scholarly journals Pengaruh Sifat Fisik Tanah terhadap Hama Simphylid Pada tanaman Nanas (Ananas comosus (L.) Merr) di PT. Great Giant Pineapple Terbanggi Besar Lampung Tengah

2017 ◽  
Vol 15 (3) ◽  
Author(s):  
Sandi Aji ◽  
Afandi Afandi ◽  
Lestari Wibowo ◽  
K.E.S. Manik
Keyword(s):  
Physical Properties ◽  
High Hardness ◽  
Soil Physical Properties ◽  
Soil Sampling ◽  
Soil Science ◽  
Ananas Comosus ◽  
Survey Method ◽  
Soil Pests ◽  
Poor Soil ◽  
Properties Of Soil

This research was conducted in the planting area of pineapple (Ananas comosus) PT. GGP Terbanggi Besar Central Lampung indicated attacked by pests simphylid in March 2014 until May 2014. Analysis of soil physical properties carried out in the Laboratory of Soil Science, Department of Agrotechnology, Faculty of Agriculture, University of Lampung. The method used in this study is a survey method. Soil sampling conducted at three locations indicated simphylid pests. Soil sampling done at some point and some depth. Results from this research that pest symphilid most numerous in one location with a number of acquisition 172 tail where the location of the physical properties of good land which the density value of the content is low, the total pore low, macropores and high hardness low ground , allowing sinphylid be able to live and thrive. While at the location of two and three with the condition density value of the content is high, the total pore high, macropores low, and violence high soil pests simphylid not so much discovered as simphylid can not multiply and survive on the physical condition of poor soil Keywords: Pineapple, Symphilid, and physical properties of soil

scholarly journals Diagnostic role of soil physical properties of forest biogeocoenoses of the Ukrainian steppe zone

2018 ◽  
Vol 29 (2) ◽  
Author(s):  
V. A. Gorban
Keyword(s):  
Physical Properties ◽  
Soil Properties ◽  
Granulometric Composition ◽  
Steppe Zone ◽  
Diagnostic Value ◽  
Soil Physical Properties ◽  
Soil Science ◽  
Pedotransfer Functions ◽  
Diagnostic Feature ◽  
Aggregate Composition

For the current stage of the development of soil science it is relevant to search for objectively existing interactions between the various soil properties. Solving this issue most appropriately should be based on the establishment of pedotransfer functions. Pedotransfer functions appeared at the time of the birth of quantitative soil science, when one of the properties of the soil tried to predict others when it became clear that everything in the soil is interrelated when it was established that there is a well-defined number of fundamental, basic properties of the soil, which is basically defines its other properties. Accordingly, the purpose of our work is to establish the diagnostic value of the individual soil physical properties of forest biogeocoenoses of the steppe by means of determining the existing interconnections between them and other properties and characteristics of these soils. The solution of this issue is one of the tasks of developing research on the soil physical properties of forest biogeocoenoses of the Ukrainian steppe zone. The diagnostic value of granulometric and structural-aggregate composition, density and permeability for determining the general state of soils due to the existence of certain interactions between the indicated parameters and other soil properties is considered. The granulometric composition is a fundamental soil characteristic that determines not only the physical state, but also all the main soil properties and regimes of forest biogeocoenoses of the Ukrainian steppe zone. The structural and aggregate composition is an important complex diagnostic feature of chernozem, which helps to reveal the peculiarities of their genesis under the influence of forest vegetation, in particular as a result of changes in the content and composition of organic matter, exchange cations, the influence of root vegetation systems, etc. The soil density, due to existing interactions with other soil properties, is an important diagnostic feature that reflects the features of their genesis and regimes, which determines the specificity of the ecological functions of the soils of forest biogeocoenoses of the Ukrainian steppe zone. Water permeability can be considered as a complex characteristic of soils, which to a certain extent reflects their granulometric composition, porosity, structural and aggregate composition, determines the features of the water-air regime. The differences of physical properties of zonal chernozems and chernozems, the genesis of which are connected with artificial and natural forest biogeocoenoses within the steppe zone of Ukraine, are analyzed. The relevance of the further search for relationships between physical indicators that are easily and promptly analyzed, and other soil properties for expanding diagnostic possibilities with respect to their genesis is pointed out.

