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Soil Research Soil Research Society
Soil, land care and environmental research
RESEARCH ARTICLE

Effects of tillage practices on soil and water phosphorus and nitrogen fractions in a Chromosol at Rutherglen in Victoria, Australia

Nicole J. Mathers A B and David M. Nash A

A Future Farming Systems Research Division, Department of Primary Industries – Ellinbank Centre, 1301 Hazeldean Rd, Ellinbank, Vic. 3821, Australia.

B Corresponding author. Email: Nicole.Mathers@dpi.vic.gov.au

Australian Journal of Soil Research 47(1) 46-59 http://dx.doi.org/10.1071/SR08106
Submitted: 1 May 2008  Accepted: 2 December 2008   Published: 18 February 2009

Abstract

Phosphorus (P) and nitrogen (N) exports from cropping areas can be greater than those from uncropped areas. Conservation farming methods, involving minimal tillage and full stubble retention, offer significant benefits to grain cropping, but may increase nutrient concentrations in surface (i.e. 0–20 mm) soils, resulting in increased risks of nutrient mobilisation and loss. The effects of tillage and stubble management on soil nutrients that are potentially mobilised into runoff from a long-term trial site at Rutherglen (established in 1981) were investigated. On 2 different sampling dates (February and August 2006) soils from the 0–20, 20–50, and 50–150 mm depths were collected from 3 treatments: conventional cultivation with stubble burning (CCb); direct drill with stubble burning (DDb); and direct drill with stubble retained (DDr). In 2004, the trial was sown with wheat (Triticum aestivum cv. Dollarbird), followed by faba beans in 2005 (Vicia faba L.) and wheat again in 2006. In August 2006, a rainfall simulation experiment was also conducted on these sites.

All nutrient concentrations decreased with depth to 150 mm in all treatments, when both sampling dates were analysed together. This indicated that soil nutrient stratification was occurring in all 3 treatments. The CCb treatment only displayed differences between the 0–20 and 20–50 mm depths for soil organic C and ammonium-N. DDr significantly increased some nutrient concentrations in the 0–20 mm soil depth compared with the CCb treatment, including CaCl2-extractable P (0.76 and 0.50 mg/kg, for DDr and CCb, respectively), total N (1.23 and 1.00 g/kg, for DDr and CCb, respectively), and nitrate-N (12.6 and 8.63 mg/kg, for DDr and CCb, respectively), while the ammonium-N concentration was greater under CCb (9.71 mg/kg) than DDr (6.46 mg/kg). Being water-soluble, CaCl2-extractable P and nitrate-N are more likely be mobilised into streams from the 0–20 mm depth, where they are highly bioavailable and may contribute to increased eutrophication.

Direct drilling with stubble retention contributed a greater proportion of particulate P and N to TP (Total P) and TN (Total N) in surface runoff than either of the burnt systems. Particulate P accounted for 75%, 67%, and 83% of TP in surface runoff from the CCb, DDb, and DDr treatments, respectively. However, the highly bioavailable dissolved reactive P (DRP) was the dominant form of dissolved P, with concentrations exceeding the recommended guidelines of 0.05 mg P/L in the lowlands of south-east Australia. Total N (0.44, 0.68, and 0.73 mg N/L for DDr, DDb, and CCb, respectively) in surface runoff was dominated by nitrate-N and also exceeded current Australian guidelines of 0.5 mg N/L, except for TN from the DDr treatment.

These results would indicate that P, particularly the non-dominant but highly bioavailable form of DRP, exported from these systems is more likely to adversely affect catchment water quality than N exports. The increase in surface runoff volumes and nutrient loads from the CCb treatment observed in this study indicate that DDr systems have increased soil infiltration properties and retained nutrients within the soil–plant system. Therefore, direct drilling with stubble retention in the high rainfall zone cropping areas of north-east Victoria is more likely to retain nutrients on-site and improve soil fertility than burning stubble and cultivating the soil.

