Lime application in marshlands of Northern Germany—Influence of liming on the physicochemical and hydraulic properties of clayey soils

Frank, Tina; Zimmermann, Iris; Horn, Rainer

doi:10.1016/j.still.2020.104730

Cited by 9 publications

(6 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We found no studies that directly investigated the influence of Ca(NO 3 ) 2 addition on soil structure. While calcium is considered an important driver for microaggregation (Pihlap et al, 2021;Totsche et al, 2018), its overall effect on the VSD has been found to be limited even with the addition of far larger amounts than practiced in the long-term field site at Ultuna (Frank et al, 2020;Mamedov et al, 2021). Frank et al (2020) noted that regular tillage can undermine the effects of liming on the pore space and that fine-textured soils require considerable amounts of lime for effects to be visible.…”

Section: Discussionmentioning

confidence: 99%

Relative entropy as an index of soil structure

Klöffel

Jarvis

Yoon

et al. 2022

European J Soil Science

View full text Add to dashboard Cite

Soil structure controls key soil functions in both natural and agro-ecosystems. Thus, numerous attempts have been made to develop methods aiming at its characterization. Here we propose an index of soil structure that uses relative entropy to quantify differences in the porosity and pore(void)-size distribution (VSD) between a structured soil derived from soil water retention data and the same soil without structure (a so-called reference soil) estimated from its particle-size distribution (PSD). The difference between these VSDs, which is the result of soil structure, is quantified using the Kullback-Leibler Divergence (KL divergence). We applied the method to soil data from two Swedish field experiments that investigate the long-term effects of soil management (fallow vs. inorganic fertilizer vs. manure) and land use (afforested land vs. agricultural land dominated by grass/clover ley) on soil properties. The KL divergence was larger for the soil receiving regular addition of manure compared with the soils receiving no organic amendments. Furthermore, soils under afforested land showed significantly larger KL divergences compared to agricultural soils near the soil surface, but smaller KL divergences in deeper soil layers, which closely mirrored the distribution of organic matter in the soil profile. Indeed, a significant positive correlation (r = 0.374, p < 0.001) was found between soil organic carbon concentrations and KL divergences across all sites and treatments.Despite challenges related to modelling the VSD of the reference soil without structure, the proposed index proved useful for evaluating differences in soil structure in response to soil management and land-use change and reflected the expected effects of soil organic matter on soil structure. We conclude that relative entropy shows great potential to serve as an easy-to-use index of soil structure, as it only requires widely available data on soil physical and hydraulic properties. Highlights• A new index of soil structure is proposed based on relative entropy • A method is developed that separates the effects of soil texture and structure on the pore space

show abstract

Section: Discussionmentioning

confidence: 99%

Relative entropy as an index of soil structure

Klöffel

Jarvis

Yoon

et al. 2022

European J Soil Science

View full text Add to dashboard Cite

show abstract

“…Liming also affects soil physical conditions in clay soils (Holland et al 2018) with different soil physical changes reported in the literature. Agricultural lime (CaCO 3 ) has been found to decrease bulk density and increase pore continuity (Frank et al 2020), and has also been found to decrease soil penetration resistance and increase hydraulic conductivity (Kirkham et al 2007). However, Frank et al (2019) found that soil physical improvements, such as increased plant-available water capacity, recorded 6 months after liming were absent 12 months after liming, when the soil structure collapsed after soil tillage by ploughing and chiselling.…”

Section: Introductionmentioning

confidence: 99%

Soil characteristics and tillage can predict the effect of ‘structure lime’ on soil aggregate stability

2022

View full text Add to dashboard Cite

Context. In Sweden, mixtures of 80-85% ground limestone and 15-20% slaked lime (hereafter, 'structure lime') are used in subsidised environmental schemes to improve aggregate stability and mitigate phosphorus losses on clay soils. Aims. This study investigated different rates of structure lime application and soil variables on aggregate stability on clay soils, and whether soil properties can predict aggregate stability following structure liming. Methods. Increasing application rates of 0-16 t ha −1 of structure lime (SL0, SL4, SL8 and SL16) were tested in 30 field trials in Sweden. Soil aggregates (2-5 mm) were collected 1 year after liming and subjected to two rainfall events in a rain simulator. Key results. Leachate turbidity after the second simulated rainfall event decreased significantly (13% and 20%, respectively, in SL8 and SL16) compared with SL0, indicating improved aggregate stability. There was a near-significant interaction (P = 0.056) between treatment and trial. Grouping by initial pH ðH 2 OÞ (range 6.2-8.3), clay content (10-61%), soil organic matter content (SOM, 2.2-7.1) and clay mineralogy (SmV index, 0.2-3.8) revealed different effects on turbidity. Discriminant analysis of soil characteristics and four tillage variables correctly classified the outcome for 27 of the 30 trial sites. Conclusions. Results show that structure liming can improve aggregate stability 1 year after liming, and can thereby prevent particulate P losses from soils with high clay and SOM content, low SmV index and low initial pH. The discriminant analysis also showed the importance of tillage for the outcome of structure liming. Implications. Clay soil characteristics such as SOM and pH significantly affected aggregrate stability after structure liming.

show abstract

“…The study area was divided into 48 individual experimental plots and every plot had a size of 6 x 18 m, arranged in a Randomized Complete Block Design with four replicates per treatment. The field was managed conventionally with annual tillage and mineral nitrogen fertilization (Frank et al, 2020). Sampling of the 12 undisturbed soil blocks (1 dm³) took place in April 2019 (32 months after lime application) from the topsoil layer (0-10 cm) of the Lime0, Lime1 and Lime1.5 plots (Frank et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…The field was managed conventionally with annual tillage and mineral nitrogen fertilization (Frank et al, 2020). Sampling of the 12 undisturbed soil blocks (1 dm³) took place in April 2019 (32 months after lime application) from the topsoil layer (0-10 cm) of the Lime0, Lime1 and Lime1.5 plots (Frank et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…The marshland soils on the west coast in Schleswig-Holstein are often called "minute soils", because of the high risk of irreversible compaction, and only short time slots of trafficability during the field season are available. "Minute soils" with very high clay contents contain mainly fine pores that can hold a lot of water but have a tendency not to release it again (Frank et al, 2020;Schroeder, 1968). In the field sites studied, it is necessary to improve the stability of the soils in order to further improve their trafficability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation