scholarly journals Biomass Productivity of Different Winter Cover Crops and Their Effect on Soil Physical Properties

2020 ◽  
Vol 12 (10) ◽  
pp. 338
Author(s):  
Willian dos Reis ◽  
Monica C. Sustakowski ◽  
Edleusa P. Seidel ◽  
Maria do C. Lana ◽  
Renata F. Barabasz ◽  
...  
Keyword(s):  
Cover Crops ◽  
Dry Matter ◽  
Soil Aggregates ◽  
Geometric Mean ◽  
Weighted Average ◽  
Biomass Productivity ◽  
Total Porosity ◽  
Average Diameter ◽  
Soil Density ◽  
Common Vetch

The cultivation of cover crops is a vegetative practice considered an alternative for sustainable soil management, due to its beneficial action in different aspects of soil properties. Thus, the present work aimed to evaluate the effect of cultivation of different species of cover crops on soil density, porosity and diameter of soil aggregates. The experimental design was in randomized blocks, with four replications. The treatments consisted of four species of winter green manure: black oat, forage turnip, forage pea, and common vetch, a consortium of black oat + forage turnip and area kept fallow (control). The following evaluations were performed: dry matter production of cover crops, macroporosity, microporosity, total porosity, soil density, geometric mean diameter and weighted average diameter. The cultivation with forage turnip and the consortium of black oat + forage turnip presented higher dry matter productivity, decreased soil density, increased soil porosity, improved the distribution in relation to macropores and aggregate stability.

scholarly journals Fast immersion to test the stability of aggregates in water: consequences for interpreting results from tropical soil classes

2019 ◽  
Vol 42 ◽  
pp. e42453
Author(s):  
Rodrigo Fonseca da Silva ◽  
Patriciani Estela Cipriano ◽  
Matias Siueia Junior ◽  
Geslin Mars ◽  
Moacir de Souza Dias Junior
Keyword(s):  
Soil Aggregates ◽  
Geometric Mean ◽  
Weighted Average ◽  
Aggregate Stability ◽  
Stability Index ◽  
Average Diameter ◽  
Tropical Soils ◽  
Organic Carbon Content ◽  
Pre Treatment ◽  
High Organic Carbon Content

Aggregates are the primary structural components of soil and have been used as an indicator of soil quality in conservation systems. The objective of this study was to analyse the effect of slow pre-wetting on the results of the aggregate stability test for different classes of tropical soils. Data were arranged in a 2 x 4 factorial design with three replications, in which the first factor comprised the two methods of pre-treatment on soil aggregates: without pre-wetting (WOPW), which considered the moisture of the aggregates in the field, and with pre-wetting (WPW), which considered the slow wetting of aggregates through capillarity on wet filter paper for 24h. The second factor consisted of four soil classes: Typic Dystrustept (Cambissolo Aplico distrófico in Embrapa), Typic Hapludult (Argissolo Amarelo distrófico), Rhodic Kandiudult (Nitossolo Vermelho distrófico), and Anionic Acrudox (Latossolo Vermelho distróferrico) and considered horizons A and B. The pre-wetting significantly increased the values of the weighted average diameter, geometric mean diameter and aggregate stability index. In soils with high organic carbon content, the practice of pre-moistening did not provide variation in aggregation.

scholarly journals Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load

2008 ◽  
Vol 32 (3) ◽  
pp. 921-932 ◽  
Author(s):  
Sérgio Ricardo da Silva ◽  
Nairam Félix de Barros ◽  
Liovando Marciano da Costa ◽  
Fernando Palha Leite
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Compaction ◽  
Dry Matter ◽  
Geometric Mean ◽  
Tree Height ◽  
Total Porosity ◽  
Infiltration Rate ◽  
Traffic Intensity ◽  
Number Of Passes

During timber exploitation in forest stands harvesting machines pass repeatedly along the same track and can cause soil compaction, which leads to soil erosion and restricted tree root growth. The level of soil compaction depends on the number of passes and weight of the wood load. This paper aimed to evaluate soil compaction and eucalyptus growth as affected by the number of passes and wood load of a forwarder. The study was carried out in Santa Maria de Itabira county, Minas Gerais State - Brazil, on a seven-year-old eucalyptus stand planted on an Oxisol. The trees were felled by chainsaw and manually removed. Plots of 144 m² (four rows 12 m long in a 3 x 2 m spacing) were then marked off for the conduction of two trials. The first tested the traffic intensity of a forwarder which weighed 11,900 kg and carried 12 m³ wood (density of 480 kg m-3) and passed 2, 4, and 8 times along the same track. In the second trial, the forwarder carried loads of 4, 8, and 12 m³ of wood, and the machine was driven four times along the same track. In each plot, the passes affected four rows. Eucalyptus was planted in 30 x 30 x 30 cm holes on the compacted tracks. The soil in the area is clayey (470 clay and 440 g kg-1 sand content) and at depths of 0-5 cm and 5-10 cm, respectively, soil organic carbon was 406 and 272 g kg-1 and the moisture content during the trial 248 and 249 g kg-1. These layers were assessed for soil bulk density and water-stable aggregates. The infiltration rate was measured by a cylinder infiltrometer. After 441 days the measurements were repeated, with additional analyses of: soil organic carbon, total nitrogen, N-NH4+, N-NO3-, porosity, and penetration resistance. Tree height, stem diameter, and stem dry matter were measured. Forwarder traffic increased soil compaction, resistance to penetration and microporosity while it reduced the geometric mean diameter, total porosity, macroporosity and infiltration rate. Stem dry matter yield and tree height were not affected by soil compaction. Two passes of the forwarder were enough to cause the disturbances at the highest levels. The compaction effects were still persistent 441 days after forwarder traffic.

FEATURES OF USING A GROUND LASER PROFILER TO ASSESS THE QUALITY OF SOIL CULTIVATION ON AGRICULTURAL SLOPE LANDSCAPES

2021 ◽  
pp. 16-23
Author(s):  
SERGEY A. VASILIEV ◽  
◽  
VIKTOR А. ALEKSEEV ◽  
MIKHAIL A. VASILIEV ◽  
ALEKSEI A. VASILIEV ◽  
...  
Keyword(s):  
Catchment Area ◽  
Soil Aggregates ◽  
Weighted Average ◽  
Software Tool ◽  
Average Diameter ◽  
Surface Slope ◽  
Cultivated Soil ◽  
Chuvash Republic ◽  
Equal Height

The authors analyze an extensive set of data for measuring the daily surface profi le of the cultivated soil to assess its agrotechnical parameters. The research was carried out on a small agricultural catchment area of the Orininsky rural settlement, which is located in the Morgaushy district of the Chuvash Republic. Three agricultural fi elds were selected, ranging from 25 ha to 53 ha. The studied areas were cultivated in various ways: plowing with harrowing, disking the soil and winter plowing. The profi les of the studied elementary sections were measured using a developed ground-based circular laser profi lometer. Data on the state of the profi le were used to determine the main agrotechnical parameters - clumping, cloddiness, surface slope, and deviation of the travel trajectory of a machine and tractor unit from the line of equal height. A software tool for processing and analyzing data received from sensors has been developed. The results established that the deviation of the projection of the greatest elevation line changes (measured by the slope) from the travel trajectory of a unit with an angle of 62, a slope of 6.5, and in a quantitative size distribution soil aggregates of 1…4 inches in diameter prevail. The weighted average diameter of the clods was 3.99 cm. The research results have determined the use of recommend methods for stating the agrotechnical parameters of the daylight surface to evaluate the cultivated soil in accordance with agrotechnical requirements.

Residual Dry Matter, Weeds and Soil Aggregates after Winter Cover Crop

2019 ◽  
pp. 1-11
Author(s):  
Edleusa Pereira Seidel ◽  
João Henrique Silva Caetano ◽  
Arthur Schafer Karpinski ◽  
Willian Dos Reis
Keyword(s):  
Crop Rotation ◽  
Cover Crops ◽  
Cover Crop ◽  
Soil Aggregates ◽  
Block Design ◽  
Aggregate Stability ◽  
Dry Mass ◽  
No Tillage ◽  
Common Vetch ◽  
Winter Cover

Soil quality maintenance in a no-tillage system (NTS) depends on cover crops. They are essential for crop rotation, affect several soil attributes, and contribute to phytosanitary control. However, cover crop efficacy is influenced by their root function and the presence of plant straw on soil surfaces. The objective of this study was to compare various winter cover crops in terms of their effects on dry mass yield, straw persistence after 40 d, weed incidence, and soil aggregate stability. The soil tested was an Oxisol Ustox Hapludox in Western Paraná State, southern Brazil. A randomized block design was used with four replicates and six treatments (fallow, black oat, fodder turnip, field pea, common vetch, and fodder turnip + black oat). Cover crops were managed 88 d after sowing. Dry mass (DM) and residual dry mass (RDM) were measured at 20 d and 40 d after harvest. Aggregate stability and weed type and density were evaluated after 40 d of management (DAM). The results showed that black oat obtained the lowest decomposition; therefore, a potential species to be used in the system of crop rotation in the no-tillage. The consorted of fodder turnip and black oat provided relatively higher dry mass yields and improved soil aggregation. Cover crops reduced the incidence of weeds, being important for no-till sustainability.

