Effect of forage cropping treatments on soil structure and relationships with fractal dimensions

Gülser, Çoşkun

doi:10.1016/j.geoderma.2005.03.004

Cited by 75 publications

(55 citation statements)

References 38 publications

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“…Soil water retention at PWP in the higher suction range (> 1500 kPa) is due to adsorption rather than capillarity, and is influenced less by the structure and more by the texture and specific surface area of the soil particles. However, soil water retention at FC in the lower tension range is structure dependent (Gardner 1968;Taylor 1983;Weil and Magdoff 2004). In the current study, it is possible that the different C:N ratios in the organic wastes induced different levels of microbial activity that in turn influenced the aggregation and structure, and therefore the different water retention at FC and PWP of the loamy sand soil.…”

Section: Effects Of Organic Waste Application On Soil Hydraulic Propementioning

confidence: 99%

Effects of agricultural wastes on the hydraulic properties of a loamy sand cropland in Turkey

Gülser

Candemir

2015

Soil Science and Plant Nutrition

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This study was carried out to determine the proper amount of application for manure (M), hazelnut husk (Corylus avellane L.) (HH), tobacco (Nicotiana tabacum L.) (TO) and tea (Camellia Sinensis (L.)) (TE) wastes based on hydraulic property improvement of a loamy sand cropland in Turkey. The effects of agricultural wastes on field capacity (FC), permanent wilting point (PWP), available water content (AWC), relative saturation (RS) and initial infiltration rate (IR) were determined for a loamy sand soil 7 months after agricultural wastes were incorporated to 15 cm soil depth at four different rates (0, 2%, 4% and 6%, weight:weight) in a randomized plot design experiment with three replicates. While increases in soil OM content for the M application rates were generally lower, TE and HH treatments including high organic carbon (OC) contents resulted in high soil organic matter (OM) increases. Organic wastes generally increased the values of soil hydraulic properties, with increased aggregate stability (AS) and total porosity (F) and reduced bulk density (BD). The highest AS and F values were obtained with 6% HH and 6% TE applications, respectively. Due to different mineralization rates of the organic wastes attributable to their carbon: nitrogen (C:N) ratios, the same application rate had different effects on the soil's hydraulic properties. Manure, having the lowest C:N ratio, generally had a lower effect on AS and BD. Increased IR due to increases in AS and F by the agricultural waste treatment, especially at 4 and 6% HH, reduced the AW content to 15 cm compared with 2% HH. This indicates that the significant application of higher C:N ratio wastes is not suitable in terms of AW, due to significant improvement of IR. While the highest FC (17.3%) and AWC (10.7%) values were found in the 6% TE application, the highest PWP (7.2%) and IR (333.4 cm h −1 ) were in the 6% TO and 6% HH applications, respectively. To improve soil physical and hydraulic properties, 6% TO and M, 4% TE and 2% HH applications are suggested for loamy sand cropland.

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Section: Effects Of Organic Waste Application On Soil Hydraulic Propementioning

confidence: 99%

Effects of agricultural wastes on the hydraulic properties of a loamy sand cropland in Turkey

Gülser

Candemir

2015

Soil Science and Plant Nutrition

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“…For mass fractals such as soil aggregates, the methods to measure aggregate ρ i are not precise (Logsdon, 1995) and introduce error when calculating bulk density-size relationships (Anderson et al, 1998). Total C and polysaccharide contents of aggregates that were reported to vary with cropping systems (Martins et al, 2009) may affect the bulk densities of similar-sized aggregates (Gülser, 2006). On the other hand, tillage disrupts soil aggregates and usually leads to increased decomposition of soil organic matter compounds because of reduced physical protection (Bronik and Lal, 2005;Six et al, 2004).…”

Section: Soil Aggregates As Fractal Objectsmentioning

confidence: 99%

“…For example, one might consider investigating correlations between each aggregate size fraction and bulk density of the arable layer for the 7 crop treatments presented in Table 1. Soil bulk densities in the top layer (0-0.15 m) varied as follows: 1.37 g cm − 3 for RG, 1.31 g cm − 3 for AL, 1.28 g cm − 3 for BG, 1.29 g cm − 3 for SB, 1.28 g cm − 3 for SC, 1.29 g cm − 3 for CV, and 1.45 g cm − 3 for FC (Gülser, 2006).…”

Section: Spurious Correlations Caused By Scale Dependencymentioning

confidence: 99%

“…Correlations become scale-dependent (total mass vs. mass of macro-aggregates as the scale of measurement) and spurious (coefficients differed for the same sieve-size fraction). This Table 1 Raw data for mass fractions in Gülser (2006) emphasizes the fact that compositional data must be analyzed using ratios rather than raw proportions to maintain scale invariance and sub-compositional coherence in the compositional vector.…”

Section: Spurious Correlations Caused By Scale Dependencymentioning

confidence: 99%

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Compositional analysis for an unbiased measure of soil aggregation

Parent

Almeida²,

Hernandes³

et al. 2012

Geoderma

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“…This also proved the well known protective function of grasses against soil erosion. Such effect of forages in improving aggregate stability and organic carbon content of a clay soil was shown by Gülser (2006). Available phosphorus content differed among the three groups of soils.…”

Section: Discussionmentioning

confidence: 93%

Enzyme activity of Chromic Luvisols under different degree of erosion and land use

Nedyalkova

Donkova

Deribeeva

2017

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 14.03.2016 Accepted : 06.06.2016 Soil erosion is a serious environmental problem and a threat to the sustainable agriculture production. Little information is available on enzyme activities of eroded soils in Bulgaria, especially on their relations to the degree of erosion and soil properties. In this work, slightly, moderately and severely eroded Chromic Luvisols under different land use (pasture, crop field and virgin) were studied. Enzyme activities (invertase, catalase and phosphatase), total nitrogen, total carbon, available phosphorus contents and soil particle distribution were determined and possible relations between them were examined. Data showed that enzyme activities tended to lower with increasing the degree of erosion. This was better pronounced for invertase and phosphatase in pasture and virgin soils. Depending on land use, all enzyme activities decreased in the order pasture > virgin > crop field soils, showing positive impact of soil cover and negative effect of cultivation practices. Soil invertase and phosphatase activities were in close relations with soil carbon content. The activities of catalase and phosphatase correlated positively with soil clay. Invertase only was in positive relation with soil silt and in negative relation with the sand content. Data obtained are intended to contribute to development of biological indicators of eroded soils.

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Effect of forage cropping treatments on soil structure and relationships with fractal dimensions

Cited by 75 publications

References 38 publications

Effects of agricultural wastes on the hydraulic properties of a loamy sand cropland in Turkey

Effects of agricultural wastes on the hydraulic properties of a loamy sand cropland in Turkey

Compositional analysis for an unbiased measure of soil aggregation

Enzyme activity of Chromic Luvisols under different degree of erosion and land use

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