasserdurchlassigkeit in skeletthaltigen BÖderi. Archiv f.Acker- u.Pflanzenbau i? Bodenkunde 22(1978)1:3-13. 7 1it.refs.

53

SO, H.B., L.A.G.AYLMORE and J.P.QUIRK / Measurement of water fluxes and potentials in a single root-soil system. 11. Applications of tensiometer-potentiometer system. Plant and Soil 49(1978)3:461-475. 16 1it.refs.

Flow

RAATS, P.A.C. / Convective transport of solutes by steady flows. I. General theory. Agric. Water Management 1(1977)3:219-232. 31 1it.refs.

SELIM, H.M. / Transport of reactive solutes during transient, unsaturated water flow in multilayered soils. Soil Sci. 126(1978)3:127-135. 14 1it.refs.

LOMEN, D.O. and A.W.WARRICK / Time-dependent solutions to the one-dimensio- na1 line-arized moisture flow equation with water extraction. J . of Hydrology 39(1978)1/2:59-67. 12 1it.refs.

WATSON, K.K. and F.D.WHISLER / The use of dynamic soil water characteris- tics in a numerical desorption model. Soil Sci. 125(1978)2:83-91. I 1 1it.refs.

BIERMANS, M.B.G.M., K.M.DIJKEMA and D.A. de VRIES / Water movement in porous media towards an ice front. J. of Hydrology 37(1978)1/2:137-148. 1 1 1it.refs.

ZARADNY, H. / Boundary conditions in modeling water flow in unsaturated soils. Soil Sci. 125(1978)2:75-82. 20 1it.refs.

HAYHOE, H.N. / Study of the relative efficiency of finite difference and Galerkin techniques for modeling soil-water transfer. Water Res. Research 14(1978)1 :97-102. 14 1it.refs.

BRESLER, E . / Theoretical modeling of mixed-electrolyte solution flows for unsaturated soils. Soil Sci. 125(1978)4:196-203.

. 20 1it.refs.

WIERENGA, P.J. / Solute distribution profiles computed with steady-state and transient water movement models. Soil Sci.Society of America Journal 41(1977)6:1050-1055. 23 1it.refs.

54

HAYHOE, H.N. / Numerical study of quasi-analytic and finite difference solutions of the soil-water transfer equation. Soil Sci. 125(1978)2:68-74. 9 1it.refs.

ROUTSON, R.C. and D.J.BROWN / Frontal movement of aqueops solutions during redistribution through air-dry sand columns as a function of column length and time. Soil Science 125(1978)5:320-325. 19 1it.refs.

THOMAS, G.W., R.E.PHILLIPS and V.L.QUISENBERRY / Characterization of water displacement in soils using simple chromatographic theory. J . o f Soil Sci. 29(1978)1:32-37. 6 1it.refs.

Infiltration

GIFFORD, G.F. and R.H.HAWKINS / Hydrologic impact of grazing on infiltration. A critical review. Water Res. Research l4( 1978)2 : 305-31 3. 37 1it.refs.

KRAMER, D., W.KRÜGER, A.HESSE et al. / Einfluss der Aufbereitung von GÜlle auf ihre Infiltration in BÖden. Archiv Acker- und Pflanzenbau 8 Bodenkunde 22(1978)6:335-342. 2 1it.refs.

HORNUNG, U. / Genauigkeit von expliziten und impliziten Verfahren zur numerischen Simulation von Infiltration. Mitt. Dtsch.Bodenkund1. Gesellschaft 26(1978)175-182. 9 1it.refs.

STEENHUIS, T.S., G.D.BUBENZER and M.F.WALTER / Water movement and infiltration in a frozen soil. Theoretical and experimental considerations. Paper No.77-2545: Winter Meeting 1977 Chicago. St.Joseph, Michigan, American Soc. of Agricultural Engineers, 1977. 31 pp. 27 1it.refs. .

TURNER, D.P. and M.E.SUMNER / The influence of initial soil moisture content on field measured infiltration rates. Water SA 4(1978)1:18-24. 23 lit.refs.

ARON, G., A.C.MILLER Jr., and D.F.LAKATOS / Infiltration -formula based on SCS curve number. Journal of the Irrig. and Drainage Div. 103(1977)4:419-427.' 9 1it.refs.

55

BOUW, J., L.W.DEKKER and J.H.M.WÖSTEN A case study on infiltration into dry clay'soil. I. Morphological observations. 11. Physical measurements. Geoderma 20(1978)1:27-40, 41-51. 15 + 6 1it.refs. '

LIN, S.H. f Transient water infiltration with constant surface flux. .J. of Hydrology 37(1978)3/4:387-392.

I I lit.refs.