scholarly journals Effect of Soil Preparation and Layers on the Weighted Mean Diameter and Geometric Mean Diameter of a Red Distroferric Latosol

2019 ◽  
pp. 1-5
Author(s):  
Pedro Silvério Xavier Pereira ◽  
Aloisio Bianchini ◽  
Márcio William Roque ◽  
Antônio Renan Berchol da Silva ◽  
Fábio Kempim Pittelkow ◽  
...  
Keyword(s):  
Geometric Mean ◽  
Weighted Average ◽  
Average Diameter ◽  
Weighted Mean ◽  
Physical Conditions ◽  
Mean Diameter ◽  
Soil Preparation ◽  
Physical Attributes ◽  
Irrigated Wheat ◽  
The City

The objective of this work was to study the influence of three management systems on the physical attributes and productivity of irrigated wheat, cultivar BRS-254, in the city of Tangara da Serra, MT.  The soil physical attributes were: weighted mean diameter (DMP) and geometric mean diameter (DMG).  The experimental design was in randomized blocks. The treatments for weighted average diameter (WMD) and geometric mean diameter (DMG) were arranged in a subdivided plot scheme, with eight replications. The tilting preparations obtained the highest DMPs compared to SD both in the 0-10 cm layer and in the 10-20 cm layer, a result possibly related to the incorporation of residues during the soil preparation associated with higher mucilage production promoted by higher activity of the root system of the crop, which found better soil physical conditions for its development. The PC presented a reduction in DMP when comparing the value in the 0-10 cm layer with the value in the 10-20 cm layer. The significant effect of soil preparation on DMG can also be a result of the incorporation of residues during the preparation, associated to the effect of higher root volume promoted by the higher root growth of the crop in these preparations, which, in turn, guarantee greater production of mucilages promoting greater soil aggregation and higher DMG. The use of the disk grid in the PC and PM interferes with the soil attributes. Soil inversion provided higher WMD and DMG.

Aggregation index, carbon, nitrogen, and natural abundance of 13C and 15N in soil aggregates and bulk soil cultivated with onion under crop successions and rotations

Soil Research ◽  
2020 ◽  
Vol 58 (7) ◽  
pp. 622
Author(s):  
Lucas Dupont Giumbelli ◽  
Arcângelo Loss ◽  
Barbara Santos Ventura ◽  
Elano dos Santos Junior ◽  
Janaine Almeida ◽  
...  
Keyword(s):  
Plant Diversity ◽  
Cover Crops ◽  
Soil Cover ◽  
Soil Aggregates ◽  
Geometric Mean ◽  
Bulk Soil ◽  
Velvet Bean ◽  
Organic C ◽  
Tillage System ◽  
C And N

Use of soil cover crops of different families in crop rotation or succession under no-tillage system (NTS) for onion production results in higher soil quality compared to land use systems with less plant diversity. The objective was to evaluate the effect of using different combinations of plant species from different botanical families in rotation and succession of soil cover crops in NTS for onion production on formation of macroaggregates, mesoaggregates, and microaggregates, and on total organic C (TOC) and N (TN) contents, including isotopic forms of C and N, in soil aggregates and bulk soil. The treatments (T) evaluated were maize/onion (NTS-T1); cover plants (winter)/onion (NTS-T2); maize/winter grasses/onion (NTS-T3); velvet bean/onion (NTS-T4); millet/cover plants (winter)/onion (NTS-T5); velvet bean/rye/onion (NTS-T6); maize/onion in conventional tillage system (CTS-T7); and intercrop cover plants (summer)/onion (NTS-T8). We evaluated macroaggregates (8.0–0.25 mm), microaggregates (<0.25 mm), and bulk soil (<2.0 mm) at depths of 0–5, 5–10, and 10–20 cm, in a nine-year field experiment. The greater plant diversity in T2–T6 and T8 resulted in higher geometric mean diameter (GMD) of aggregates compared to T1 and T7. The T8 was more efficient in increasing GMD in the 10–20 cm soil depth than the other treatments. The T1 was more efficient in improving the evaluated soil physical and chemical attributes than T7. The use of NTS with plants of the Poaceae and Fabaceae families in single or intercrop systems for onion production resulted in higher TOC and TN contents in the 0–5 and 5–10 cm soil depths compared to CTS. Isotope 15N measurements showed that C and N were more protected in microaggregates in all evaluated treatments and depths compared to macroaggregates and bulk soil. Macroaggregates had more TOC and TN than microaggregates.

