Changes in soil organic carbon in a clay loam soil following ploughing and reseeding of permanent grassland under temperate moist climatic conditions

2013 ◽  
Vol 69 (4) ◽  
pp. 611-624 ◽  
Author(s):  
M. Necpálová ◽  
D. Li ◽  
G. Lanigan ◽  
I. A. Casey ◽  
W. Burchill ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Climatic Conditions ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Permanent Grassland ◽  
Loam Soil

Managing organic carbon of sandy clay loam soil with organic amendments to promote particle aggregation

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Haroon Shahzad ◽  
Muhammad Iqbal ◽  
Noman Latif ◽  
Muhammad Arshad Khan ◽  
Qudrat Ullah Khan
Keyword(s):  
Organic Carbon ◽  
Organic Amendments ◽  
Particle Aggregation ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Loam Soil

Nitrogen accretion and other soil changes in Tindall clay loam under Townsville stylo/grass pastures

1976 ◽  
Vol 16 (78) ◽  
pp. 94 ◽  
Author(s):  
RJK Myers
Keyword(s):  
Organic Carbon ◽  
Available Phosphorus ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Available Nitrogen ◽  
Absolute Value ◽  
Stylosanthes Humilis ◽  
Loam Soil ◽  
Townsville Stylo ◽  
Soil Changes

Soil changes after 3-15 years of fertilized leguminous pastures on Tindall clay loam soil at Katherine, N.T. were studied by comparison of leguminous pasture soils with their native counterparts. Soil organic carbon, total nitrogen, C/N ratio and pH were unchanged by the presence of Townsville stylo (Stylosanthes humilis). Available phosphorus (bicarbonate extraction) was significantly higher under legume pasture, reflecting its fertilizer history, but there was no pattern of increase with time, nor with quantity of fertilizer. Available nitrogen (boiling water extraction) was higher under legume pasture, and both the absolute value under legume pasture and the change in amount were correlated significantly with the age of the pasture. Available nitrogen after three years of legume pasture was equal to that under unimproved pasture, suggesting that gains in this period merely balanced losses during clearing and establishment.

scholarly journals Short-term legacy effects of feedlot manure amendments on water-extractable organic carbon in a clay loam soil profile

2019 ◽  
Vol 99 (1) ◽  
pp. 36-45 ◽  
Author(s):  
J.J. Miller ◽  
M.L. Owen ◽  
X. Hao ◽  
C.F. Drury ◽  
D.S. Chanasyk
Keyword(s):  
Organic Carbon ◽  
Soil Profile ◽  
Land Application ◽  
Legacy Effects ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Leaching Potential ◽  
Water Extractable Organic Carbon ◽  
Loam Soil ◽  
Water Extractable

Limited research exists on legacy effects of land application of feedlot manure on accumulation, redistribution, and leaching potential of water-extractable organic carbon (WEOC) in soil profiles. We sampled a clay loam soil at six depths (0–1.50 m) 2 yr after the last application (2014) of 17 continuous annual manure applications (since 1998). The amendment treatments were stockpiled (SM) or composted (CM) feedlot manure containing straw (ST) or wood-chip (WD) bedding at three application rates (13, 39, and 77 Mg ha−1dry basis). There was also an unamended control (CON) and inorganic fertilizer (IN) treatment. The soil samples were analyzed for concentrations of WEOC. The total mass or accumulation of WEOC in the soil profile was greater (P ≤ 0.05) by 1.2–3.3 times for the CM-ST-77 treatment than 12 of 14 other treatments, and it was significantly greater for amended than CON or IN treatments. The total WEOC mass was 14%–20% greater for CM-ST than CM-WD, SM-ST, and SM-WD treatments, and it was 16%–22% greater for CM than SM at the 39 and 77 Mg ha−1rates. The 77 Mg ha−1rate of the four manure type-bedding treatments had the significantly greatest (by 37%–527%) concentrations of WEOC at the six depths compared with other treatments, suggesting greater redistribution and leaching potential. Significant manure effects occurred on soil WEOC 2 yr after the manure was last applied following 17 continuous applications, and it indicated an increased risk of leaching potential at the higher application rate.