VACHAUD, G., C.DANCETTE, S.SONK0, et al. / Méthodes de caractérisation hydrodynamique in situ d'un s o l non saturé. Application 5 deux types de s o l du Sénégal en vue de la détermination des termes du bilan hydrique. Annales Agronomiques 29(1978)1:1-36. 22 1it.refs.

WEISE, K. / Ergebnisse von mehrjahrigen Sickerwassermessungen auf unterschiedlichen Standorten. Archiv Acker- u. Pflanzenbau & Bodenkunde 22( 7 lit.refs.

CHU, S.T. / Infiltration during an unsteady rain Water Res. Research 14(1978)3:461-466. 12 1it.refs.

MOREL-SEYTOUX, H.J. / Derivation of equations fo infiltration. Water Res. Research 14(1978)4:561-568. 9 lit.refs.

978)5:285-292.

variable rainfall

PASHKOVSKIJ, I. / Un modèle d'infiltration dans un milieu à macrocapillaires. Hydrogéologie (1978)1:29-34. 7 1it.refs.

Hydraulic conductivity

CLAFF, R.B. and G.M.HORNBERGER / Empirical equations for some s o i l hydraulic properties. Water Res. Research 14(1978)4:601-604. 15 1it.refs.

HORN, R. and K.H.HARTGE / Die Veranderung der gesättigten Wasser- leitfähigkeit kunstlicher Sand-Schluff-Gemische in Abhangigkeit vom hydraulischen Gradienten. Rasen-Turf-Gazon 9(1978)1:-6-9. 8 1it.refs.

56

BORER, F. / Überlegungen zum Einfluss der bodenphysikalischen Parameter k(S) und i auf die Berechnung der Tiefensickerung und auf die Wasser- bilanz. Mitt. Dtsch. Bodenkundl. Gesellschaft 26(1978)133-141. 3 1it.refs.

KRUGER, W. and E.EHWALD / Zusammenhange zwischen Wasserdurchlassigkeit und anderen Bodenparametern in skeletthaltigen Substraten. Archiv f.Acker- und Pflan,zenbau & Bodenkunde 22(1978)1:15-22. 8 1it.refs.

DANE, J.H. / Calculation of hydraulic conductivity decreases in the presence of mixed NaCl-CaCl2 solutions. Canadian J. of Soil Sci. 58(1978)2:145-152. 19 1it.refs.

DANE, J . H . and A.KLUTE / Salt effects on the hydraulic properties of a swelling soil. Soil Sci. Society of America Journal 41(1977)6:1043-1049. 24 lit-refs.

DOUGLAS, E. and E.McKYES / Compaction effects on the hydraulic conductivity of a clay soil. Soil Sci. 125(1978)5:278-282. 7 1it.refs.

MUALEM, Y. and G.DAGAN / Hydraulic conductivity of soils. Unified approach to the statistical models. Soil Sci. Soc. of America Journal 42(1978)3:392-395. 12 1it.refs.

OLSSON, K.A. and C.W.ROSE / Hydraulic properties of a red-brown earth determined from in situ measurements. Australian Journal of Soil Research 16(1978)2:169-180. 31 lit.reEs.

MUALEM, Y. / Hydraulic conductivity of unsaturated porous media. Generalized macroscopic approach. Water Res. Research 14(1978)2:325-334. 41 lit-refs.

BAKER, F.G. / Variability of hydraulic conductivity within and between nine Wisconsin soil series. Water Res. Research 14(1978)1:103-108. 17 1it.refs.

PRASAD, K.G. and N.F.PERKINS / In situ hydraulic conductivity of a fragipan s o i l in the Southern Coastal Plains. Soil Sci. 126(1978)5:263-268. 21 1it.refs.

57

Le aching

WASHING out of heavy metals on cultivated soils. Wageningen, PUDOC, 1977. 1 p. 14 1it.refs.

UHLEN, G. / Nutrient leaching and surface runoff in field lysimetres on i

cultivated soil. I. Runoff measurements, water composition and nutrient balances. Meldinger fra Norges Landbrukshdgskole 57(1978)27:26 pp. 30 1it.refs.

UHLEN, G. / Nutrient leaching and surface runoff in field lysimetres on cultivated soil. 11. Effects of farm yard manure spread on a frozen ground and mixed in the soil on water pollution. Meldinger fra Norges Landbrukshdgskole 57(1978)28:23 pp. 16 1it.refs.

CAMERON, D.R., C.G.KOWALENK0 and K.C.IVARSON / Nitrogen and chloride leaching in a sandy field plot. Soil Sci. 126(1978)3:174-180. 15 1it.refs.

MITCHELL, W.H., A.L.MOREHART, L.J.CONTNOIR et al. / Effect of soil mixtures and irrigation methods on leaching of N in golf greens. Agronomy Journal 70(1978)1:29-35. 15 lit-refs.