scholarly journals Aggregation Index in Representative Soils of the Paraiba State

2021 ◽  
Vol 9 (7) ◽  
pp. 266-281
Author(s):  
Petrus Luiz de Luna Pequeno ◽  
Flávio Pereida de Oliveira ◽  
Viviane Barrozo da Silva ◽  
Antonio Carlos Duarte Ricciotti ◽  
Jairo André Schlindwein ◽  
...  
Keyword(s):  
Soil Aggregates ◽  
Weighted Average ◽  
Stability Index ◽  
Average Diameter ◽  
Soil Samples ◽  
Chemical Parameters ◽  
Aggregation Index ◽  
Soil Class ◽  
The Stability ◽  
Wet Sieving

The stability of soil aggregates is an important physical parameter as it mainly influences the flow of water and air in the soil. In this sence, the research aimed to determine the stability aggregates index in six representative soil classes in the Paraíba State-Brazil at different stages of pedological development. The soil classes analyzed is localized on the Microregions of the Curimataú Occidental (Ferrasol, Planosol, Leptosol, Arenosol) and Brejo Paraibano (Acrisol, Lixisol), on the Paraíba state, Brazil. At depths of 0-5 cm, 5-10 cm and 10-20 cm was collected three undeformed soil samples were collected per mini trench (one per depth), making a total of 15 samples per soil class and 90 total samples.  In each soil class was analysed: chemical parameters, granulometrics parameters, stability of agregates,  Weighted average diameter via wet sieving (DMPAu) and Weighted average diameter via dry sieving (DMPAs); agregate stability index (IEA). For the conditions that research was developed can conclude that: The IEA values tended to increase with clay contents in all soil classes; Among the less developed soils, the IEA values were better in the  Planosol soil, denoting that there is a probable relationship with the low contents of K, Na and Al; In the more developed soils, the high values of Na and Al may have contributed to the lower IEA in the PVd, while the lower values may have contributed to the higher IEA in Ferrasol and Lixisol soils.

scholarly journals Physical properties of a rhodic haplustox under two sugarcane harvesting systems

2010 ◽  
Vol 34 (6) ◽  
pp. 1803-1809 ◽  
Author(s):  
Walquíria Machado ◽  
Tiago Santos Telles ◽  
João Tavares Filho ◽  
Maria de Fátima Guimarães ◽  
Grace Bungenstab Alves ◽  
...  
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Weighted Average ◽  
Aggregate Stability ◽  
Total Porosity ◽  
Average Diameter ◽  
Penetration Resistance ◽  
Soil Bulk Density ◽  
Native Forest ◽  
Harvesting Systems

This study had the purpose of evaluating the effects of two management types of sugarcane: harvesting of burnt cane (BCH) and mechanized harvesting of unburnt green cane (MCH), on some soil physical properties of a dystrophic Rhodic Haplustox. The data were then compared with results for the same soil type under native forest. A completely randomized design was used, with three treatments and 20 replications. The following characteristics were determined: organic matter, aggregate stability, soil bulk density, and porosity at depths of 0-0.20 m and soil penetration resistance. After 15 years of cultivation, there were some alterations in the soil under cane burnt before harvesting, evidenced by a drop in the weighted average diameter of stable aggregates in water and increased soil bulk density. Significant changes were also detected in total porosity and pore distribution under both harvesting systems. Critical values for penetration resistance were observed in the area under mechanized sugar cane harvesting, with a value of 4.5 MPa in the 40-55 cm layer. This value is considered high and could indicate compaction and restriction of root growth. Soil properties under the green cane (unburned) management system were closest to those of the soil under native forest.

scholarly journals Cover crops, lime and gypsum influence on soil physical attributes

2021 ◽  
Vol 37 ◽  
pp. e37010
Author(s):  
Marcela Pacola Oliveira ◽  
Cassiano Garcia Roque ◽  
Gabriel Luis Piati ◽  
Rita de Cassia Felix Alvarez ◽  
Marco Antonio Camilo de Carvalho ◽  
...  
Keyword(s):  
Cover Crops ◽  
Pennisetum Glaucum ◽  
Residual Effect ◽  
Total Porosity ◽  
Penetration Resistance ◽  
Soil Density ◽  
Tillage System ◽  
Physical Attributes ◽  
Lime Application ◽  
Gypsum Application

