Crop rotational diversity impacts soil physical and hydrological properties under long-term no- and conventional-till soils
Abdullah Alhameid A , Jasdeep Singh A , Udayakumar Sekaran A , Ekrem Ozlu B , Sandeep Kumar![https://orcid.org/0000-0002-2717-5455](/media/client/orcid_16x16.png)
A South Dakota State University, Department of Agronomy, Horticulture and Plant Science, Brookings, SD 57007, USA.
B University of Wisconsin-Madison, Department of Soil Science, Madison, WI 53006, USA.
C USDA-ARS, Beltsville, MD, USA.
D Corresponding author. Email: Sandeep.Kumar@sdstate.edu
Soil Research 58(1) 84-94 https://doi.org/10.1071/SR18192
Submitted: 29 August 2018 Accepted: 11 September 2019 Published: 2 October 2019
Abstract
Diversification of crop species and minimum mechanical soil disturbance are the interlinked principles of conservation agriculture that are beneficial in improving soil physical and hydrological properties, and hence crop productivity. The present study was conducted to assess the long-term impacts of crop rotational diversity and tillage on soil water infiltration (qs), soil water retention (SWR), pore size distribution (PSD), bulk density (ρb) and soil penetration resistance (SPR). The study was established in 1991 at Beresford, South Dakota, and included three crop rotation systems (2-year, maize (Zea mays L.)–soybean (Glycine max L.); 3-year, maize–soybean–wheat (Triticum aestivum L.); and 4-year, maize–soybean–wheat–oat (Avena sativa L.)) and two tillage systems (NT, no-tillage; and CT, conventional tillage). Soil samples were collected only under maize and soybean phases of the crop rotations. Our results showed that NT with 4-year rotation had the lowest ρb under maize and soybean phases (1.21 and 1.19 g cm–3 respectively) compared with the CT system. Similarly, NT with 4-year rotation decreased SPR by 20% compared to CT with 4-year rotation in the soybean phase. Soils managed under NT with 4-year rotation in the soybean phase retained 27, 28, 28, 32, 33, 31 and 26% more water compared with CT and 4-year system at 0–7.5 cm depth at 0, –0.4, –1.0, –2.5, –5.0, –10 and –30 kPa matric potentials respectively. A similar trend was observed for qs under the same treatments, in which it was 31% higher under NT than under CT, both with 4-year rotation. Data from this study showed that diversified crop rotation under NT enhanced soil physical and hydrological properties compared with CT with less diverse systems (e.g. maize–soybean).
Additional keywords: chisel plow, diverse crop rotations, maize–soybean rotation, soil bulk density, soil penetration resistance, soil water retention, water infiltration rate.
References
Abdollahi L, Hansen EM, Rickson RJ, Munkholm LJ (2015) Overall assessment of soil quality on humid sandy loams: Effects of location, rotation and tillage. Soil & Tillage Research 145, 29–36.| Overall assessment of soil quality on humid sandy loams: Effects of location, rotation and tillage.Crossref | GoogleScholarGoogle Scholar |
Abu S, Abubakar I (2013) Evaluating the effects of tillage techniques on soil hydro-physical properties in Guinea Savanna of Nigeria. Soil & Tillage Research 126, 159–168.
| Evaluating the effects of tillage techniques on soil hydro-physical properties in Guinea Savanna of Nigeria.Crossref | GoogleScholarGoogle Scholar |
Alam MK, Islam MM, Salahin N, Hasanuzzaman M (2014) Effect of tillage practices on soil properties and crop productivity in wheat-mungbean-rice cropping system under subtropical climatic conditions. TheScientificWorldJournal 2014, 437283
| Effect of tillage practices on soil properties and crop productivity in wheat-mungbean-rice cropping system under subtropical climatic conditions.Crossref | GoogleScholarGoogle Scholar | 25197702PubMed |
Alhameid A, Ibrahim M, Kumar S, Sexton P, Schumacher T (2017) Soil organic carbon changes impacted by crop rotational diversity under no-till farming in South Dakota, USA. Soil Science Society of America Journal 81, 868–877.
| Soil organic carbon changes impacted by crop rotational diversity under no-till farming in South Dakota, USA.Crossref | GoogleScholarGoogle Scholar |
Alvarez R, Steinbach HS (2009) A review of the effects of tillage systems on some soil physical properties, water content, nitrate availability and crops yield in the Argentine Pampas. Soil & Tillage Research 104, 1–15.
| A review of the effects of tillage systems on some soil physical properties, water content, nitrate availability and crops yield in the Argentine Pampas.Crossref | GoogleScholarGoogle Scholar |
Armenise E, Simmons RW, Ahn S, Garbout A, Doerr SH, Mooney SJ, Sturrock CJ, Ritz K (2018) Soil seal development under simulated rainfall: Structural, physical and hydrological dynamics. Journal of Hydrology 556, 211–219.
| Soil seal development under simulated rainfall: Structural, physical and hydrological dynamics.Crossref | GoogleScholarGoogle Scholar | 29332951PubMed |
Bathke GR, Blake G (1984) Effects of soybeans on soil properties related to soil erodibility. Soil Science Society of America Journal 48, 1398–1401.
| Effects of soybeans on soil properties related to soil erodibility.Crossref | GoogleScholarGoogle Scholar |
Bauer A, Black A (1994) Quantification of the effect of soil organic matter content on soil productivity. Soil Science Society of America Journal 58, 185–193.
| Quantification of the effect of soil organic matter content on soil productivity.Crossref | GoogleScholarGoogle Scholar |
Benjamin J (1993) Tillage effects on near-surface soil hydraulic properties. Soil & Tillage Research 26, 277–288.
| Tillage effects on near-surface soil hydraulic properties.Crossref | GoogleScholarGoogle Scholar |
Bhattacharyya R, Prakash V, Kundu S, Gupta H (2006) Effect of tillage and crop rotations on pore size distribution and soil hydraulic conductivity in sandy clay loam soil of the Indian Himalayas. Soil & Tillage Research 86, 129–140.
| Effect of tillage and crop rotations on pore size distribution and soil hydraulic conductivity in sandy clay loam soil of the Indian Himalayas.Crossref | GoogleScholarGoogle Scholar |
Brar B, Singh K, Dheri G (2013) Carbon sequestration and soil carbon pools in a rice–wheat cropping system: effect of long-term use of inorganic fertilizers and organic manure. Soil & Tillage Research 128, 30–36.
| Carbon sequestration and soil carbon pools in a rice–wheat cropping system: effect of long-term use of inorganic fertilizers and organic manure.Crossref | GoogleScholarGoogle Scholar |
Busari MA, Kukal SS, Kaur A, Bhatt R, Dulazi AA (2015) Conservation tillage impacts on soil, crop and the environment. International Soil and Water Conservation Research 3, 119–129.
| Conservation tillage impacts on soil, crop and the environment.Crossref | GoogleScholarGoogle Scholar |
Busscher W, Bauer P (2003) Soil strength, cotton root growth and lint yield in a southeastern USA coastal loamy sand. Soil & Tillage Research 74, 151–159.
| Soil strength, cotton root growth and lint yield in a southeastern USA coastal loamy sand.Crossref | GoogleScholarGoogle Scholar |
Carroll C, Halpin M, Burger P, Bell K, Sallaway M, Yule D (1997) The effect of crop type, crop rotation, and tillage practice on runoff and soil loss on a Vertisol in central Queensland. Soil Research 35, 925–940.
| The effect of crop type, crop rotation, and tillage practice on runoff and soil loss on a Vertisol in central Queensland.Crossref | GoogleScholarGoogle Scholar |
Coulter JA, Nafziger ED, Wander MM (2009) Soil organic matter response to cropping system and nitrogen fertilization. Agronomy Journal 101, 592–599.
| Soil organic matter response to cropping system and nitrogen fertilization.Crossref | GoogleScholarGoogle Scholar |
Dal Ferro N, Sartori L, Simonetti G, Berti A, Morari F (2014) Soil macro-and microstructure as affected by different tillage systems and their effects on maize root growth. Soil & Tillage Research 140, 55–65.
| Soil macro-and microstructure as affected by different tillage systems and their effects on maize root growth.Crossref | GoogleScholarGoogle Scholar |
Eynard A, Schumacher T, Lindstrom M, Malo D (2004) Porosity and pore-size distribution in cultivated Ustolls and Usterts. Soil Science Society of America Journal 68, 1927–1934.
| Porosity and pore-size distribution in cultivated Ustolls and Usterts.Crossref | GoogleScholarGoogle Scholar |
Fabrizzi K, Garcıa F, Costa J, Picone L (2005) Soil water dynamics, physical properties and corn and wheat responses to minimum and no-tillage systems in the southern Pampas of Argentina. Soil & Tillage Research 81, 57–69.
| Soil water dynamics, physical properties and corn and wheat responses to minimum and no-tillage systems in the southern Pampas of Argentina.Crossref | GoogleScholarGoogle Scholar |
FAO (2010) What is conservation? Available at http://www.fao.org/conservation-agriculture/overview/what-is-conservation-agriculture/en/ [Verified 19 September 2019].
Feng Y, Balkcom KS (2017) Nutrient cycling and soil biology in row crop systems under intensive tillage. In ‘Soil health and intensification of agroecosytems’. (Eds MM Al-Kaisi, B Lowery) pp. 231–255. (Academic Press: London, UK)
Govaerts B, Fuentes M, Mezzalama M, Nicol JM, Deckers J, Etchevers JD, Figueroa-Sandoval B, Sayre KD (2007) Infiltration, soil moisture, root rot and nematode populations after 12 years of different tillage, residue and crop rotation managements. Soil & Tillage Research 94, 209–219.
| Infiltration, soil moisture, root rot and nematode populations after 12 years of different tillage, residue and crop rotation managements.Crossref | GoogleScholarGoogle Scholar |
Grossman R, Reinsch T (2002) Bulk density and linear extensibility. In ‘Methods of soil analysis: Part 4 –Physical methods’. SSSA Book Ser. 5.4. (Eds JH Dane, CG Topp) pp. 201–228. (SSSA: Madison, WI, USA)
Hamza M, Anderson W (2003) Responses of soil properties and grain yields to deep ripping and gypsum application in a compacted loamy sand soil 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 soil contrasted with a sandy clay loam soil in Western Australia.Crossref | GoogleScholarGoogle Scholar |
Herrick JE, Jones TL (2002) A dynamic cone penetrometer for measuring soil penetration resistance. Soil Science Society of America Journal 66, 1320–1324.
| A dynamic cone penetrometer for measuring soil penetration resistance.Crossref | GoogleScholarGoogle Scholar |
Hill R (1990) Long-term conventional and no-tillage effects on selected soil physical properties. Soil Science Society of America Journal 54, 161–166.
| Long-term conventional and no-tillage effects on selected soil physical properties.Crossref | GoogleScholarGoogle Scholar |
Huang GB, Qiang C, Feng FX, Yu AZ (2012) Effects of different tillage systems on soil properties, root growth, grain yield, and water use efficiency of winter wheat Triticum aestivum L. in arid Northwest China. Journal of Integrative Agriculture 11, 1286–1296.
| Effects of different tillage systems on soil properties, root growth, grain yield, and water use efficiency of winter wheat Triticum aestivum L. in arid Northwest China.Crossref | GoogleScholarGoogle Scholar |
Hubbard RK, Strickland TC, Phatak S (2013) Effects of cover crop systems on soil physical properties and carbon/nitrogen relationships in the coastal plain of southeastern USA. Soil & Tillage Research 126, 276–283.
| Effects of cover crop systems on soil physical properties and carbon/nitrogen relationships in the coastal plain of southeastern USA.Crossref | GoogleScholarGoogle Scholar |
Ibrahim MA, Alhameid AH, Kumar S, Chintala R, Sexton P, Malo D, Schumacher T (2015) Long-term tillage and crop rotation impacts on a Northern Great Plains Mollisol. Advances in Crop Science and Technology 3, 178
Jabro JD, Iversen WM, Stevens WB, Evans RG, Mikha MM, Allen BL (2016) Physical and hydraulic properties of a sandy loam soil under zero, shallow and deep tillage practices. Soil & Tillage Research 159, 67–72.
| Physical and hydraulic properties of a sandy loam soil under zero, shallow and deep tillage practices.Crossref | GoogleScholarGoogle Scholar |
Jagadamma S, Lal R, Hoeft RG, Nafziger ED, Adee EA (2008) Nitrogen fertilization and cropping system impacts on soil properties and their relationship to crop yield in the central Corn Belt, USA. Soil & Tillage Research 98, 120–129.
| Nitrogen fertilization and cropping system impacts on soil properties and their relationship to crop yield in the central Corn Belt, USA.Crossref | GoogleScholarGoogle Scholar |
Janvier C, Villeneuve F, Alabouvette C, Edel-Hermann V, Mateille T, Steinberg C (2007) Soil health through soil disease suppression. which strategy from descriptors to indicators? Soil Biology & Biochemistry 39, 1–23.