KOSMALA, P. / Lysimeterversuche zu Fragen der Nahrstoffauswaschung und Salzbilanz in Tunesien. Bonn, 1977. 112 pp. 50 1it.refs.

BERI, V., S.S.BRAR, G.S.SEKHON et al. / Extent of urea leaching in soil and its biochemical-control. J. of the Indian Soc. of Soil Sci. 26(1978)2:116-124. 10 1it.refs.

SINGH, B . , D.S.RANA and G.S.SEKHON / Some measures of reducing leaching loss of nitrates beyond potential rooting zone. IV. Intercropping. Plant and Soil 49(1978)3:633-639. 4 1it.refs.

SINGH, B. and G.S.SEKHON / Leaching of nitrate in calcareous soils as influenced by its adsorption on calcium carbonate. Geoderma 20(1978)3/4:271-279. 13 1it.refs.

ADDISCOTT, T.M., D.A.ROSE and J.BOLTON / Chloride leaching in the Roth: sted drain gauges. Influence of rainfall patterns and soil structur6 J. of Soil Sci. 29(1978)3:305-314. 10 1it.refs.

58

I

LAMOROUX, M . , J.C.LOYER, M.PINTA et al. / Expérimentation sur l'entrahe- ment des produits dissous et en suspension dans un matgriel fersialli- t ique. Science du S o l (1978)1:55-71. 6 1it.refs. .

GRABNER, E. / Auslaugung von MÜllschlacken. I: Thermodynamik und Erosion. ISWA Inform. 22(1977)7-16. 16 1it.refs.

SINGH, B. and G.S.SEKHON / Leaching of potassium.in illitic soil profiles as influenced by long-term application of inorganic fertilizers. J. of Agric.Sci. 91(1978)1:237-240. I O 1it.refs.

NATHWANI, J . S . and C.R.PHILLIPS 1 Rates of leaching of radium from contamined soils. An experimental investigation of radium bearing soils from Port Hope, Ontario. Water, Air and Soil Pollution 9(1978)4:453-465. 6 1it.refs.

KHANNA, P.K. and F.BEESE / The behaviour of sulfate on salt input in podzolic brown earth.. Soil Sci; 125(1978)1:16-22. 17 lit.refs.

SOIL DENSITY

NEGOVELOV, S.F . and V.G.UNGURYAN / Determination of changes in soil density after deep plowing. Soviet Soil Sci. 9(1977)1:109'113. 5 1it.refs.

SMITH, L.A. and W.T.DUMAS / A recording soil penetrometer. Transactions of ASAE (1978)1:12-14, 19. 7 1it.refs.

VINOPAL, R.J. and A.H.COOGAN / Effect of particle shape on the packing of carbonate sands and gravels. J. of Sedimentary Petrology 48(1978)1:7-24. 24 1it.refs.

HARTGE, K.H., A.ELLIES, J.NISSEN et al. / Anisotropy of penetration , resistance in four soil profiles in Chile.

Geoderma 20( 1978) 1 :53-61. 9 1it.refs.

59

WERNER, D. Morphologische Untersuchungen zur Stabilitat von Boden- lockerstrukturen. Archiv f.Acker- u.Pf.lanzenbau u.Bodenkunde 22(1978)8:483-494. I O 1it.refs.

PARKER, J . C . , D.F.AMOS and D.L.KASTER 1 An evaluation of several methods of estimating soil volume change. Soil Sci. Society of America Journal 41(1977)6:1059-1064. 38 1it.refs..

SOIL COMPACTION

HEGARTY, T.W., and S.M.ROYLE 1 Combined effects of moisture content prior to compaction, compactive effort and rainfall quantity on soil crust s treng th . J. of Soil Sci. 29(1978)2:167-173. 18 1it.refs.

MILES, J.A. Soil compaction produced by logging and residue treatment. Transactions ASAE 21 (1978)l :60-69. I 2 1it.refs.

NJOS, A. 1 Effects of tractor traffic and liming on yields and soil physi- cal properties of a silty clay loam soil. Meldinger fra Norges Landbrukshbgskole 57(1978)24:26 pp.' 53 1it.refs.

KOOLEN, A . J . The influence of a s o i l compaction process on subsequent soil tillage processes. A new research method. Netherlands J . of Agric.Sci.. 26(1978)2:191-199. 7 1it.refs.

VOORHEES, M.L. and P.N.WALKER / Tractionability as a function of soil moisture. Transactions ASAE 20(1977)5:806-809. 4 1it.refs.

SPARROW, S.D., F.J.WOODING and E.H.WHITTING / Effects of off-road vehicle traffic on soils and vegetation in the Denali Highway region of Alaska. J. of Soil and Water Conservation 33(1978)1:20-27. 17 1it.refs. Map.

