Long-term tillage effects on soil quality

Karlen, Douglas L.; Wollenhaupt, N. C.; Erbach, D. C.; Berry, E. C.; Swan, J. B.; Eash, Neal S.; Jordahl, James L.

doi:10.1016/0167-1987(94)00427-g

Cited by 278 publications

(151 citation statements)

References 17 publications

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“…However, there was no significant difference in BD among land uses. Although soils under AF land use contained SOC concentration twice more than that under RF, the detrimental effects of tillage may have offset the beneficial effects of SOC on BD [17,32]. Soils under AF land use also had the highest percentage of water stable aggregates (WSA) of 17.3%, but it was not significantly higher than that under IR and RF land uses.…”

Section: Soil Physical Quality Indicatorsmentioning

confidence: 97%

“…There are two baselines for "Optimum" curves, lower base line and upper base line, which corresponds to 0.5 score of the growth and death curves, respectively [12]. Using this non-linear scoring curve equation, three types of standardized scoring functions typically used for soil quality assessments were generated: (1): More is better"; (2) "Less is better"; and (3) "Optimum" as per earlier studies [12,[16][17][18]31,32]. The equation defines a "More is better" scoring curve for positive slopes, a "Less is better" curve for negative slopes, and an "Optimum" curve is defined by the combination of both positive and negative slopes.…”

Section: Soil Quality Assessmentmentioning

confidence: 99%

“…The equation defines a "More is better" scoring curve for positive slopes, a "Less is better" curve for negative slopes, and an "Optimum" curve is defined by the combination of both positive and negative slopes. These scoring curves are presented in detail by many authors [17,18,[31][32][33][34].…”

Section: Soil Quality Assessmentmentioning

confidence: 99%

“…However, the difference among land uses was not statistically significant. Similarly, the detrimental effects of tillage may have offset the beneficial effects of SOC on TP [17,32,37]. …”

Section: Soil Physical Quality Indicatorsmentioning

confidence: 99%

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Soil Quality Indices for Evaluating Smallholder Agricultural Land Uses in Northern Ethiopia

2015

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Population growth and increasing resource demands in Ethiopia are stressing and degrading agricultural landscapes. Most Ethiopian soils are already exhausted by several decades of over exploitation and mismanagement. Since many agricultural sustainability issues are related to soil quality, its assessment is very important. We determined integrated soil quality indices (SQI) within the surface 0-15 cm depth increment for three agricultural land uses: rain fed cultivation (RF); agroforestry (AF) and irrigated crop production (IR). Each land use was replicated five times within a semi-arid watershed in eastern Tigray, Northern Ethiopia. Using the framework suggested by Karlen and Stott (1994); four soil functions regarding soil's ability to: (1) accommodate water entry (WE); (2) facilitate water movement and availability (WMA); (3) resist degradation (RD); and (4) supply nutrients for plant growth (PNS) were estimated for each land use. The result revealed that AF affected all soil quality functions positively more than the other land uses. Furthermore, the four soil quality functions were integrated into an overall SQI; and the values for the three land uses were in the order: 0.58 (AF) > 0.51 (IR) > 0.47 (RF). The dominant soil properties influencing the integrated SQI values were soil organic carbon (26.4%); water stable aggregation (20.0%); total porosity (16.0%); total nitrogen (11.2%); microbial biomass carbon (6.4%); and cation exchange capacity (6.4%). Collectively, those six indicators accounted for more than 80% of the overall SQI values. OPEN ACCESSSustainability 2015, 7 2323

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Section: Soil Physical Quality Indicatorsmentioning

confidence: 97%

Section: Soil Quality Assessmentmentioning

confidence: 99%

Section: Soil Quality Assessmentmentioning

confidence: 99%

“…However, the difference among land uses was not statistically significant. Similarly, the detrimental effects of tillage may have offset the beneficial effects of SOC on TP [17,32,37]. …”

Section: Soil Physical Quality Indicatorsmentioning

confidence: 99%

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Soil Quality Indices for Evaluating Smallholder Agricultural Land Uses in Northern Ethiopia

2015

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“…The application of the soil quality indices indicated that the use of soil for agriculture caused a disturbance in its natural balance in the four different sites. Other authors verify that soil tillage and fertilisation caused an disequilibrium situation between organic matter content and other soil properties (Karlen et al, 1994;Hussian et al, 1999;Wander and Bollero, 1999;Zornoza et al, 2008).…”

Section: Discussionmentioning

confidence: 94%

Application of soil quality indices to assess the status of agricultural soils irrigated with treated wastewaters

et al. 2013

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Abstract. The supply of water is limited in some parts of the Mediterranean region, such as southeastern Spain. The use of treated wastewater for the irrigation of agricultural soils is an alternative to using better-quality water, especially in semi-arid regions. On the other hand, this practice can modify some soil properties, change their relationships and influence soil quality. In this work two soil quality indices were used to evaluate the effects of irrigation with treated wastewater in soils. The indices were developed studying different soil properties in undisturbed soils in SE Spain, and the relationships between soil parameters were established using multiple linear regressions. These indices represent the balance reached among properties in "steady state" soils. This study was carried out in four study sites from SE Spain irrigated with wastewater, including four study sites. The results showed slight changes in some soil properties as a consequence of irrigation with wastewater, the obtained levels not being dangerous for agricultural soils, and in some cases they could be considered as positive from an agronomical point of view. In one of the study sites, and as a consequence of the low quality wastewater used, a relevant increase in soil organic matter content was observed, as well as modifications in most of the soil properties. The application of soil quality indices indicated that all the soils of study sites are in a state of disequilibrium regarding the relationships between properties independent of the type of water used. However, there were no relevant differences in the soil quality indices between soils irrigated with wastewater with respect to their control sites for all except one of the sites, which corresponds to the site where low quality wastewater was used.

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Soil Quality: The Role of Microorganisms

Smith

2003

Encyclopedia of Environmental Microbiology

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Long-term tillage effects on soil quality

Cited by 278 publications

References 17 publications

Soil Quality Indices for Evaluating Smallholder Agricultural Land Uses in Northern Ethiopia

Soil Quality Indices for Evaluating Smallholder Agricultural Land Uses in Northern Ethiopia

Application of soil quality indices to assess the status of agricultural soils irrigated with treated wastewaters

Soil Quality: The Role of Microorganisms

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