Blade loosening creates a deeper and near-stable rooting zone that raises the productivity of a structurally unstable texture contrast soil
G. J. Hamilton A E , J. Sheppard B , R. Bowey C and P. Fisher D
+ Author Affiliations
- Author Affiliations
A Maximum Soil & Water Productivity Pty Ltd, 2 Peak Court, Leeming, WA 6149, Australia.
B Environmental Protection Authority, 168 St Georges Terrace, Perth, WA 6000, Australia.
C Department of Agriculture and Food WA, 10 Dore Street, Katanning, WA 6317, Australia.
D Department of Economic Development Jobs Transport and Resources, 255 Ferguson Road, Tatura, Vic. 3616, Australia.
E Corresponding author. Email: gjhamiltong@optusnet.com.au
Soil Research 55(2) 101-113 https://doi.org/10.1071/SR15364
Submitted: 10 December 2015 Accepted: 7 March 2016 Published: 9 August 2016
Abstract
Improving the workability and raising the productivity of structurally weak and/or dispersive texture contrast soils has been the objective of many research projects. These have used applications of gypsum, with and without ripping the top 300–400 mm depth of soil, and responses have been moderate and short lived. The approach taken in the present study was to ameliorate the soil by a combination of subtle soil disturbance to a depth of approximately 300 mm using a specially designed blade loosener, with controlled traffic and no-tillage crop establishment practices. The aim was to use the roots of the stimulated plant growth to stabilise a loosened and deepened root zone. Comparative conditions in the 0–500 mm depth of soil in blade-loosened and normal seedbeds were monitored over three very different growing seasons (2001, 2002 and 2003) using chemical analyses, bulk density (BD), penetration resistance (PR) and soil moisture content measurements. Productivity was monitored by dry matter and grain yield, and profitability by gross margin analyses. Structural stability of the rooting zone soil, or the lack of it, was shown to be a consequence of how the seasonal dynamics of the profile moisture content affected the probability of waterlogged surface soil conditions. In the normal seedbed (control) the surface soil quickly reconsolidated (BD ≥1500 kg m–3), and subsoil BD (BD ≈ 1800 kg m–3), PR (≥1.8 MPa) and percentage saturation (≥95%) remained at levels restrictive of root growth. Conversely, the same properties in the surface and subsoil of the blade-loosened seedbed remained at levels conducive to unrestricted root growth (BD ≤1400 kg m–3, PR ≤1.1 MPa, saturation ≤70%). The blade-loosened treatment was substantially more productive (average grain yield increase 35%; P < 0.05) and profitable (average gross margin increase 56%).
Additional keywords: bulk density, dispersiveness, penetration resistance, profitability.
References
Abadi Ghadim A, Kingwell R, Pannell D (1991) An economic evaluation of deep tillage to reduce compaction on crop-livestock farms in Western Australia. Agricultural Systems 37, 291–307.| An economic evaluation of deep tillage to reduce compaction on crop-livestock farms in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Allen RG, Periera LS, Raes D, Smith M (1998) Determination of ETo. In ‘Crop evapotranspiration: guidelines for computing crop water requirements. FAO irrigation and drainage paper 56’. (FAO: Rome)
American Society of Agricultural Engineers (1999) Procedures for using and reporting data obtained with cone the penetrometers. Standard ASAE EP542 FEB 1999 (revised 2013), American Society of Agricultural Engineers, St Joseph, MI.
Anderson W, French RJ, Seymour M (1992) Yield responses of wheat and their crops to agronomic practices on duplex soils compared with other soils in Western Australia. Australian Journal of Experimental Agriculture 32, 963–972.
| Yield responses of wheat and their crops to agronomic practices on duplex soils compared with other soils in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Atwell BJ (1990) The effect of soil compaction on wheat during early tillering I. Growth, development and root structure. New Phytologist 115, 29–35.
| The effect of soil compaction on wheat during early tillering I. Growth, development and root structure.Crossref | GoogleScholarGoogle Scholar |
Baldock JA (2002). Interactions of organic materials and microorganisms with minerals and the stabilisation of soil structure. In ‘Interactions between soil particles and microorganisms: impact on the terrestrial ecosystem. Vol. 8’. (Eds PM Huang, JM Bollag, N Senesi) pp. 85–131. (IUPAC Series on Analytical and Physical Chemistry of Environmental Systems: New York, NY)
Belford RK, Dracup M, Tennant D (1992) Limitations to growth and yield of cereals and lupin crops on duplex soils. Australian Journal of Experimental Agriculture 32, 929–961.
| Limitations to growth and yield of cereals and lupin crops on duplex soils.Crossref | GoogleScholarGoogle Scholar |
Brouwer R (1983) Functional equilibrium: sense or nonsense? Netherlands Journal of Agricultural Science 31, 335–348.
