Soil tilth-the desired soil structural state obtained through proper soil fragmentation and reorientation processes

Soil and Tillage Research

Volumn 43, Issue 1-2, 1997, Pages 7-40

  Hadas, A ^a  

^a VOLCANI CENTER   (Israel)

Author keywords

Crop stress factors; Root systems; Soil fragmentation; Soil structure; Structure stability

Indexed keywords

CROP REQUIREMENTS; CROP YIELD; FRAGMENTATION; SOIL STRUCTURE; SOIL TILTH; TILLAGE; TILLAGE PRACTICES; TILTH;

EID: 0031473295     PISSN: 01671987     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0167-1987(97)00033-0     Document Type: Conference Paper

References (205)

1. Abdalla, A.M., Hettiaratchi, D.R.P., Reece, A.R., 1969. The mechanics of root growth in granular media. J. Agric. Eng. Res. 14, 236-248.
2. Addiscot, T.M., 1993. Simulation modelling and soil behavior. Geoderma 60, 15-40.
3. Addiscot, T.M., Dexter, A.R., 1994. Tillage and crop residue management effects on loss of chemicals from the soil. Soil Tillage Res. 30, 125-168.
4. Allmaras, R.R., Nelson, W.W., 1971. Corn (Zea mays, L.) root configuration as influenced by some row, interrow variants of tillage and straw mulch managements. Soil Sci. Soc. Am. Proc. 35, 974-980.
5. Allmaras, R.R., Nelson, W.W., 1973. Corn root configuration response to soil temperature and matric suction. Agron. J. 65, 725-730.
6. Allmaras, R.R., Gupta, S.C., Swan, J.B., Nelson, W.W., 1986. Hydrothermal effects on corn root development in a mollisol. In: Trans. 13th Int. Congr. Soil Sci. Soc., Vol. 5. Hannover, Germany, pp. 3-19.
7. Amemiya, M., 1965. The influence of aggregate size on soil moisture content-capillary conductivity relations. Soil Sci. Soc. Am. Proc. 29, 744-748.
8. Anderson, D.G., 1995. Fracture Mechanics - Fundamentals and Applications, 2nd edn. CRC Press, Boca Raton, FL, p. 793.
9. Anderson, A.M., McBratney, A.B., Fitzpatric, E.A., 1996. Soil mass, surface and spectral dimensions estimates from thin sections photographs. Soil Sci. Soc. Am. J. 60, 962-969.
10. Arya, L.M., Black, G.R., Farrell, D.A., 1975. A field study of water depletion patterns in the presence of growing soybean roots: III. Rooting characteristics and root extraction of soil water. Soil Sci. Soc. Am. Proc. 39, 437-442.
11. Baker, J.M., Wreith, J.M., Dalton, F.N., 1992. Root function in water transport. Adv. Soil Sci. 19, 27-72.
12. Ball, B.C., Franklin, M.F., Soane, B.D., 1994. Lessons from a 26-year tillage experiment on cereals. In: Proc. 13th Int. ISTRO Conf., Vol. 2. Aalborg, Denmark, pp. 755-763.
13. Bar-Joseph, B., 1991. Root extraction and their environmental effects. In: Waizel, Y., Eshel, A., Kafkafi, U. (Eds.), Plant Roots: the Hidden Half. Marcel Dekker Inc. New York, NY, pp. 529-557.
14. Barley, K.P., Greacen, E.L., 1967. Mechanical resistance as a soil factor influencing the growth of roots and underground shoots. Adv. Agron. 19, 1-43.
15. Bathke, G.R., Cassel, W.L., Hargrove, W.L., Porter, P.M., 1992. Modification of soil physical properties and root growth. Soil Sci. 154, 316-329.
16. Bengough, A.G., Mullin, C.E., 1991. Penetrometer resistance, root penetration resistance and root elongation rates in two sandy loamy soils. Plant Soil 131, 59-66.
17. Blackwell, P.S., Green, T.W., Olssen, K.A., 1987. The size and horizon of origin of fragments produced by deep ripping texture contrast soils. Aust. J. Soil Res. 25, 211-222.
18. Boef-Tremblay, V., Plantrureux, S., Guchett, A., 1995. Influence of mechanical impedance on root exudation of maize seedlings in two development stages. Plant Soil 172, 279-287.
19. Bolt, G.H., Koening, F.F.R., 1972. Physical and chemical aspects of the stability of soil aggregates. Meded. Fac. Landbau. Rijkuniv. Ghent. 37, 955-973.
20. Bowen, H.D., 1981. Alleviating mechanical impedance. In: Arkin, G.F., Taylor, H.M. (Eds.), Modifying the Root Environment to Reduce Crop Stresses. Am. Soc. Agron. Eng. Monograph 4, ASAE, St. Joseph, MI, pp. 21-57.
21. Box, J.E., 1991. The effects of water logging on rooting of soft red winter wheat. In: McMichael, B.L., Pearson, H.P. (Eds.), Plant Roots and their Environment. Elsevier, Amsterdam, The Netherlands, pp. 418-430.