Cover crops promote nutrient cycling, and lime and gypsum can alter the soil physical attributes. This study aimed to evaluate the effect of lime and gypsum rates applied to a no-tillage system with addition of residues of three cover crops on the soil physical attributes. This experiment was carried out in chapadão do sul-ms. The treatments were comprised of three cover crops (Urochloa ruziziensis, fallow, and Pennisetum glaucum), with gypsum (0, 2.3 and 4.6 Mg ha-1) and lime applied at a dose of 0, 2, 4, 6 Mg ha-1).The attributes evaluated were: soil density, macroporosity, microporosity, total porosity and penetration resistance. The soil of the experiment was classified an Oxisol.  Cover crops and lime and gypsum improved macroporosity, microporosity and total porosity at all depths, 0-0.2 m. Millet presented lower values for penetration resistance with the lime application and without gypsum application. No residual effect on soil density was detected for lime and gypsum application or cover crops in the 0.1-0.2 m layer. Brazilian Cerrado producers will have a well-defined management system to follow aiming at improving the soil physical attributes.

Potensi Covercrop Kebun Sawit Sebagai Sumber Pakan Hijauan Ternak Ruminansia Pada Musim Kemarau di Pelalawan, Riau

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Ruslan A. Gopar ◽  
S. Martono ◽  
Muhamad N. Rofiq ◽  
Windu N.
Keyword(s):  
Cover Crops ◽  
Oil Palm ◽  
Dry Matter ◽  
Sampling Method ◽  
Dry Season ◽  
Forage Production ◽  
Destructive Sampling ◽  
Matter Production ◽  
Ruminant Animals ◽  
Line Intercept

The objective of this experiment was to obtain forage/ cover crops productivity and carrying capacity for ruminant animals in Pelalawan Regency, Riau in the dry season. Data were collected from civil palm oil plantations at the aged 7, 10 and 14 years in the end of dry season with a destructive sampling method. Sampling used line intercept method which every hectare were picked 10 points by using a pair of 1 m2 sized quadrant. The result showed that the number of vegetations/ cover crops in oil palm plantations aged 7, 10 and 14 years was 42 types.The proportion of forage which consist grass, legume and ferns was diverse at each age of oil palm plantations. Forage production under oil palm plantations aged 7, 10 and 14 years were 2,571 kg/ha, 1479.76 kg/ha and 1417.22 kg/ha as fed and amounted to 811.41 kg/ ha, 471, 15 kg/ ha and 456.91 kg/ ha in the dry matter production. Average carrying capacities of oil palm plantations aged 7, 10 and 14 years was 0.36 Animal units (AU)/ha/year, 0.21 AU/ha/year and 0.20 AU/ ha/year.Penelitian ini bertujuan untuk mengetahui potensi jumlah covercrop dan kapasitas tampungnya di kebun sawit sebagai sumber pakan hijauan ruminansia pada musim kemarau di kabupaten Pelalawan, Riau. Pengambilan data dilakukan di perkebunan kelapa sawit yang berumur 7, 10 dan 14 tahun milik rakyat pada akhir musim kemarau. Pengambilan sampel dengan destructive sampling method menggunakan metode garis berpetak memakai kuadran berukuran 1m2 dengan jumlah sampel tiap area sebanyak 10 titik. Berdasar hasil pengukuran diperoleh hasil jumlah vegetasi/ covercrop yang ada di kebun sawit berumur 7, 10 dan 14 tahun sebanyak 42 jenis yang bervariasi tiap umur tanaman sawit. Proporsi hijauan yang ada meliputi jenis rumput, legume dan paku-pakuan bervariasi pada tiap umur kebun sawit. Produksi hijauan yang ada di bawah kebun sawit berumur 7, 10 dan 14 tahun berturut-turut 2.571 kg/ha, 1.479,76 kg/ha dan 1.417,22 kg/ha dalam bentuk segar serta sebesar 811,41 kg/ha, 471,15 kg/ha dan 456,91 kg/ha dalam bahan kering. Kapasitas tampung dari kebun sawit berumur 7, 10 dan 14 tahun adalah 0,36 satuan ternak (ST)/ha, 0,21 ST/ha dan 0,20 ST/ha.Keywords: cover crops, oil palm plantation, forage, ruminant, dry season, Pelalawan

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