Additional keywords: direct drill, stubble retention, conventional cultivation, nutrient export, simulated rainfall.


References

Ahuja LR Lehman OR 1983 The extent and nature of rainfall soil interaction in the release of soluble chemicals to runoff. Journal of Environmental Quality 12 34 40

Andraski BJ Daniel TC Lowery B Mueller DH 1985 a Runoff results from natural and simulated rainfall for four tillage systems. Transactions of the American Society of Agricultural Engineers 28 1219 1225


Andraski BJ Mueller DH Daniel TC 1985 b Phosphorus losses in runoff as affected by tillage. Soil Science Society of America Journal 49 1523 1527


ANZECC (2000) ‘Australian and New Zealand guidelines for fresh and marine water quality.’ (Australian and New Zealand Environment and Conservation Council, Agriculture and Resource Management Council of Australia and New Zealand: Canberra, ACT)

Barlow K Nash D Grayson RB 2005 Phosphorus export at the paddock, farm-section, and whole farm scale on an irrigated dairy farm in south-eastern Australia. Australian Journal of Agricultural Research 56 1 9
doi:10.1071/AR04166

Biggs BJF Close ME 1989 Periphyton biomass dynamics in gravel bed rivers: the relative effects of flows and nutrients. Freshwater Biology 22 209 231 doi:10.1111/j.1365-2427.1989.tb01096.x

Bloesch PM Rayment GE 2006 Phosphorus fertility assessment of intensively farmed areas of catchments draining to the Great Barrier Reef world heritage area; 2: Potential of soils to release soluble phosphorus. Communications in Soil Science and Plant Analysis 37 2265 2276 doi:10.1080/00103620600817580

Buczko U Kuchenbuch RO 2007 Phosphorus indices as risk-assessment tools in the U.S.A. and Europe—a review. Journal of Plant Nutrition and Soil Science 170 445 460 doi:10.1002/jpln.200725134

Bundy LG Andraski TW Powell JM 2001 Management practice effects on phosphorus losses in runoff in corn production systems. Journal of Environmental Quality 30 1822 1828

Bünemann EK Heenan DP Marschner P McNeill AM 2006 Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics. Australian Journal of Soil Research 44 611 618
doi:10.1071/SR05188

Carter MR Mele PM 1992 Changes in microbial biomass and structural stability at the surface of a duplex soil under direct drilling and stubble retention in north-eastern Australia. Australian Journal of Soil Research 30 493 503 doi:10.1071/SR9920493

Carter MR Steed GR 1992 The effects of direct drilling and stubble retention on hydraulic properties at the surface of duplex soils in north-eastern Victoria. Australian Journal of Soil Research 30 505 516 doi:10.1071/SR9920505

Chan KY Heenan DP Oates A 2002 Soil carbon fractions and relationship to soil quality under different tillage and stubble management. Soil & Tillage Research 63 133 139 doi:10.1016/S0167-1987(01)00239-2

Chan KY Roberts WP Heenan DP 1992 Organic carbon and associated soil properties of a red earth after 10 years of rotation under different stubble and tillage practices. Australian Journal of Soil Research 30 71 83 doi:10.1071/SR9920071

Connolly RD Freebairn DM Bridge BJ 1997 Change in infiltration characteristics associated with cultivation history of soils in south-eastern Queensland. Australian Journal of Soil Research 35 1341 1358 doi:10.1071/S97032

Corangamite Catchment Management Authority (2003) ‘Corangamite regional catchment strategy 2003–2008.’ (Corangamite Catchment Management Authority: Colac, Vic.)