scholarly journals The Effects of Enclosing Cultivated Land on the Physical Properties of Soil in the Loess Hill Region of Ordos

2016 ◽  
Vol 18 (3) ◽  
pp. 1-14
Author(s):  
Lin Wang ◽  
Fengna Xue ◽  
Wenbang Gao ◽  
Jing Shi ◽  
Shanshan Sun ◽  
...  
Keyword(s):  
Physical Properties ◽  
Soil Moisture Content ◽  
Soil Bulk Density ◽  
Soil Physical Properties ◽  
Ecological Systems ◽  
Cultivated Land ◽  
Short Term ◽  
Native Flora ◽  
Hill Region ◽  
Properties Of Soil

Abstract Protection of the environment by returning farmland to forest and grassland through enclosing areas of land to permit regeneration of native flora is being implemented in the Loess hill region of China. Soil physical properties are important components of ecological systems, as comparisons between cultivated and enclosed areas demonstrate. The results showed: the soil moisture content in the enclosed area was 14.6% and that in the cultivated area was 14%; the soil bulk density and soil porosity were respectively 1.45 g/cm3 and 45.28% in the enclosed areas, and respectively 1.46 g/cm3 and 44.79% in cultivated land. The alteration of soil physical properties was not big between cultivated areas and enclosed areas in the short term.

scholarly journals Soils and Fertilizers for Master Gardeners: Soil Physical Properties

EDIS ◽  
2009 ◽  
Vol 2009 (1) ◽  
Author(s):  
Amy L. Shober
Keyword(s):  
Physical Properties ◽  
Soil Physical Properties ◽  
Fact Sheet ◽  
Water Science ◽  
Soil And Water ◽  
Properties Of Soil

Revised! SL268, a 4-page illustrated fact sheet by Amy L. Shober, is part of series entitled Soils and Fertilizers for Master Gardeners. It describes some of the basic physical properties of soil. Includes reference. Published by the UF Department of Soil and Water Science, January 2009.

scholarly journals Variability of physical properties of soil and rice grown under cover crops in crop-livestock integrated system

Bragantia ◽  
2017 ◽  
Vol 76 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Rodrigo Gonçalves Trevisan ◽  
Onã da Silva Freddi ◽  
Flávio Jesus Wruck ◽  
Renan Rimoldi Tavanti ◽  
Fernanda Salles Cunha Peres
Keyword(s):  
Physical Properties ◽  
Cover Crops ◽  
Production Systems ◽  
Rice Yield ◽  
Upland Rice ◽  
Total Porosity ◽  
Soil Physical Properties ◽  
Integrated System ◽  
Mato Grosso ◽  
Properties Of Soil

ABSTRACT The production systems of upland rice culture in Mato Grosso are not consolidated yet while the effects of soil physical properties and their correlation with rice yield in crop-livestock integrated systems are not defined as well. Therefore, this study determined the spatial variability of physical properties of soil and rice cultivated in no-tillage system under different cover crops, using principal components analysis and geostatistics. The experiment was conducted in Santa Carmen, northern Mato Grosso. A regular grid with 100 sample points distributed in an area of 26,400 m2 was installed. Soil and rice samples were collected to determine rice variables and soil physical properties. The average rice yield was 1.70 Mg∙ha−1, ranging from 0.70 to 3.12 Mg∙ha−1. The highest yields were observed in consortium with cowpea and brachiaria and were associated with lower incidence of grain spots, despite higher soil density and penetration resistance. The consortium with brachiaria, crotalaria, and sudangrass had lower yields, which was associated with higher incidence of grain spots, despite higher soil macroporosity and total porosity.