22. Bradforfd, J.M., Huang, C., 1992. Mechanics of crust formation: physical components. In: Summner, M.E., Stewart, B.A. (Eds.), Soil Crusting: Chemical and Physical Processes. Lewis Pub., Boca Raton, FL, pp. 55-72.
23. Braunack, M.V., Dexter, A.R., 1989. Soil aggregation in the seedbed - a review: II. Effect of aggregate sizes on plant growth. Soil Tillage Res. 14, 281-298.
24. Braunack, M.V., McPhee, J.E., 1991. The effect of the initial soil water content and tillage implement on seedbed formation. Soil Tillage Res. 20, 5-17.
25. Braunack, M.V., Hewitt, J.S., Dexter, A.D., 1979. Brittle fracture of soil aggregates and the compaction of aggregated beds. J. Soil Sci. 30, 653-667.
26. Bruckler, L., Lafolie, F., Tardieu, F., 1991. Modelling root water potential and soil-root water transport: II. Field comparison. Soil Sci. Soc. Am. J. 55, 1213-1220.
27. Caldwell, M.M., 1987. Competition between root systems in natural communities. In: Gregory, J.P., Lake, J.V., Rose, D.A. (Eds.), Root Development and Function. Cambridge Univ. Press, London, UK, pp. 167-185.
28. Campbell, G.S., 1991. Simulation of water uptake by plant roots. In: Hanks, J.R., Ritchie, J.T. (Eds.), Modelling Plant and Soil Systems. Am. Soc. Agron. Monograph 31. Madison, WI, pp. 273-286.
29. Campbell, R.B., Busscher, W.J., Beale, O.W., Sojka, R.E., 1988. Soil profile modification and cotton production. In: Proc. Beltwide Production Res. Conf. Memphis, TN, USA, pp. 505-509.
30. Cannell, R.Q., Hawes, J.D., 1994. Trends in tillage practices in relation to sustainable crop production with special reference to temperate climate. Soil Tillage Res. 30, 245-282.
31. Chancellor, W.J., 1976. Compaction of soil by agricultural equipment. Univ. of California Ext. Bull. 1881, Davis, CA, p. 53.
32. Colvin, T.S., Erbach, D.C., Buchle, W.F., Cruse, R.M., 1984. Tillage index based on created soil conditions. Trans. Am. Soc. Ag. Eng. 27, 370-371.
33. Cowan, I.R., 1965. Transport of water in soil-plant-atmosphere system. J. Appl. Ecol. 2, 221-239.
34. Cowan, I.R., Milthorp, F.L., 1968. Plant factors influencing the water status of plant tissues. In: Kozlowski, K.K. (Ed.), Water Deficit and Plant Growth, Vol 1. Academic Press, New York, NY, pp. 137-193.
35. Davidovski, J.B., Koolen, A.J., 1986. Changes in soil water suction, conductivity and dry strength during deformation of wet undisturbed samples. Soil Tillage Res. 9, 169-180.
36. de Freitas, P.L., Zobel, R.W., Snyder, V.A., 1996. A method for studying the effect of soil aggregates size and density. Soil Sci. Soc. Am. J. 60, 258-260.
37. de Vries, D.A., 1963. Thermal properties of soils. In: van Wijk, W.R. (Ed.), Physics of Plant Environment. North-Holland, Amsterdam, The Netherlands, pp. 210-236.
38. de Willingen, P., van Noordwijk, M., 1987. Root, Plant Production and Nutrients Use Efficiency. Ph. Dissertation Agric. Univ. Wageningen, The Netherlands, p. 287.
39. de Wit, C.T., 1953. A physical theory on placement of fertilizers. Versl. Landbouw. Onderz. 59 (4), 71.
40. Dexter, A.R., 1977. Effect of rainfall on the surface microrelief of tilled soil. J. Terramech. 14, 11-22.
41. Dexter, A.R., 1978. A stochastic model for the growth of roots in tilled soils. J. Soil Sci. 29, 102-116.
42. Dexter, A.R., 1979. Prediction of soil structure produced by tillage. J. Terramech. 16, 117-127.
43. Dexter, A.R., 1987. Mechanics of root growth. Plant Soil 98, 303-312.
44. Dexter, A.R., 1988a. Soil amelioration by natural processes. Proc. Workshop: Soil Management 88. Darling Downs, Inst. of Adv. Educ., Toowoomba, Queensland, Australia, pp. 433-448.
45. Dexter, A.R., 1988b. Advances in characterization of soil structure. Soil Tillage Res. 11, 199-239.
46. Dexter, A.R., Woodhouse, T., 1985. Soil mechanics in relation to tillage, implements, and root penetration in lowland soils. In: Soil Physics and Rice. Int. Inst. Rice Res., Los-Baños, Philippines, pp. 261-282.
47. Dexter et al., 1985.
48. Drew, M.C., 1992. Soil aeration and plant metabolism. Soil Sci. 154, 250-268.
49. Eck, H.V., 1986. Effects of profile modification and irrigation on yield and water use of wheat. Soil Sci. Soc. Am. J. 50, 724-729.