Davidson RL (1969) Effect of root/leaf temperature differentials on root/shoot ratios in some pasture grasses and cover. Annals of Botany 33, 561–569.
Dexter AR (1991) Amelioration of soil by natural processes. Soil & Tillage Research 20, 87–100.
| Amelioration of soil by natural processes.Crossref | GoogleScholarGoogle Scholar |
Dracup M, Belford RK, Gregory PJ (1992) Constraints to root growth of wheat and lupin crops on duplex soils. Australian Journal of Experimental Agriculture 32, 947–961.
| Constraints to root growth of wheat and lupin crops on duplex soils.Crossref | GoogleScholarGoogle Scholar |
Ellington A (1996) Deep tillage research in Western Australia. In ‘A review of deep tillage research in Western Australia’. Technical Report No. 13. (Ed. MW Perry) pp. 100–108. (Department of Agriculture Western Australia: Perth, WA)
Ellington A, Badawy NS, Ganning GW (1997) Testing gypsum requirements for dryland cropping on a Red–Brown Earth. Australian Journal of Soil Research 35, 591–608.
| Testing gypsum requirements for dryland cropping on a Red–Brown Earth.Crossref | GoogleScholarGoogle Scholar |
Emerson WW (1967) A classification of soil aggregates based on their coherence in water. Australian Journal of Soil Research 5, 47–57.
| A classification of soil aggregates based on their coherence in water.Crossref | GoogleScholarGoogle Scholar |
Farrar JF, Jones DL (2000) The control of carbon acquisition by roots. New Phytologist 147, 43–53.
| The control of carbon acquisition by roots.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXms1ylt7o%3D&md5=878a936942342878f1f279fb978ab2c4CAS |
Findenegg G R (1990) Effect of varied shoot/root ratio on growth of maize (Zea mays) under nitrogen-limited conditions: growth experiment and model calculations. In ‘Developments in plant and soil sciences. Proceedings of the 11th International Plant Nutrition Colloquium’, 30 July–4 August 1989, Wageningen, The Netherlands. pp. 21–27. (Springer: The Netherlands)
Haines PJ, Uren NC (1990) Effects of conservation tillage farming on soil microbial biomass, organic matter and earthworm populations in north-eastern Victoria. Australian Journal of Experimental Agriculture 30, 365–371.
| Effects of conservation tillage farming on soil microbial biomass, organic matter and earthworm populations in north-eastern Victoria.Crossref | GoogleScholarGoogle Scholar |
Hall DJM, McKenzie DC, MacLeod DA, Toole ID (1994) Amelioration of a hardsetting Alfisol through deep mouldboard ploughing and double cropping. III Crop production and profitability. Soil & Tillage Research 28, 287–300.
| Amelioration of a hardsetting Alfisol through deep mouldboard ploughing and double cropping. III Crop production and profitability.Crossref | GoogleScholarGoogle Scholar |
Hamilton GJ, Fisher P, Braimbridge M, Bignell J, Sheppard J, Bowey R (2005) Managing Grey Clay soils to maximise production and sustainability (revised edition). Bulletin 4666, Department of Agriculture, Western Australia, Perth, WA.
Hamza MA, Anderson WK (2003) Responses of soil properties and grain yields to deep ripping and gypsum application in a compacted loamy sand contrasted with a sandy clay loam soil in Western Australia. Australian Journal of Agricultural Research 54, 273–282.
| Responses of soil properties and grain yields to deep ripping and gypsum application in a compacted loamy sand contrasted with a sandy clay loam soil in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Hamza MA, Anderson WK (2008) Combinations of ripping depth and tine spacing for compacted sand and clayey soils. Soil & Tillage Research 99, 213–220.
| Combinations of ripping depth and tine spacing for compacted sand and clayey soils.Crossref | GoogleScholarGoogle Scholar |
Havlin JL, Kissel DE, Maddox LD, Classen MM, Long JH (1990) Crop rotation and tillage effects on soil organic carbon and nitrogen. Soil Science Society of America Journal 54, 448–452.
| Crop rotation and tillage effects on soil organic carbon and nitrogen.Crossref | GoogleScholarGoogle Scholar |
Isbell RF (2002) ‘The Australian soil classification. Revised edition. Australian Soil and Land Survey Handbook. Series 4.’ (CSIRO Publishing: Melbourne)
Ley GJ, Mullins CE, Lal R (1989) Hard-setting behaviour of some structurally weak tropical soils. Soil & Tillage Research 13, 365–381.
| Hard-setting behaviour of some structurally weak tropical soils.Crossref | GoogleScholarGoogle Scholar |
Lipiec J, Medvedev VV, Birkas M, Dumitru E, Lyndia TE, Rousseva S, Fulatjar E (2003) Effect of soil compaction on root growth and crop yield in Central and Eastern Europe. International Agrophysics 17, 61–69.