Grazing effects on soil physical properties and the consequences for pastures: a review

2001 ◽  
Vol 41 (8) ◽  
pp. 1231 ◽  
Author(s):  
K. L. Greenwood ◽  
B. M. McKenzie
Keyword(s):  
Physical Properties ◽  
Soil Compaction ◽  
Soil Physical Properties ◽  
Grazing Management ◽  
Soil Conditions ◽  
Physical Conditions ◽  
Grazed Pasture ◽  
Grazing Systems ◽  
Physical Degradation ◽  
Poor Soil

Grazing animals exert pressure on the ground comparable to that of agricultural machinery. As a result, soil under pasture can be compacted. In grazing systems based on permanent pastures or rangelands, there is little opportunity to ameliorate poor soil physical conditions through tillage. Hence, it is important to understand the effects of grazing on soil physical properties and the consequent effects of these properties on pasture growth and composition. Most soils under grazed pasture, even those managed to minimise soil physical degradation, will be compacted to some extent. However, the magnitude of this compaction is usually small, and limited to the upper 50–150 mm of the soil. Compaction to greater depth, and other changes in soil physical properties, are more likely in recently tilled or wet soils. The response of pasture to the poorer soil conditions caused by grazing is difficult to determine, but it is likely to be small compared with the defoliation effects of grazing. Maintenance of a vigorous pasture should be a major aim of grazing management and would also achieve the secondary aim of maintaining acceptable soil physical conditions.

scholarly journals Pengaruh Waktu Pemeraman Dengan Penambahan Kapur Sebagai Bahan Additve Pada Tanah Lempung Ekspansif Terhadap Nilai CBR Tanah

2019 ◽  
Vol 3 (2) ◽  
pp. 97
Author(s):  
Bahtiar Efendi Situmorang ◽  
Melloukey Ardan
Keyword(s):  
Physical Properties ◽  
Strong Support ◽  
Essential Element ◽  
Soil Physical Properties ◽  
California Bearing Ratio ◽  
Curing Time ◽  
Soil Stabilisation ◽  
Soil Clays ◽  
Under Construction ◽  
Properties Of Soil

<p><em>The soil is an essential element of a structure under construction so that the soil should have a good carrying capacity. But the fact the field is found soil that has the low bearing capacity, so it is necessary to conduct soil stabilisation with lime. The study aims to determine the percentage that is effective in adding lime and the effect of adding lime to the soil physical properties change in terms of the value of CBR (California Bearing Ratio) to the long curing time. This research was conducted in the laboratory, by testing the physical properties of soil and the strong support of land (CBR) with the addition of lime variation of 1%, 3%, and 5% by long curing 0, 4, 7 and 14 days. Tests were conducted with two treatments, soil samples were cured first and then compacted and samples were pressed first and brooded. The result is the value of CBR.</em><em> %. From the results of the value of the California Bearing Ratio can be seen that the addition of sand quarsa on soil clays showed an increase in the value of the California Bearing Ratio in soil clays.</em></p>

scholarly journals Kajian Sifat Fisika Tanah pada Lahan Budidaya Sub DAS Krueng Jreu Kabupaten Aceh Besar

2020 ◽  
Vol 4 (2) ◽  
pp. 457-463
Author(s):  
Fatimah Aulia Silalahi ◽  
Zainabun Zainabun ◽  
Hairul Basri
Keyword(s):  
Physical Properties ◽  
Soil Analysis ◽  
Development Planning ◽  
Organic Content ◽  
Soil Survey ◽  
Survey Method ◽  
Soil Infiltration ◽  
Silty Loam ◽  
Land Cultivation ◽  
Properties Of Soil