50. Eck, H.V., Unger, P.W., 1985. Soil profile modification for increasing crop production. Adv. Agron. 1, 65-100.
51. Eck, H.V., Winter, S.R., 1992. Soil profile modification effects on corn and sugar beet grown with limited water. Soil Sci. Soc. Am. J. 56, 1298-1304.
52. Ehlers, W., 1975. Rapid determination of undisturbed hydraulic conductivity in tilled and untilled loess soil. Soil Sci. 119, 242-249.
53. Ehlers, W., Kopke, U., Hesse, F., Bohm, W., 1983. Penetration resistance and root growth of oats in tilled and untilled loess soil. Soil Tillage Res. 3, 261-275.
54. Ellis, F.B., Elliot, J.B., Barnes, B.T., Howse, K.R., 1977. Comparison of direct drilling reduced cultivation and ploughing on the growth of cereals: II. Spring barley on a sandy loam soil, soil physical conditions and root growth. J. Agric. Sci. 89, 631-645.
55. Fitter, A.H., 1991a. Characteristics and functions of root systems. In: Waizel, Y., Eshel, A., Kafkafi, U. (Eds.), Plant Roots: the Hidden Half. Marcel Dekker, New York, NY, pp. 3-25.
56. Fitter, A.H., 1991b. The ecological significance of root system architecture: an economic approach. In: Atkinson, D. (Ed.), Plant Root Growth - an Ecological Prospective. Blackwell, London, UK, pp. 229-243.
57. Ganzer, C.J., Black, G.R., 1978. Physical characteristics of le Sour clay soil following no-till and conventional tillage. Agron. J. 70, 853-857.
58. Gardner, W.R., 1960. Dynamic aspects of water availability to plants. Soil Sci. 89, 63-73.
59. Gardner, W.R., 1968. Availability and measurement of soil water. In: Kozlowski, T.T. (Ed.), Water Deficits and Plant Growth. Academic Press, New York, NY, pp. 107-135.
60. Gardner, W.R., Ehlig, C.F., 1962. Impedance to water movement in soil and plant. Science 138, 522-523.
61. Glancey, J.L., Upadhyaya, S.K., Chancellor, W.J. 1988. Development of an instrumented tine for use in tillage studies. In: Tillage and Traffic in Crop Production, Proc. 11th Conf. of ISTRO, Vol. 2. Edinburgh, Scotland, pp. 481-486.
62. Glancey, J.L., Upadhyaya, S.K., Chancellor, W.J., Rumse, J.W., 1996. Prediction of agricultural implements draft using an instrumented analog tillage tool. Soil Tillage Res. 37, 47-65.
63. Glinski, J., Lipiec, J., 1990. Soil Physical Conditions and Plant Roots. CRC Press, Boca Raton, FL, pp. 250.
64. Glinski, J., Stepniewski, W., 1985. Soil Aeration and its Role for Plants. CRC Press, Boca Raton, FL, pp. 212.
65. Godwin, R., Spoor, G., 1977. Soil failure with narrow tines. J. Agric. Eng. Res. 22, 213-228.
66. Goyal, M.R., Drew, L.D., Nelson, G.L., Logan, T.J., 1980a. Critical time for soybeen seedling emergence force. Trans. Am. Soc. Ag. Eng. 23, 831-835.
67. Goyal, M.R., Drew, L.D., Nelson, G.L., Logan, T.J., 1980b. Soybeen seedling emergence force. Trans. Am. Soc. Ag. Eng. 23, 836-839.
68. Goyal, M.R., Nelson, G.L., Drew, L.D., 1981. Moisture and soybeen seedling emergence. Trans. Am. Soc. Ag. Eng. 24, 1432-1435.
69. Goyal, M.R., Drew, L.D., Carpenter, T.G., 1982. Analytical prediction of seedling emergence. Trans. Am. Soc. Ag. Eng. 25, 38-41.
70. Grant, C.D., Kay, B.D., Groenevelt, P.H., Kid, G.E., Thurtell, G.W., 1985. Spectral analysis of micropenetrometer data to characterize soil structure. Can. J. Soil Sci. 65, 789-804.
71. Greacen, E.L., 1986. Root response to soil mechanical properties. In: Proc. 13th Congr. Int. Soil Sci. Soc., Vol 5. Hamburg, Germany, pp. 20-47.
72. Greenland, D.J., 1968. Effect of oxygen distribution in soil on plant growth. In: Whittington, W.J. (Ed.), Root Growth. Butterworth, London, UK, pp. 202-221.
73. Gregory, P.J., 1987. Development and growth of root systems in plant communities. In: Gregory, P.J., Lake, J.V., Rose, D.A. (Eds.), Root Development and Functions. Cambridge Univ. Press, London, UK, pp. 147-166.
74. Gupta, S.C., Hadas, A., Voorhees, W.B., Wolf, D., Larson, W.E., Sharma, P.P., 1990. Development of guidelines on the susceptibility of soils to excessive compaction. Final report submitted to the Binational Agricultural Research and Development Fund (BARD). Project No. US-973-85, BARD HQ. Bet Dagan, Israel, p. 294.