Short-term Effects of Tillage Practices on Organic Carbon in Clay Loam Soil of Northeast China

Pedosphere ◽  
2007 ◽  
Vol 17 (5) ◽  
pp. 619-623 ◽  
Author(s):  
Ai-Zhen LIANG ◽  
Xiao-Ping ZHANG ◽  
Hua-Jun FANG ◽  
Xue-Ming YANG ◽  
C.F. Drury
Keyword(s):  
Organic Carbon ◽  
Northeast China ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Short Term ◽  
Tillage Practices ◽  
Loam Soil ◽  
Short Term Effects

Predicting soil organic carbon and total nitrogen using mid- and near-infrared spectra for Brookston clay loam soil in Southwestern Ontario, Canada

2011 ◽  
Vol 91 (1) ◽  
pp. 53-63 ◽  
Author(s):  
H. T. Xie ◽  
X. M. Yang ◽  
C. F. Drury ◽  
J. Y. Yang ◽  
X. D. Zhang
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Infrared Spectra ◽  
Management Practices ◽  
Near Infrared ◽  
C:N Ratio ◽  
Clay Loam ◽  
Near Infrared Spectra ◽  
Loam Soil

Xie, H. T., Yang, X. M., Drury, C. F., Yang, J. Y. and Zhang, X. D. 2011. Predicting soil organic carbon and total nitrogen using mid- and near-infrared spectra for Brookston clay loam soil in Southwestern Ontario, Canada. Can. J. Soil Sci. 91: 53–63. Mid-infrared (MIR) and near-infrared (NIR) spectroscopy of soils have been tested to estimate soil organic carbon (SOC) and total N (TN) concentrations at local, regional and national scales. However, these methods have rarely been used to assess SOC and TN concentrations of the same soil under different management practices. The objective of this study was to determine if models developed from infrared spectra of Brookston clay loam soils under different management practices could be used to estimate SOC, and TN concentrations and the C:N ratio. Soils used for model calibration included 217 samples from a long-term fertilization and crop rotation study and a long-term compost study, whereas 78 soil samples from a long-term tillage study on the same soil type were used for model validation. Soil organic carbon and TN concentrations of all samples were also analyzed using dry combustion techniques. Soil samples were scanned from 4000 to 400 cm−1 (2500–25 000 nm) for MIR spectra and from 8000 to 4000 cm−1 (1250–2500 nm) for NIR spectra. Partial least squares regression (PLSR) analysis was used for the calibration dataset to build prediction models for SOC, TN and C:N ratio. The SOC and TN concentrations determined using dry combustion techniques were compared with the prediction from the models using the calibration datasets. The predictions of SOC and TN concentrations by the PLSR method using infrared spectra were statistically sound, with high coefficient of determination with the calibration dataset (R2cal, SOCMIR=0.99 and SOCNIR=0.97, TNMIR=0.98 and TNNIR=0.97) and the validation dataset (R2val, SOCMIR=0.96 and SOCNIR=0.95, TNMIR=0.96 and TNNIR=0.95) and low root mean square error (RMSEPcal, SOCMIR=0.93 and SOCNIR=1.60, TNMIR=0.08 and TNNIR=0.12; RMSEPval, SOCMIR=1.40 and SOCNIR=1.75, TNMIR=0.11 and TNNIR=0.12). The predictions of SOC and TN concentrations in the 5 to 30 cm depth were better than the predictions for either the surface (0 to 5 cm) soils or for soils from lower depths (>30 cm). The models could be used as an alternative method for determining SOC and TN concentrations of Brookston clay loam soils; however, larger sample populations and improved model algorithms could further improve predictions.

scholarly journals The impact of tillage practices on the distribution of humified organic carbon in clay loam soil

2021 ◽  
Vol 108 (1) ◽  
pp. 11-18
Author(s):  
Inga Liaudanskiene ◽  
Tomas Zukaitis ◽  
Aleksandras Velykis ◽  
Antanas Satkus ◽  
Irmantas Parasotas
Keyword(s):  
Organic Carbon ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Tillage Practices ◽  
Loam Soil ◽  
The Impact
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