Kajian Sifat Fisika Tanah pada Lahan Budidaya Sub DAS Krueng Jreu Kabupaten Aceh BesarAbstrak. Penelitian ini bertujuan untuk mengetahui nilai karakteristik sifat fisika tanah lahan budidaya pada Sub DAS Krueng Jreu Kabupaten Aceh Besar. Informasi ini dapat berguna sebagai bahan pertimbangan bagi pengelola dalam menyusun perencanaan pembangunan daerah setempat yang sesuai dengan karakteristik fisik DAS. Metode penelitian ini menggunakan metode survei deskriptif, dengan cara survei tanah dan pengamatan langsung di lokasi penelitian kemudian dilanjutkan dengan pengambilan sampel tanah untuk analisis tanah di laboratorium. Pengambilan sampel penelitian di peroleh dari overlay peta lereng, peta penggunaan lahan, dan peta jenis tanah pada lahan budidaya Sub DAS Krueng Jreu sehingga diperoleh 9 titik sampel. Hasil penelitian menunjukan tekstur tanah liat berdebu, lempung dan lempung berdebu, bobot isi tanah sangat tinggi, porositas buruk, permeabilitas lambat sampai sangat lambat, laju infiltrasi lambat, dan kandungan C-organik rendah sampai sangat rendah.Kata kunci: Sifat Fisika Tanah, InfiltrasiStudy on Soil Physical on Land Cultivation of Sub Watershed Krueng Jreu Aceh Besar DistrictAbstract. This research aims to know the value of characteristic physical properties of soil on land cultivation of Sub Watershed Krueng Jreu Aceh Besar District. The information can be useful as consideration for the organizer in drawing up local regional development planning which corresponds to the physical characteristics of watershed. The research of methodology by using descriptive survey method, by means of soil survey and observation on site research was continued by sampling the soil for soil analysis in the laboratory. The sample of the research in overlay map obtained from a slope, land use map, and a map of soil types on land cultivation Sub Watershed Krueng Jreu so total samples are 9 points. The results of the research showed the texture are sandy clay loam, loam and silty loam, soil weight is very high, bad porocity, permeability is slow until very slow, the rate of infiltration is slow, and the C-organic content is low until very low.Key words: Physical Properties of Soil, Infiltration

scholarly journals KAJIAN SIFAT FISIKA TANAH DAS SUMPUR BAGIAN HULU KABUPATEN TANAH DATAR

Jurnal Solum ◽  
2007 ◽  
Vol 4 (1) ◽  
pp. 18
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Asmar Asmar ◽  
Aulia Rahman
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Soil Texture ◽  
Rice Field ◽  
Soil Physical Properties ◽  
Survey Method ◽  
Water Drainage ◽  
West Sumatra ◽  
Area Survey ◽  
The Impact

A research about study of soil physical properties in upper part of Sumpur Watershed in Tanah Datar Regency, West Sumatra was conducted in 2005.  The objective of the research was to supply information about soil physical properties in the upper part of Sumpur watershed.  These data are important to predict the erosion that can happen in that area and the impact to the surrounding area.  Survey method with purposive random sampling was employed to this research for sampling soil in the field.  Soil was sampled from each land use randomly.  There were four types of land use found in the area, those were forest, mixed wood, annual season crops, and rice field.  Based on field observation it was found that  there were two classes of soils there, Andisols and Inceptisols.  The results of laboratory analyses showed that soil texture in Andisols was silt loam, it was the same for each land use.  Soil texture in Inceptisols, however, was finer than that in Andisols, it was clay.  Bulk volume and total pores of both Andisol and Inceptisol for each land use were not yet different from those in the forest land use.  Then, the value for plant available water, drainage pores, and water retaining pores in each land use for both soils were still comparable to those in forest and use.   However, soil organic carbon (OC) content tended to decrease as land use change from forest to mixed wood, annual season crops, and rice field at both soils except for mixed wood land use in Inceptisol.  The soil OC in that land use was slightly higer than that in the forest.  Key Words: land use, soil OC, soil physical properties

REYNOLDS 390 and A390

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Hardness ◽  
Heat Treating ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Temperature Performance

Abstract REYNOLDS 390 and A390 are hypereutectic aluminum-silicon alloys having excellent wear resistance coupled with good mechanical properties, high hardness, and low coefficients of expansion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-203. Producer or source: Reynolds Metals Company.

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