75. Hadas, A., 1974. Effect of extrenal evaporative conditions on drying of soil. In: 10th Int. Soil Sci. Soc., Vol. 1. Moscow, USSR, pp. 136-142.
76. Hadas, A., 1977. Evaluation of theoretically predicted thermal conductivities of soils under field and laboratory conditions. Soil Sci. Soc. Am. J. 41, 460-466.
77. Hadas, A., 1987a. Long term tillage practice effects on soil aggregation modes and strength. Soil Sci. Soc. Am. J. 51, 181-186.
78. Hadas, A., 1987b. Dependence of true surface energy of soils on air entry pore size and chemical constituents. Soil Sci. Soc. Am. J. 51, 186-191.
79. Hadas, A., Frenkel, H., 1982. Infitration as affected by long term use of sodic-saline water for irrigation. Soil Sci. Soc. Am. J. 46, 524-530.
80. Hadas, A., Lennard, G., 1988. Dependence of tensile strength of soil aggregates on soil constituents, density and load history. J. Soil Sci. 39, 577-586.
81. Hadas, A., Russo, D., 1984b. Water uptake by seeds as affected by water stress, capillary conductivity and seed soil contact: II. Analysis of experimental results. Agron. J. 65, 647-652.
82. Hadas, A., Shmulewich, I., 1990. Spectral analysis of cone penetrometer data for detecting spatial arrangement of soil clods. Soil Tillage Res. 18, 47-62.
83. Hadas and Stibbe, 1976.
84. Hadas, A., Stibbe, E., 1977. Soil crusting and emergence of wheat seedlings. Agron. J. 69, 547-550.
85. Hadas, A., Wolf, D., 1983. Energy efficiency in tilling dry clod forming soils. Soil Tillage Res. 3, 47-59.
86. Hadas, A., Wolf, D., 1984. Soil aggregate and clod strength dependence on clod size, cultivation and stress load rate. Soil Sci. Soc. Am. J. 48, 1157-1164.
87. Hadas, A., Wolf, D., Meirson, I., 1978. Tillage implements - soil structural relationships and their effects on crop stands. Soil Sci. Soc. Am. J. 42, 632-637.
88. Hadas, A., Wolf, D., Stibbe, E., 1980. Tillage practices and crop response analysis of agro-ecosystems. Agro-Ecosystems 6, 235-248.
89. Hadas, A., Wolf, D., Rawitz, E., 1983. Zoning soil compaction and cotton stand under controlled traffic conditions. Paper No. 83-1042, presented at the Am. Soc. Agr. Eng. Bozeman, MT, p. 21.
90. Hadas, A., Wolf, D., Rawitz, E., 1985. Residual compaction effects on cotton stand and yields. Trans. Am. Soc. Ag. Eng. 28, 691-696.
91. Hadas, A., Larson, W.E., Allmaras, R.R., 1988. Advances in modelling machine-soil-plant interactions. Soil Tillage Res. 11, 349-372.
92. Hadas, A., Shmulewich, I., Hadas, O., Wolf, D., 1990. Forage wheat yields as affected by compaction and conventional vs. wide frame tractor traffic patterns. Trans. Am. Soc. Ag. Eng. 33, 79-85.
93. Hallett, P.D., Dexter, A.R., Seville, J.P.K., 1995. Identification of pre existing cracks on soil fracture surfaces using dye. Soil Tillage Res. 33, 163-184.
94. Hamblin, A.P., 1985. The influence of soil structure on water movement, crop root growth and water uptake. Adv. Agron. 38, 95-158.
95. Hanks, R.J., 1983. Yield and water use relationships. In: Taylor, H.M., Jordan, W.R., Sinclair, T.R. (Eds.), Limitation to Efficient Water Use Crop Production. Am. Soc. Agron. Madison, WI, pp. 393-411.
96. Hanks, R.J., 1991. Soil evaporation and transpiration. In: Hanks, R.J., Ritchie, J.T. (Eds.), Modelling Plant and Soil Systems. Am. Soc. Agron. Monograph 31. Madison, WI, pp. 245-272.
97. Hanks, R.J., Ritchie, T.J. (Eds.), 1991. Modelling Plant and Soil Systems. Am. Soc. Agron. Monograph 31. Madison, WI, p. 545.
98. Harr, M., 1977. Mechanics of particulated media - a Probabilistic Approach. McGraw-Hill, New York, p. 437.
99. Herkelrath, W.N., Miller, E.E., Gardner, W.R., 1977a. Water uptake by plants: I. Divided root experiment. Soil Sci. Soc. Am. J. 41, 1033-1038.
100. Herkelrath, W.N., Miller, E.E., Gardner, W.R., 1977b. Water uptake by plants: II. Root contact model. Soil Sci. Soc. Am. J. 41, 1039-1043.