| Soil health through soil disease suppression. which strategy from descriptors to indicators?Crossref | GoogleScholarGoogle Scholar |
Johnson DE (1998) ‘Applied multivariate methods for data analysts.’ (Duxbury Press: New York, USA)
Jury W, Gardner W, Gardner W (1991) ‘Soil physics.’ 5th edn. (John Wiley & Sons: New York, USA)
Kargas G, Kerkides P, Poulovassilis A (2012) Infiltration of rain water in semi-arid areas under three land surface treatments. Soil & Tillage Research 120, 15–24.
| Infiltration of rain water in semi-arid areas under three land surface treatments.Crossref | GoogleScholarGoogle Scholar |
Karlen DL, Hurley EG, Andrews SS, Cambardella CA, Meek DW, Duffy MD, Mallarino AP (2006) Crop rotation effects on soil quality at three northern corn/soybean belt locations. Agronomy Journal 98, 484–495.
| Crop rotation effects on soil quality at three northern corn/soybean belt locations.Crossref | GoogleScholarGoogle Scholar |
Karunatilake U, Van Es H (2002) Rainfall and tillage effects on soil structure after alfalfa conversion to maize on a clay loam soil in New York. Soil & Tillage Research 67, 135–146.
| Rainfall and tillage effects on soil structure after alfalfa conversion to maize on a clay loam soil in New York.Crossref | GoogleScholarGoogle Scholar |
Katsvairo T, Cox WJ, van Es H (2002) Tillage and rotation effects on soil physical characteristics. Agronomy Journal 94, 299–304.
| Tillage and rotation effects on soil physical characteristics.Crossref | GoogleScholarGoogle Scholar |
Klute A, Dirksen C (1986) Hydraulic conductivity and diffusivity: laboratory methods. In ‘Methods of soil analysis: Part 4 – Physical and mineralogical methods’ SSSA Book Series 5.1. (Ed. A Klute) pp. 687–734. (SSA, ASA: Madison, WI, USA)
Kumar S, Kadono A, Lal R, Dick W (2012a) Long-term no-till impacts on organic carbon and properties of two contrasting soils and corn yields in Ohio. Soil Science Society of America Journal 76, 1798–1809.
| Long-term no-till impacts on organic carbon and properties of two contrasting soils and corn yields in Ohio.Crossref | GoogleScholarGoogle Scholar |
Kumar S, Kadono A, Lal R, Dick W (2012b) Long-term tillage and crop rotations for 47–49 years influences hydrological properties of two soils in Ohio. Soil Science Society of America Journal 76, 2195–2207.
| Long-term tillage and crop rotations for 47–49 years influences hydrological properties of two soils in Ohio.Crossref | GoogleScholarGoogle Scholar |
Lal R, Mahboubi A, Fausey N (1994) Long-term tillage and rotation effects on properties of a central Ohio soil. Soil Science Society of America Journal 58, 517–522.
| Long-term tillage and rotation effects on properties of a central Ohio soil.Crossref | GoogleScholarGoogle Scholar |
Lampurlanés J, Cantero-Martinez C (2003) Soil bulk density and penetration resistance under different tillage and crop management systems and their relationship with barley root growth. Agronomy Journal 95, 526–536.
| Soil bulk density and penetration resistance under different tillage and crop management systems and their relationship with barley root growth.Crossref | GoogleScholarGoogle Scholar |
Lawal HM, Lawal A (2017) Pore size distribution and soil hydro physical properties under different tillage practices and cover crops in a Typic Haplusult in northern Nigeria. Tropical and Subtropical Agroecosystems 20, 111–129.
Lipiec J, Kuś J, Słowińska-Jurkiewicz A, Nosalewicz A (2006) Soil porosity and water infiltration as influenced by tillage methods. Soil & Tillage Research 89, 210–220.
| Soil porosity and water infiltration as influenced by tillage methods.Crossref | GoogleScholarGoogle Scholar |
López-Bellido L, Lopez-Bellido RJ, Castillo EJ, Lopez-Bellido FJ (2000) Effects of tillage, crop rotation, and nitrogen fertilization on wheat under rainfed Mediterranean conditions. Agronomy Journal 92, 1054–1063.