Mathe L, Pillinger G, Kiss P (2010) Effects of varying moisture content and settlement on internal friction, load capacity and cohesion in loam soil. In ‘World automotive congress’, Vol. 5, Congress Theme 3, 30 May–4 June 2010, Budapest, Hungary. pp. 3968–3972. (GTE: Budapest)
Northcote KH (1984) ‘A factual key for the recognition of Australian soils.’ (Rellim Technical Publications: Adelaide, SA)
Oades JM (1984) Soil organic matter and structural stability: mechanisms and implications for management. Plant and Soil 76, 319–337.
| Soil organic matter and structural stability: mechanisms and implications for management.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2cXhvFSksbw%3D&md5=d861b6962cb3a27d065109fee12ce91dCAS |
Pankhurst CE, Hawke BG, McDonald HJ, Kirkby CA, Buckerfield JC, Michelson P, O’Brien KA, Gupta WSR, Doube BM (1995) Evaluation of soil biological properties and bioindicators of soil health. Australian Journal of Experimental Agriculture 35, 1015–1028.
| Evaluation of soil biological properties and bioindicators of soil health.Crossref | GoogleScholarGoogle Scholar |
Philip JR (1957) Evaporation and moisture and heat fields in the soil. Journal of Meteorology 14, 354–366.
| Evaporation and moisture and heat fields in the soil.Crossref | GoogleScholarGoogle Scholar |
Reid JB, Goss MJ (1981) Effect of living roots of different plant species on the aggregate stability of two arable soils. Journal of Soil Science 32, 521–541.
| Effect of living roots of different plant species on the aggregate stability of two arable soils.Crossref | GoogleScholarGoogle Scholar |
Rengasamy P, Green RSB, Ford GW (1986) Influence of magnesium on aggregate stability in sodic red brown earths. Australian Journal of Soil Research 24, 229–237.
| Influence of magnesium on aggregate stability in sodic red brown earths.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28XkvFKmsrk%3D&md5=96b29acdd836780cd7c3d44ee84ecf5dCAS |
Seymour M, French B, Malik R, Bucat J (2014) ‘Plant density of canola in low-medium rainfall regions of Western Australia.’ (Grains Research and Development Corporation Crop Updates: Esperance, WA)
Taylor HM, Roberson GM, Parker JJ (1966) Soil strength–root penetration relations for medium to course textures soil materials. Soil Science 102, 18–22.
| Soil strength–root penetration relations for medium to course textures soil materials.Crossref | GoogleScholarGoogle Scholar |
Tennant D, Scholz G, Dixon J, Purdie B (1992) Physical and chemical characteristics of duplex soils and their distribution in the south west of Western Australia. Australian Journal of Experimental Agriculture 32, 827–843.
| Physical and chemical characteristics of duplex soils and their distribution in the south west of Western Australia.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2cXot1Skug%3D%3D&md5=8ef096192c46d01ecfbc11a6a9f20cdfCAS |
Tisdall JM, Oades JM (1982) Organic matter and water stable aggregates in soils. Journal of Soil Science 33, 141–163.
| Organic matter and water stable aggregates in soils.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL38XlsVels7w%3D&md5=177f36ec03e780b29b6204cb7a6e6294CAS |
Tobias S (1994) Shear strength of the soil root system: in situ shear tests. In ‘International Congress of European Society for Soil Conservation’, Silsoe, 1992. pp. 405–412. (CAB International: Wallingford, UK)
Waldron IJ, Dakessian S (1981) Soil reinforcement by roots: calculation of increased shear resistance from root properties. Soil Science 132, 427–435.
| Soil reinforcement by roots: calculation of increased shear resistance from root properties.Crossref | GoogleScholarGoogle Scholar |
Wesseling J (1974). Crop growth and wet soils. In ‘Drainage for agriculture’. Agronomy No. 17. (Ed. J van Schilfgaarde) pp. 7–37. (American Society of Agronomy Inc.: Madison, WI)
Wuest SB (2001) Soil biopore estimation: effects of tillage, nitrogen, and photographic resolution. Soil & Tillage Research 62, 111–116.
| Soil biopore estimation: effects of tillage, nitrogen, and photographic resolution.Crossref | GoogleScholarGoogle Scholar |