Coskan A Gok M Dogan K 2007 Effect of wheat stubble burning and tobacco waste application on mineral nitrogen content of soil at different depth. International Journal of Soil Science 2 55 61

Curtin D Campbell CA Jalil A 1998 Effects of acidity on mineralization: pH-dependence of organic matter mineralization in weakly acidic soils. Soil Biology & Biochemistry 30 57 64
doi:10.1016/S0038-0717(97)00094-1

Dalal RC Mayer RJ 1986 Long-term trends in fertility of soils under continuous cultivation and cereal cropping in southern Queensland. II. Total organic carbon and its rate of loss from the soil profile. Australian Journal of Soil Research 24 281 292 doi:10.1071/SR9860281

Dalal RC Wang W Robertson GP Parton WJ 2003 Nitrous oxide emission from Australian agricultural lands and mitigation options: a review. Australian Journal of Soil Research 41 165 195 doi:10.1071/SR02064

Dougherty WJ Nash DM Chittleborough DJ Cox JW Fleming NK 2006 Stratification, forms and mobility of phosphorus in topsoil of a Chromosol used for dairying. Australian Journal of Soil Research 44 277 284 doi:10.1071/SR05076

Franklin D Truman C Potter T Bosch D Strickland T Bednarz C 2007 Nitrogen and phosphorus runoff losses from variable and constant intensity rainfall simulations on loamy sand under conventional and strip tillage systems. Journal of Environmental Quality 36 846 854 doi:10.2134/jeq2005.0359

Franzluebbers AJ 2002 Soil organic matter stratification ratio as an indicator of soil quality. Soil & Tillage Research 66 95 106 doi:10.1016/S0167-1987(02)00018-1

Franzluebbers AJ Hons FM Zuberer DA 1995 Tillage and crop effects on seasonal soil carbon and nitrogen dynamics. Soil Science Society of America Journal 59 1618 1624

Genstat Committee (2005) ‘Genstat for Windows. Release 8.1.’ (VSN International Ltd: Hemel Hempstead, UK)

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
doi:10.1071/EA9900365

Heenan DP Chan KY Knight PG 2004 Long-term impact of rotation, tillage and stubble management on the loss of soil organic carbon and nitrogen from a Chromic Luvisol. Soil & Tillage Research 76 59 68 doi:10.1016/j.still.2003.08.005

Holland JM 2004 The environmental consequences of adopting conservation tillage in Europe: reviewing the evidence. Agriculture, Ecosystems & Environment 103 1 25 doi:10.1016/j.agee.2003.12.018

Holmes G (2002) ‘Glenelg-Hopkins Catchment Nutrient Management Plan.’ (Glenelg-Hopkins Catchment Management Authority: Hamilton)

Humphry JB Daniel TC Edwards DR Sharpley AN 2002 A portable rainfall simulator for plot-scale runoff studies. Applied Engineering in Agriculture 18 199 204

Isbell RF (2002) ‘The Australian Soil Classification.’ (CSIRO Publishing: Collingwood, Vic.)

Kimmell RJ Pierzynski GM Janssen KA Barnes PL 2001 Effects of tillage and phosphorus placement on phosphorus runoff losses in a grain sorghum-soybean rotation. Journal of Environmental Quality 30 1324 1330


Kirkegaard JA 1995 A review of trends in wheat yield responses to conservation cropping in Australia. Australian Journal of Experimental Agriculture 35 835 848
doi:10.1071/EA9950835

Mathers NJ Nash D Gangaiya P 2007 Nitrogen and phosphorus exports from high rainfall zone cropping in Australia: issues and opportunities for research. Journal of Environmental Quality 36 1551 1562 doi:10.2134/jeq2006.0464

McDowell R McGregor KC 1984 Plant nutrient losses in runoff from conservation tillage corn. Soil & Tillage Research 4 79 91 doi:10.1016/0167-1987(84)90018-7

McDowell RW Biggs BJF Sharpley AN Nguyen L 2004 Connecting phosphorus loss from agricultural landscapes to surface water quality. Chemistry and Ecology 20 1 40 doi:10.1080/02757540310001626092

McDowell RW Koopmans GF 2006 Assessing the bioavailability of dissolved organic phosphorus in pasture and cultivated soils treated with different rates of nitrogen fertiliser. Soil Biology & Biochemistry 38 61 70 doi:10.1016/j.soilbio.2005.03.026

McDowell RW Sharpley AN 2001 Approximating phosphorus release from soils to surface runoff and subsurface drainage. Journal of Environmental Quality 30 508 520

Murphy J Riley JP 1962 A modified single solution method for the determination of phosphate in natural waters. Analytica Chimica Acta 27 31 36
doi:10.1016/S0003-2670(00)88444-5

Nash DM Halliwell D 1999 Fertilisers and phosphorus loss from productive grazing systems. Australian Journal of Soil Research 37 403 429 doi:10.1071/S98087

Nash DM , Halliwell D , Cox J (2002) Hydrological mobilisation of pollutants at the slope/field scale. In ‘Agriculture, hydrology and water quality’. (Eds PM Haygarth, SC Jarvis) pp. 225–242. (CABI Publishing: Oxon, UK)

Nash D Hannah M Barlow K Robertson F Mathers N Butler C Horton J 2007 a A comparison of some surface soil phosphorus tests that could be used to assess P export potential. Australian Journal of Soil Research 45 397 400 doi:10.1071/SR06142

Nash DM Webb B Hannah M Adeloju S Toifl M Barlow K Robertson F Roddick F Porter N 2007 b Changes in nitrogen and phosphorus concentrations in soil, soil water and surface run-off following grading of irrigation bays used for intensive grazing. Soil Use and Management 23 374 383 doi:10.1111/j.1475-2743.2007.00100.x

Newton PJ 2001 Effect of long-term stubble management on yield and nitrogen-uptake efficiency of wheat topdressed with urea in north-eastern Victoria. Australian Journal of Experimental Agriculture 41 1167 1178 doi:10.1071/EA00109

Northcote KH (1979) ‘A factual key for the recognition of Australian soils.’ (Rellim Technical Publications: Adelaide, S. Aust.)

Peigne J Ball BC Roger-Estrade J David C 2007 Is conservation tillage suitable for organic farming? A review. Soil Use and Management 23 129 144 doi:10.1111/j.1475-2743.2006.00082.x

Penn CJ Mullins GL Zelazny LW Sharpley AN 2006 Estimating dissolved phosphorus concentrations in runoff from three physiographic regions of Virginia. Soil Science Society of America Journal 70 1967 1974 doi:10.2136/sssaj2006.0027

Peters RH 1981 Phosphorus availability in Lake Memphremagog and its tributaries. Limnology and Oceanography 26 1150 1161

Pocknee S Sumner ME 1997 Cation and nitrogen contents of organic matter determine its soil liming potential. Soil Science Society of America Journal 61 86 92


Poole ML Turner NC Young JM 2002 Sustainable cropping systems for high rainfall areas of southwestern Australia. Agricultural Water Management 53 201 211
doi:10.1016/S0378-3774(01)00165-2

Powlson DS Brookes PC Christensen BT 1987 Measurement of soil microbial biomass provides an early indication of changes in total soil organic matter due to straw incorporation. Soil Biology & Biochemistry 19 159 164 doi:10.1016/0038-0717(87)90076-9

Rayment GE , Higginson FR (1992) ‘Australian laboratory handbook of soil and water chemical methods.’ (Inkata Press: Melbourne, Vic.)