| Effects of tillage, crop rotation, and nitrogen fertilization on wheat under rainfed Mediterranean conditions.Crossref | GoogleScholarGoogle Scholar |
López-Fando C, Dorado J, Pardo MT (2007) Effects of zone-tillage in rotation with no-tillage on soil properties and crop yields in a semi-arid soil from central Spain. Soil & Tillage Research 95, 266–276.
| Effects of zone-tillage in rotation with no-tillage on soil properties and crop yields in a semi-arid soil from central Spain.Crossref | GoogleScholarGoogle Scholar |
Maiga A, Alhameid A, Singh S, Polat A, Singh J, Kumar S, Osborne S (2019) Responses of soil organic carbon, aggregate stability, carbon and nitrogen fractions to 15 and 24 years of no-till diversified crop rotations %J. Soil Research
| Responses of soil organic carbon, aggregate stability, carbon and nitrogen fractions to 15 and 24 years of no-till diversified crop rotations %J.Crossref | GoogleScholarGoogle Scholar |
Miller PR, McConkey BG, Clayton GW, Brandt SA, Staricka JA, Johnston AM, Lafond GP, Schatz BG, Baltensperger DD, Neill KE (2002) Pulse crop adaptation in the Northern Great Plains. Agronomy Journal 94, 261–272.
| Pulse crop adaptation in the Northern Great Plains.Crossref | GoogleScholarGoogle Scholar |
Novelli L, Caviglia O, Melchiori R (2011) Impact of soybean cropping frequency on soil carbon storage in Mollisols and Vertisols. Geoderma 167–168, 254–260.
| Impact of soybean cropping frequency on soil carbon storage in Mollisols and Vertisols.Crossref | GoogleScholarGoogle Scholar |
Osunbitan J, Oyedele D, Adekalu K (2005) Tillage effects on bulk density, hydraulic conductivity and strength of a loamy sand soil in southwestern Nigeria. Soil & Tillage Research 82, 57–64.
| Tillage effects on bulk density, hydraulic conductivity and strength of a loamy sand soil in southwestern Nigeria.Crossref | GoogleScholarGoogle Scholar |
Pagliai M, Raglione M, Panini T, Maletta M, La Marca M (1995) The structure of two alluvial soils in Italy after 10 years of conventional and minimum tillage. Soil & Tillage Research 34, 209–223.
| The structure of two alluvial soils in Italy after 10 years of conventional and minimum tillage.Crossref | GoogleScholarGoogle Scholar |
Pikul JL, Aase JK (1995) Infiltration and soil properties as affected by annual cropping in the Northern Great Plains. Agronomy Journal 87, 656–662.
| Infiltration and soil properties as affected by annual cropping in the Northern Great Plains.Crossref | GoogleScholarGoogle Scholar |
Pittelkow CM, Liang X, Linquist BA, Groenigen KJV, Lee J, Lundy ME, Gestel NV, Six J, Venterea RT, van Kessel C (2015) Productivity limits and potentials of the principles of conservation agriculture. Nature 517, 365–368.
| Productivity limits and potentials of the principles of conservation agriculture.Crossref | GoogleScholarGoogle Scholar | 25337882PubMed |
Rawls W, Pachepsky YA, Ritchie J, Sobecki T, Bloodworth H (2003) Effect of soil organic carbon on soil water retention. Geoderma 116, 61–76.
| Effect of soil organic carbon on soil water retention.Crossref | GoogleScholarGoogle Scholar |
Reynolds W, Elrick D, Youngs E (2002) Single-ring and double-or concentric-ring infiltrometers. In ‘Methods of soil analysis: Part 4 Physical methods’. SSSA Book Ser. 5.4. (Eds JH Dane, CG Topp) pp. 821–826. (SSSA: Madison, WI, USA)
Riedell WE, Osborne SL, Pikul JL (2013) Soil attributes, soybean mineral nutrition, and yield in diverse crop rotations under no-till conditions. Agronomy Journal 105, 1231–1236.
| Soil attributes, soybean mineral nutrition, and yield in diverse crop rotations under no-till conditions.Crossref | GoogleScholarGoogle Scholar |
Rühlmann J, Körschens M, Graefe J (2006) A new approach to calculate the particle density of soils considering properties of the soil organic matter and the mineral matrix. Geoderma 130, 272–283.
| A new approach to calculate the particle density of soils considering properties of the soil organic matter and the mineral matrix.Crossref | GoogleScholarGoogle Scholar |
Russell AE, Laird DA, Mallarino AP (2006) Nitrogen fertilization and cropping system impacts on soil quality in Midwestern Mollisols. Soil Science Society of America Journal 70, 249–255.
| Nitrogen fertilization and cropping system impacts on soil quality in Midwestern Mollisols.Crossref | GoogleScholarGoogle Scholar |
Sarwar G, Schmeisky H, Hussain N, Muhammad S, Ibrahim M, Safdar E (2008) Improvement of soil physical and chemical properties with compost application in rice-wheat cropping system. Pakistan Journal of Botany 40, 275–282.
