scholarly journals Impact of Effective Microorganisms (EM) Application on the Physical Condition of Haplic Luvisol

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1049 ◽  
Author(s):  
Jacek Pranagal ◽  
Sławomir Ligęza ◽  
Halina Smal
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Physical Condition ◽  
Total Porosity ◽  
Organic Carbon Content ◽  
Effective Microorganisms ◽  
Water Capacity ◽  
Water Stable Aggregates ◽  
Water Stable Aggregate ◽  
Stable Aggregate

The study set out to determine changes in the soil air-water properties, the water-stable aggregate share and organic carbon content as effects of a five-year application of effective microorganisms (EM-A). The hypothesis that long-term applied EM-A biopreparations have a positive effect on the soil physical condition has not been confirmed. Haplic Luvisols originating from silt were studied in a field experiment after EM-A biopreparation treatment. The soil samples with the natural structure preserved intact were collected three times each year. The properties of the soil determined in the study were: particle density, total organic carbon content, bulk density, total porosity, air capacity, air permeability, soil moisture at sampling, field water capacity, available water content, unavailable water content, and water-stable aggregate content. The ratio of field water capacity and total porosity (FC/TP) was calculated. It was found that EM-A application primarily leads to a decrease in the content of organic carbon and water-stable aggregates. This was an adverse effect. Total organic carbon (TOC) and water-stable aggregates proved to be very sensitive indicators for assessing the soil physical condition. However, changes in soil compaction and air–water properties did not show significant deterioration. Our research addresses the data gaps about EM application to soil.

scholarly journals The long-term performance of composited soil with feldspathic sandstone amendment on sandy soil and its effects on corn yield

2019 ◽  
Vol 65 (No. 8) ◽  
pp. 395-400
Author(s):  
cheng jie ◽  
han jichang ◽  
xie jichang ◽  
wang huanyuan ◽  
sun zenghui ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Sandy Soil ◽  
Corn Yield ◽  
Organic Carbon Content ◽  
Water Stable Aggregate ◽  
Long Term Performance ◽  
Term Performance ◽  
Feldspathic Sandstone

To estimate the long-term performance and the optimal ratio of feldspathic sandstone with sandy soil, experiments with different ratios of feldspathic sandstone to sandy soil (0:1, 1:1, 1:2 and 1:5 v/v) was conducted. The physical properties as soil texture, water-stable aggregate (WR0.25) content, and the organic carbon content of the composited soil for 6 years, and corn yield for 9 years were determined. Our results showed that after the addition of feldspathic sandstone: (1) soil texture was notably improved, changing from sand loamy soil (1:2 and 1:5) to sand loam soil (1:1) and silt sand soil (1:1) over planting time; (2) content of water-stable aggregate (WR0.25) significantly increased: WR0.25 of treatments 1:1, 1:2 and 1:5 all increased (by 29.26, 31.47 and 11.56%, respectively) compared with that of treatment 0:1; (3) the organic carbon content of the composited soils increased with time in all treatments. After six years of planting, average organic carbon content in treatments 1:1, 1:2 and 1:5 were 1.64, 1.51 and 1.77 g/kg, respectively, which were higher than that of 0:1 treatment; and (4) among the three ratios, treatment 1:2 (12 984 kg/ha) had the highest corn yield, followed by treatment 1:1 (12 040 kg/ha) and 1:5 (11 301 kg/ha). In conclusion, with a good performance, 1:2 was the best ratio of feldspathic sandstone to sand in improving the sandy soil structure of the Mu Us Desert, China.

scholarly journals Compost and Wildflowers for the Management of Urban Derelict Soils

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Roberto Pini ◽  
Francesca Bretzel ◽  
Enzo Sparvoli ◽  
Beatrice Pezzarossa ◽  
Manuele Scatena
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Water Movement ◽  
Aggregate Stability ◽  
Total Porosity ◽  
Individual Species ◽  
Organic Carbon Content ◽  
Entire Area ◽  
Treated Soil ◽  
The Individual

The aim of this study was to verify whether the use of source-separated municipal waste compost could improve the physical quality of urban soils and create better conditions for their management when planted with herbaceous species. A sandy soil in traffic islands was tilled to a depth of 10 cm, and half of the surface was treated with compost (3 kg/m2). A mixture of 25 herbaceous annuals was then sown in the entire area. Organic carbon content and physical characteristics were determined at different times in the soil treated and not treated with compost. The vegetation was monitored in terms of its growth and flowering. The compost-treated soil showed an increase in organic carbon content. Total porosity increased with time in the compost-treated soil, due to a higher volume of transmission pores, which play a role in water movement. Soil aggregate stability also improved in the compost-treated soil. The duration of flowering of the individual species and the overall quantity of flowers were greater in the compost-treated soil.

A global analysis of the impact of zero‐tillage on soil physical condition, organic carbon content, and plant root response

2020 ◽  
Vol 31 (5) ◽  
pp. 557-567 ◽  
Author(s):  
Surajit Mondal ◽  
Debashis Chakraborty ◽  
Kalikinkar Bandyopadhyay ◽  
Pramila Aggarwal ◽  
Dharamvir Singh Rana
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Physical Condition ◽  
Global Analysis ◽  
Plant Root ◽  
Organic Carbon Content ◽  
Zero Tillage ◽  
Root Response ◽  
The Impact

scholarly journals S-Index as an indicator of physical quality in soils of the Paraná state

2018 ◽  
Vol 22 (7) ◽  
pp. 458-464
Author(s):  
João H. Caviglione
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Bulk Density ◽  
Pearson Correlation ◽  
Total Porosity ◽  
Wilcoxon Test ◽  
Native Forest ◽  
Organic Carbon Content ◽  
Physical Quality ◽  
Soil Physical Quality

ABSTRACT From the 1990s, the demand for soil quality indicators has increased with the agricultural sustainability approaches. The S-index was proposed as an indicator of soil physical quality. The objective was to evaluate the sensitivity of S-index as an indicator of soil physical quality and its correlation with bulk density, organic carbon content, macroporosity, microporosity, total porosity and clay, sand and silt contents, under field conditions in the diversity of the Paraná state. Samples were collected from 21 sites with textures from clay and heavy clay, in the layers of 0-0.1 and 0.1-0.2 m, in soil under native forest and in cultivated soil. Eight soil physical attributes were determined. A soil-water retention curve with six moisture points was fitted and the S-index was calculated for each condition. The Wilcoxon Test showed differences in S-index between soil managements with p-value = 0.0015 in the 0-0.1 m layer and less than 0.0001 in the 0.1-0.2 m layer. The observed S-index showed to be a sensitive indicator of soil physical quality and with a significant Pearson correlation with bulk density (‑0.826), macroporosity (0.760), total porosity (0.836), and organic carbon content (0.583).

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