101. Hettiaratchi, D.R.P., 1988. Theoretical soil mechanics in soil-tool interaction. Soil Tillage Res. 11, 325-347.
102. Hettiaratchi, D.R.P., 1990. Soil compaction and plant root growth. Phil. Trans. R. Soc. London B 329, 343-355.
103. Hewitt, J.S., Dexter, A.R., 1978. An improved model of root growth in structured soil. Plant Soil. 52, 325-343.
104. Hewitt, J.S., Dexter, A.R., 1984. The behavior of roots encountering cracks in soil. Development of a predictive model. Plant and Soil 77, 11-28.
105. Hillel, D., 1982. Introduction to Soil Physics. Academic Press, Orlando, FL, p. 413.
106. Hoffman, G.J., 1981. Alleviating salinity stress. In: Arkin, G.F., Taylor, H.M. (Eds.), Modifying the Root Environment to Reduce Crop Stress. Am. Soc. Agron. Eng. Monograph 4. St. Joseph, MI, pp. 305-343.
107. Hoogenboom, G., Huck, M.G., 1986. ROOTSIMU V4.0 - a dynamic simulation of root growth, water uptake and biomass partitioning in soil-plant-atmosphere continuum: update and documentation. Alabama Agron. Exp. Station, Agronomy and Soil Dept. Ser. 109, p. 108.
108. Horn, R., 1995. Stress transmission ad recompaction in tilled and segmentally disturbed subsoils under trafficking. In: Jayawardane, N.S., Stewart, B.A. (Eds.), Subsoil Management Techniques. Lewis Pub., Boca Raton, FL, pp. 187-210.
109. Horn, R., Taubner, H., Wuttke, M., Baumgartl, T., 1994. Soil physical properties related to soil structure. Soil Tillage Res. 30, 187-216.
110. Huck, M.G., Hillel, D., 1983. A model of root growth and water uptake accounting for photosynthesis, respiration and soil hydraulic properties. Adv. Irrigation 2, 273-333.
111. Jackson, M.B., 1994. Root-shoot communication: I. Flooded plants - involvement of abscisic acid, ethylene and 1-aminocyclopropane-1-carboxyl acid. Agron. J. 86, 775-787.
112. Jakobsen, B.F., Dexter, A.R., 1987. Effect of soil structure on wheat root growth, water uptake and grain yield - a computer simulation model. Soil Tillage Res. 10, 331-345.
113. Jalota, S.K., Prihar, S.S., 1990. Bare soil evaporation in relation to tillage. Adv. Soil Sci. 12, 187-216.
114. Jayawardane, N.S., Blackwell, J., Kirkhof, G., Muirhead, W.M., 1995. Sloting - a deep tillage technique for ameliorating sodic, acid and other degraded subsoils and for land treatment of waste. In: Jayawardane, N.S., Stewart, B.A. (Eds.), Subsoil Management Techniques. Lewis Pub., Boca Raton, FL, pp. 109-145.
115. Jones, C.A., Bland, W.L., Ritchie, J.T., Williams, J.R., 1991. Simulation of root growth. In: Hanks, R.J., Ritchie, T.J. (Eds.), Modelling Plant and Soil Systems. Agron. Monograph 31, Am. Soc. Agron. Madison, WI, pp. 91-123.
116. Jordan, W.R., Miller, F.R., 1980. Genetic variability in sorghum root systems, implication, for drought tolerance. In: Turner, N.C., Kramer, J.P. (Eds.), Adaptation of Plants to Water and High Temperature Stress. Wiley, New York, NY, pp. 383-399.
117. Karlan, D.L., Erbach, D.C., Kaspar, T.C., Colvin, T.C., Bery, E.B., Timmons, D.R., 1990. Soil tilth: a review of past perceptions and future needs. Soil Sci. Soc. Am. J. 54, 153-161.
118. Kaspar, T.C., Blant, W.L., 1992. Soil temperature and root growth. Soil Sci. 154, 290-367.
119. Kay, B.D., 1992. Rates of change of soil structure under different cropping systems. Adv. Soil Sci. 12, 1-52.
120. Keller, J., 1970. Sprinkler intensity and soil tilth. Trans. Am. Soc. Ag. Eng. 13, 118-125.
121. Kim, D.J., Vereecken, H., Feyen, J., 1993. Comparison of multidisciplinary approach and unification of concepts on the movement of water and soil in deformable porous media. Soil Sci. 156, 141-148.
122. Kleinfelder, D., Swanson, D., Norris, G., Carry, W., 1992. Unconfined compressive strength of some stream soils with herbaceous roots. Soil Sci. Soc. Am. J. 56, 1920-1925.
123. Klepper, B., 1992. Development and growth of crop root system. Adv. Soil Sci. 19, 1-25.
124. Klute, A., 1982. Tillage effects on the hydraulic properties of soil: a review. In: Unger, P.W., van Doren, D.M., Whisler, F.D., Skidmore, E.L. (Eds.), Predicting Tillage Effects on Soil Physical Properties and Processes. Am. Soc. Agron. Sp. Pub. 44. Madison, WI, pp. 29-43.
125. Koolen, A., 1977. Soil loosening processes in tillage - analysis, system and predictability. Meded. Landbouwhoghsch. 77 (17) 1-158. Wageningen.