KOGURE, K. and T.KUDO / Shearing properties of sand under a repeated loading representing the ground pressure distribution of a tracked vehicle. J. of Terramechanics 14(1977)4:237-248. 12 1it.refs.

VOORHEES, W.B., C.G.SENST and W.W.NELSON / Compaction and soil structure modification by wheel traffic in the Northern Corn Belt. Soil S c i . Society of America Journal 42(1978)2:344-349.

* 23 1it.refs.

60

RAGHAVAN, G.S.V. and E.McKYES / Statistical models for predicting compaction generated by off-road vehicular traffic in different soil types. J. of Terramechanics 15(1978)1:1-14. 6 1it.refs.

YONG, R.N. and A.F.YOUSSEF / Application of vane-cone tests on soil for determination of trafficability. Montreal, McGill Univ. 1978. 30 pp. Geotechnical Research Centre, Soil Mechanics Series 39. 7 lit.refs.

YONG, R.N., P.BOONSINUK and E.A.FATTAH / Prediction of tyre performance on soft soils relative to carcass stiffness and contact areas. Montreal, McGill Univ. 1978. 33 pp. 9 1it.refs.

SWELLING AND SHRINKING

ROSS, G.J. / Relationships of specific surface area and clay content to shrink-swell potenti.al.of soils having different clay mineralogical compositions. Canadian J. of Soil Sci. 58(1978)2:159-166. 19 1it.refs.

ODOM, J.W. and P.F.LOW / Relation between swelling, surface area and b dimension of Na-montmorillonites. Clays and Clay Minerals 26(1978)5:345-351. 25 lit.refs.

REEVE, M.J. and D.G.M.HALL / Shrinkage in clayey subsoils of contrasting structure. J . o f Soil Sci. 29(1978)3:315-323. 19 1it.refs.

GIRALDEZ, J.V. / Moisture profiles during steady vertical flows in swelling soils. Water Res. Research 14(1978)2:314-318. 21 1it.refs.

TALSMA, T. / A note on the shrinkage behaviour of a clay paste under various loads. Austral. J. of Soil Res. 15(1977)3:275-277. 6 1it.refs.

GUIDI, G., M.PAGLIA1 and G.Petruzzelli / Quantitative size evaluation of cracks and clods in artificially dried soil samples. Geoderma 20(1978)2:105-113. 8 1it.refs.

61

SOIL STRUCTURE

WICHTMANN, H. / Porengrössenverteilung und Bodenfruchtbarkeit. Ein Beitrag zur physikalischen Kennzeichnung der BÖden auf Bodenkarten. Z. f . Pf lanzenernahrung u. Bodenkunde 14 1 ( 1978)4 : 429-442. Bibl.: pp.440-442.

TISDALL, J.M., B.COCKROFT and N.C.UREN / The stability of s o i l aggregates as affected by organic materials, microbial activity and physical disruption. Austral. J. of Soil Res. 16(1978)1:9-17.

. 12 1it.refs.

LAWRENCE, G.P. / Stability of soil pores during mercury intrusion porosimetry. J . of Soil Sci. 29(1978)3:299-304. 13 1it.refs.

MIKHAIL, E.H. and G.P.BRINER / Routine particle size analysis of soils using sodium hypochlorite and ultrasonic dispersion. Australian J . of Soil Res. 16(1978)2:241-244. 15 1it.refs.

(The) MEASUREMENT of soil structure and porosity (1970-1962). Annot.Bib1.1517. Com.Bureau of Soils, Harpenden. 21 pp. 88 1it.refs.

SCHWEIKLE, V . / Die Porung in schrumpfenden BÖden. Mitt. Dtsch. Bodenkundl. Gesellschaft 26(1978)229-234. 9 1it.refs.

SKAGGS, R.W., L.G.WELLS and S.R.GHATE / Predicted and measured drainable porosities for field soils. Transactions ASAE 21(1978)3:522-528. 12 1it.refs.

SCHULTE-KARRING, H . / Die Strukturerhaltung von tiefgelockerten BÖden. ,'

Berichte Über Landwirtschaft 55(1977)4:612-619. 16 1it.refs.

COUGHLAN, K.J. and W.E.FOX / Measurement of aggregate size. Australian J. of Soil Res. 15(1977)3:211-219. 8 1it.refs.

EPSHTEYN, S.M. and 0.A.AGAFONOV / Effect of hydrous ammonia and polymers on the water stability of soil aggregates. Soviet Soil Sci. 9(1977)3:355-360. 15 1it.refs.

MUPRHY, C.P. and C.F.B.BANFIELD / Pore space variability in a sub-surface horizon of two soils. J . of Soil Sci. 29(1978)2:156-166. 30 1it.refs.

62