SAS Institute 2013. ‘SAS user’s guide. Statistics’. (SAS Institute: Cary, NC, USA)
Scott B, Eberbach P, Evans J, Wade L (2012) Stubble retention in cropping systems in southern Australia. Benefits and challenges. EH Graham Centre Monograph No. 1. (Eds EH Clayton and HM Burns) (Industry & Investment NSW: Orange, NSW, Australia)
Sekwakwa O, Dikinya O (2012) Tillage-induced compaction. Effects on physical properties of agricultural loamy soils. Scientific Research and Essays 7, 1584–1591.
Shukla M, Lal R, Ebinger M (2003a) Tillage effects on physical and hydrological properties of a typic Argiaquoll in central Ohio. Soil Science 168, 802–811.
| Tillage effects on physical and hydrological properties of a typic Argiaquoll in central Ohio.Crossref | GoogleScholarGoogle Scholar |
Shukla M, Lal R, Owens L, Unkefer P (2003b) Land use and management impacts on structure and infiltration characteristics of soils in the North Appalachian region of Ohio. Soil Science 168, 167–177.
| Land use and management impacts on structure and infiltration characteristics of soils in the North Appalachian region of Ohio.Crossref | GoogleScholarGoogle Scholar |
Silburn D, Freebairn D, Rattray D (2007) Tillage and the environment in sub-tropical Australia tradeoffs and challenges. Soil & Tillage Research 97, 306–317.
| Tillage and the environment in sub-tropical Australia tradeoffs and challenges.Crossref | GoogleScholarGoogle Scholar |
Soracco CG, Lozano LA, Balbuena R, Ressia JM, Filgueira RR (2012) Contribution of macroporosity to water flux of a soil under different tillage systems. Revista Brasileira de Ciência do Solo 36, 1149–1156.
| Contribution of macroporosity to water flux of a soil under different tillage systems.Crossref | GoogleScholarGoogle Scholar |
Thierfelder C, Wall PC (2009) Effects of conservation agriculture techniques on infiltration and soil water content in Zambia and Zimbabwe. Soil & Tillage Research 105, 217–227.
| Effects of conservation agriculture techniques on infiltration and soil water content in Zambia and Zimbabwe.Crossref | GoogleScholarGoogle Scholar |
Tran Ba L, Le Van K, Van Elsacker S, Cornelis WM (2016) Effect of cropping system on physical properties of clay soil under intensive rice cultivation. Land Degradation & Development 27, 973–982.
| Effect of cropping system on physical properties of clay soil under intensive rice cultivation.Crossref | GoogleScholarGoogle Scholar |
Wani SA, Ali T, Sofi MN, Ramzan M, Hakeem KR (2016) An appraisal of conservation tillage on the soil physical properties. In ‘Soil science: agricultural and environmental prospectives’. (Eds K Hakeem, J Akhtar, M Sabir) pp. 1–22 (Springer: Switzerland)
West TO, Post WM (2002) Soil organic carbon sequestration rates by tillage and crop rotation. Soil Science Society of America Journal 66, 1930–1946.
| Soil organic carbon sequestration rates by tillage and crop rotation.Crossref | GoogleScholarGoogle Scholar |
Yang Z, Zhou L, Lv Y, Li H, Sun D, Yu M (2013) Soil aggregates features under different tillage systems in North China plain. Advanced Science Letters 19, 2761–2766.
| Soil aggregates features under different tillage systems in North China plain.Crossref | GoogleScholarGoogle Scholar |
Zhang B, Zhao Q, Horn R, Baumgartl T (2001) Shear strength of surface soil as affected by soil bulk density and soil water content. Soil & Tillage Research 59, 97–106.
| Shear strength of surface soil as affected by soil bulk density and soil water content.Crossref | GoogleScholarGoogle Scholar |