126. Kuipers, H., 1984. The challenge of soil cultivations and soil water problems. J. Agric. Eng. Res. 29, 177-190.
127. Lachno, D., Harrison, R., Andus, J.C., 1982. The effects of mechanized impedances to growth on the level of ABA and IAA in root tips of Zea mays, L. J. Exp. Bot. 33, 943-951.
128. Lafolie, F., Bruckler, L., Tardieu, F., 1991. Modelling root water potential and soil root transport: I. Model presentation. Soil Sci. Soc. Am. J. 55, 1203-1212.
129. Lal, R., 1991. Tillage and agricultural sustainability. Soil Tillage Res. 20, 133-145.
130. Lodgson, S.D., Allmaras, R.R., 1991. Maize and soybean root clustering as indicated by root mapping. Plant Soil 131, 169-176.
131. Lodgson, S.D., Renaeu, R.B., Parker, J.C., 1987. Corn seedling root growth as influenced by soil physical properties. Agron. J. 79, 221-224.
132. Mahabubi, A.A., Lal, R., Faussey, N.R., 1993. Twenty eight years of tillage effects on two soils in Ohio. Soil Sci. Soc. Am. J. 57, 506-512.
133. Malsted, S.W., 1954. New concepts of management of corn belt soils. Adv. Agron. 6, 121-142.
134. Marschner, H., 1991. Root induced changes in the availability of micro nutrients in the rhizosphere. In: Waizel, Y., Eshel, Y.A., Kafkaki, U. (Eds.), Plant Roots: the Hidden Half. Marcel Dekker, New York, NY, pp. 503-528.
135. Marshal, T.J., Holmes, J.M., 1979. Soil Physics. Cambridge Univ. Press, London, UK, p. 345.
136. Mass, E.V., Huffman, G.F., 1977. Crop salt tolerance - current assessment. J. Irrigation Drainage Div. Am. Soc. Civil Eng. 103 (IR3), 115-134.
137. Mayers, W.S., Barrs, H.D., 1991. Roots in irrigated clay soil: measurement techniques and responses to root zone conditions. Irrigation Sci. 12, 125-134.
138. McKeys, E., 1985. Soil Cutting and Tillage. Elsevier, Amsterdam, The Netherlands, p. 217.
139. Merrill, S.D., Black, A.L., Bauer, A., 1996. Conservation tillage affects root growth of dryland spring wheat under drought. Soil Sci. Soc. Am. J. 60, 575-583.
140. Misra, R.K., Dexter, A.R., Alston, A.M., 1986. Penetration of aggregates of finite size: II. Plant roots. Plant Soil. 94, 59-85.
141. Mock, J.J., Erbach, D.C., 1977. Influence of conservation - tillage on growth and productivity of corn. Agron. J. 69, 337-340.
142. Morin, J., Byniamini, Y., 1977. Rainfall infiltration into bare soil. Water Resources Res. 13, 813-817.
143. Morin, J., van Winkler, J., 1996. The effect of raindrop impact and sheet erosion on infiltration rate and crust formation. Soil Sci. Soc. Am. J. 60, 1223-1227.
144. Mualem, Y., Assulin, S., 1992. Flow processes in sealing soils: conceptions and solutions. In: Summner, M.E., Stewart, B.A. (Eds.), Soil Crusting: Chemical and Physical Processes. Lewis Pub., Boca Raton, FL, pp. 123-149.
145. Nicoullaud, B., King, D., Tardieu, F., 1994. Vertical distribution of maize roots in relation to permanent soil characteristics. Plant Soil 159, 245-254.
146. Oades, J.M., Waters, A.G., 1991. Aggregate hierarchy in soils. Aust. J. Soil Sci. 29, 815-828.
147. Olsson, K.A., Cockroft, B., Rangaswamy, P., 1995. Improving and managing subsoil structure for high productivity from temperate crops on beds. In: Jayawardane, N.S., Stewart, B.A. (Eds.), Subsoil Management Techniques. Lewis Pub., Boca Raton, FL, pp. 35-65.
148. Paris, Q., 1992. The return of von Liebig's Law of the Minimum. Agron. J. 84, 1040-1046.
149. Payne, P.C.J., 1956. The relationships between the mechanical properties of soil and the performance of simple cultivation implements. J. Agric. Eng. Res. 1, 23-50.
150. Pellerin, S., Tardieu, F., Tricot, F., 1991. Modelling root systems architecture: experimental data on maize root systems geometry. In: McMicheal, B.L., Prson, H. (Eds.), Plant Root and their Environment. Dev. Agric. Manage. Forest Ecol. Elsevier, Amsterdam, The Netherlands, 24, pp. 620-627.
151. Perdok, U.D., Kouwenhoven, J.K., 1994. Soil-tool interaction and field performance of implements. Soil Tillage Res. 30, 283-326.
152. Perfect, E., Kay, B.D., 1995a. Brittle fracture of fractel cubic aggregates. Soil Sci. Am. J. 59, 969-974.
153. Perfect, E., Kay, B.D., 1995b. Application of fractals in soil and tillage research: a review. Soil Tillage Res. 36, 1-20.