Reeves TG Ellington A Brooke HD 1984 Effects of lupin-wheat rotations on soil fertility, crop disease and crop yields. Australian Journal of Experimental Agriculture and Animal Husbandry 24 595 600 doi:10.1071/EA9840595

Richardson CW King KW 1995 Erosion and nutrient loss from zero tillage on a clay soil. Journal of Agricultural Engineering Research 61 81 86 doi:10.1006/jaer.1995.1034

Robertson FA Nash DM 2008 Phosphorus and nitrogen in soil, plants, and overland flow from sheep-grazed pastures fertilized with different rates of superphosphate. Agriculture, Ecosystems & Environment 126 195 208 doi:10.1016/j.agee.2008.01.023

Schofield RK 1955 Can a precise meaning be given to “available” soil phosphorus? Soils and Fertilizers 18 373 375

Schreiber JD 1999 Nutrient leaching from corn residues under simulated rainfall. Journal of Environmental Quality 28 1864 1870


Sharpley AN 1995 Dependence of runoff phosphorus on extractable soil phosphorus. Journal of Environmental Quality 24 920 927


Sharpley AN 2003 Soil mixing to decrease surface stratification of phosphorus in manured soils. Journal of Environmental Quality 32 1375 1384


Sharpley AN Daniel TC Edwards DR 1993 Phosphorus movement in the landscape. Journal of Productive Agriculture 6 492 499


Sharpley AN Kleinman P 2003 Effect of rainfall simulator and plot scale on overland flow and phosphorus transport. Journal of Environmental Quality 32 2172 2179


Sharpley AN Menzel RG 1987 The impact of soil and fertilizer phosphorus on the environment. Advances in Agronomy 41 297 324
doi:10.1016/S0065-2113(08)60807-X

Sharpley AN Smith SJ 1994 Wheat tillage and water quality in the Southern Plains. Soil & Tillage Research 30 33 48 doi:10.1016/0167-1987(94)90149-X

Sharpley AN Smith SJ Jones OR Berg WA Coleman GA 1992 The transport of bioavailable phosphorus in agricultural runoff. Journal of Environmental Quality 21 30 35

Soil Survey Staff (2006) ‘Keys to Soil Taxonomy.’ (United States Department of Agriculture, Natural Resources Conservation Services: Washington, DC)

The State of Victoria (2002) ‘The health of our catchments: A Victorian report card.’ (The State of Victoria, Victorian Catchment Management Council: Melbourne, Vic.)

Tian YQ Yin B Yang L Yin S Zhu Z 2007 Nitrogen runoff and leaching losses during rice-wheat rotations in Taihu Lake Region, China. Pedosphere 17 445 456
doi:10.1016/S1002-0160(07)60054-X

Toifl M Nash D Roddick F Porter N 2003 Effect of centrifuge conditions on water and total dissolved phosphorus extraction from rewet and field wet soils. Australian Journal of Soil Research 41 1533 1542 doi:10.1071/SR03012

Vogeler I Horn R Wetzel H Krummelbein J 2006 Tillage effects on soil strength and solute transport. Soil & Tillage Research 88 193 204 doi:10.1016/j.still.2005.05.009

Whitbread A Blair G Lefroy R 2000 Managing legume leys, residues and fertilisers to enhance the sustainability of wheat cropping systems in Australia. 1. The effects on wheat yields and nutrient balances. Soil & Tillage Research 54 63 75 doi:10.1016/S0167-1987(99)00112-9

Wright AL Dou F Hons FM 2007 Soil organic C and N distribution for wheat cropping systems after 20 years of conservation tillage in central Texas. Agriculture, Ecosystems & Environment 121 376 382 doi:10.1016/j.agee.2006.11.011

Zhang GS Chan KY Oates A Heenan DP Huang GB 2007 Relationship between soil structure and runoff/soil loss after 24 years of conservation tillage. Soil & Tillage Research 92 122 128 doi:10.1016/j.still.2006.01.006

Zhang H Schroder JL Davis RL Wang JJ Payton ME Thomason WE Tang Y Raun WR 2006 a Phosphorus loss in runoff from long-term continuous wheat fertility trials. Soil Science Society of America Journal 70 163 171 doi:10.2136/sssaj2005.0102

Zhang H Turner NC Poole ML Simpson N 2006 b Crop production in the high rainfall zones of southern Australia — potential, constraints and opportunities. Australian Journal of Experimental Agriculture 46 1035 1049 doi:10.1071/EA05150



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