154. Phillip, J.R., 1967. Hydrostatic and hydrodynamics in swelling soils. Water Resources Res. 5, 1070-1077.
155. Pidgeon, J.D., Soane, B.D., 1977. Effects of tillage and direct drilling on soil properties during the growth season in a long term barley monoculture system. J. Agric. Sci. 88, 431-442.
156. Pikul, J.L., Ramig, R.C., Wilkins, D.E., 1993. Soil properties and crop yields among four tillage systems in a wheat pea rotation. Soil Tillage Res. 26, 151-162.
157. Rieu, M., Sposito, G., 1991a. Fractal fragmentation, soil porosity and soil water properties: I. Theory. Soil Sci. Soc. Am. J. 55, 1231-1238.
158. Rieu, M., Sposito, G., 1991b. Fractal fragmentation, soil porosity and soil water properties: II. Applications. Soil Sci. Soc. Am. J. 55, 1239-1244.
159. Roytenberg, E., Chaplin, J., 1995. Stochastic modelling of soil conditions during tillage. In: Robert, P.C., Rust, R.H., Larson, E.W. (Eds.), Site Specific Management for Agricultural Systems. Proc. 2nd Int. Conf. Am. Soc. Agron. Madison, WI, pp. 581-599.
160. Russel, R.S., 1977. Plant Root Systems: their Function and Interaction with the Soil. McGraw-Hill, London, UK, p. 298.
161. Shalhevet, J., Kamburov, J., 1976. Irrigation and salinity - a world wide survey. Int. Comm. Irrigation Drainage, New Delhi, India, p. 106.
162. Shumaker, T.E., Smucker, A.J.M., 1981. Mechanical impedance effects on oxygen uptake and porosity of dry bean roots. Agron. J. 73, 51-55.
163. Sinclair, T.R., Park, W.I., 1993. Inadequacy of the Liebig limiting factor paradigm for explaining varying crop yields. Agron. J. 85, 742-746.
164. Singh, K.K., Colvin, T.C., Erbach, D.C., Moghal, A.Q., 1992. Tilth index: an approach to quantify soil tilth. Trans. Am. Soc. Ag. Eng. 35, 1777-1785.
165. Slipher, J.A., 1932. The mechanical manipulation of soil as it affects structure. Agric. Eng. 13, 7-10.
166. Smucker, A.J.M., Aiken, R.L., 1992. Dynamic root response to water deficit. Soil Sci. 154, 281-289.
167. Snyder, V.A., 1992. Plant stresses associated with soil structure. Proc. Workshop Plant Stresses Environ. Kona, Hawaii, pp. 25-30.
168. Snyder and Hadas, 1991.
169. Snyder, V.A., Hadas, A., 1992. Maintaining soil tilth and preferred soil structure under intensive field mechanization through water management and tillage. Final Rep. to BARD - Binational Israel USA Agric. Res. and Dev. Fund. Bet Dagan, Israel, p. 289.
170. Spoor, G., 1975. Fundamental aspects of cultivation. In: Soil Physical Conditions and Crop Production. HMSO, Min. Agric. Fish. Food Technol. Bull. 29, London, UK, pp. 128-144.
171. Spoor, G., Fry, R.K., 1983. Soil disturbance generated by deep-working low rake angle narrow tines. J. Agric. Eng. Res. 28, 217-234.
172. Spoor, G., Goodwin, R.J., 1978. An experimental investigation into the deep loosening of some clay by rigid tines. J. Agric. Eng. Res. 23, 243-258.
173. Spoor, G., Goodwin, R.J., 1979. Soil deformation and shear strength characteristics of some clay soils at different moisture contents. J. Soil Res. 30, 483-498.
174. Soil Science Society of America, SSSA, 1996. Glossary of soil science terms. Am. Soc. Agron. Madison, WI, p. 137.
175. Stafford, J.V., 1979. The performance of a rigid tine in relation to soil properties and speed. J. Agric. Eng. Res. 24, 41-56.
176. Stafford, J.V., 1981. An application of critical state soil mechanics: the performance of rigid tines. J. Agric. Eng. Res. 26, 387-401.
177. Stibbe, E., Hadas, A., 1977. Response of dry-land cotton plant growth, water uptake and lint yields to two extreme types of tillage. Agron. J. 69, 447-451.
178. Stone, J.A., Caspar, T.C., Taylor, H.M., 1983. Prediction of soybean rooting depth as a function of temperature. Agron. J. 75, 1050-1054.
179. Summner, M.E., 1995. Amelioration of subsoil acidity with minimum disturbance. In: Jayawardane, N.S., Stewart, B.A. (Eds.), Subsoil Amelioration Techniques. Lewis Pub., Boca Raton, FL, pp. 147-185.
180. Tardieu, F., 1991. Spatial arrangement of maize roots in the field. In: McMichael, B.L., Pearson, H. (Eds.), Plant Roots and their Environment. Dev. Agric. Manage. Forest Ecol. Elsevier, Amsterdam, The Netherlands, 24, pp. 506-514.
181. Tardieu, F., 1994. Growth and function of roots and of root systems subjected to soil compaction. Toward a system with multiple signaling?. Soil Tillage Res. 30, 217-243.
182. Taylor, H.M., 1983. A program to increase plant available water through rooting modification. In: Int. Symposium on Root Ecology and its Practical Application. Gupenstein, Irdning, Germany, pp. 463-472.
183. Taylor, H.M., Ratliff, L.F., 1969a. Root elongation rates of cotton and peanuts as a function of root strength and soil water content. Soil Sci. 108, 113-119.
184. Taylor, H.M., Ratliff, L.F., 1969b. Root growth pressures of cotton, pea and peanuts. Agron. J. 61, 398-402.
185. Tennant, D., Hamblin, A.P., 1987. Measurement of soil physical conditions in the seedbed under planting systems. In: Coughlin, K.J., Trong, N.P. (Eds.), Effects of Management Practices on Soil Physical Properties. Proc. Nat. Workshop, Toowoomba, Queensland, Australia, pp. 43-47.
186. Tisdall, J.M., Oades, J.M., 1982. Organic matter and water stable aggregates in soil. J. Soil Sci. 19, 70-95.
187. Unger, P.W., 1993. Residual effects of soil profile modification on water infiltration, bulk density and wheat yields. Agron. J. 85, 656-659.
188. Unger, P.W., Kaspar, T.C., 1994. Soil compaction and root growth: a review. Agron. J. 86, 759-766.
189. Unger, P.W., Eck, H.V., Music, J.T., 1981. Alleviating plant water stress. In: Arkin, G.F., Taylor, H.M. (Eds.), Modifying the Root Environment to Reduce Crop Stress. Am. Soc. Agron. Eng. Monograph 4. St. Joseph, MI, pp. 61-96.
190. Utomo, W.H., Dexter, A.R., 1981. Soil friability. J. Soil Sci. 32, 203-213.
191. van Duin, R.H.A., 1956. On the influence of heat, diffusion of air and infiltration of water in the soil. Verl. Landbouwh. 62 (7). Wageningen, The Netherlands, pp. 1-82.
192. van Noordwijk, M., de Willingen, P., 1991. Root function in agricultural systems. In: McMichaal, M.L., Pearson, H. (Eds.), Plant Roots and their Function. Dev. Agric. Manage. Forest Ecol. Elsevier, Amsterdam, The Netherlands, 24, pp. 381-395.
193. van Wijk, W.R. (Ed.), 1963. Physics of Plant Environment. North-Holland, Amsterdam, The Netherlands, p. 382.
194. van Wijk, W.R., Dirksen, W.J., 1963. Sinusoidal temperature variations in a layered soil. In: van Wijk, W.R. (Ed.), Physics of Plant Environment. North-Holland, Amsterdam, The Netherlands, pp. 171-210.
195. Voorhees, W.B., 1992. Wheel induced soil physical limitation to root growth. Adv. Soil Sci. 19, 70-95.
196. Voorhees, W.B., Allamaras, R.R., Johnson, C.E., 1981. Alleviating temperature stress. In: Arkin, G.F., Taylor, H.M. (Eds.), Modifying the Root Environment to Reduce Crop Stress. Am. Soc. Agron. Eng. Monograph, 4. St. Joseph, MI, pp. 217-266.
197. Wagner, L.E., Ding, D., 1993. Stochastic modelling of tillage induced aggregate breakdown. Trans. Am. Soc. Ag. Eng. 36, 1087-1092.
198. Whitley, G.M., Dexter, A.R., 1984. Displacement of soil aggregates by elongating roots and the emerging shoots of crop plants. Plant Soil. 77, 131-140.
199. Whitney, M., 1925. Soil and civilization - a mode concept of the soil and the historical development of agriculture. Van Nostrand-Reinhold, New York, NY, p. 227.
200. Williams, J., Roy, P.J., Bristow, K.L., 1987. Soil physical processes, the properties that control them and their effects on plant growth. In: Coughlan, K.J., Trouge, P.N. (Eds.), Effects of Management Practices on Soil Physical Properties. Dept. Primary Industries. Queensland Gov., Brisbane, Australia, pp. 195-199.
201. Wolf, D., Hadas, A., 1987. Determining efficiencies of various mouldboard ploughs in fragmenting and tilling air-dry soils. Soil Tillage Res. 10, 181-186.
202. Yoder, R.E., 1937. The significance of soil structure in relation to the tilth problem. Soil Sci. Soc. Am. Proc. 2, 21-33.
203. Zaslavski, D., 1968. Average entities in kinematics and thermodynamics of porous materials. Soil Sci. 106, 358-362.
204. Zaslavski, D., Buras, N., 1967. Crop yields response to nonuniform application of irrigation water. Trans. Am. Soc. Ag. Eng. 10, 196-198.
205. Zaslavski, D., Mokady, R.S., 1967. Nonuniform distribution of phosphorus fertilizers: analytical approach. Soil Sci. 104, 1-6.