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

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. %. 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.

Download Full-text

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

Jurnal Penelitian Pertanian Terapan ◽

10.25181/jppt.v15i3.134 ◽

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

Download Full-text

Application of Machine Learning Techniques to Estimate Unsoaked California Bearing Ratio in Ekiti Central Senatorial District

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2021/v40i3531571 ◽

2021 ◽

pp. 30-37

Author(s):

Akinwamide Joshua Tunbosun ◽

Jacob Odeh Ehiorobo ◽

Osuji Sylvester Obinna ◽

Ebuka Nwankwo

Keyword(s):

Machine Learning ◽

Physical Properties ◽

Information Criterion ◽

Soil Physical Properties ◽

Least Square ◽

California Bearing Ratio ◽

Machine Learning Techniques ◽

Single Node ◽

Error Metrics ◽

Learning Techniques

This paper investigates the relationship between soil physical properties and the Un-soaked California Bearing Ratio (USCBR) of soil found in Ekiti State Central Senatorial District (ESCSD), which includes Natural Moisture Content (NMC%) Percentage Fines, Specific Gravity (SG) and Consistency Limits (LL%, PL%, & PI %). The database was prepared in the laboratory by conducting tests on ninety-nine (99) soil samples which were obtained in a burrowed pit found in the Central Senatorial District of Ekiti State. An R version 4.0.5 and R studio version 1.2.5033 was used to analyze the Artificial Neural Networks (ANNs) and Least Square Regression (LSR) in order to develop a simplified CBR model. In both models, independent layer containing six nodes (soil physical properties) and the dependent layer containing a single node (i.e. CBR) were taken. The descriptive analysis for training and testing was performed; boxplots of the variables were plotted and; sensitivity analysis was carried out. The capacity of the developed equation was evaluated in terms of error metrics MSE and RMSE. The analysis showed that both ANN and MLR models predicted CBR close to the laboratory value. However, the model without the percentage passing sieve 200 (MIC) is the best, having Akaike Information Criterion and Bayesian Information Criterion values of 614.1707 and 627.5754 respectively, from the error metrics analysis, the results showed that PL and LL are the most influential variable that affects the developed CBR model's output. From the foregoing its concluded that the study has shown a relationship between the CBR value of Ekiti Central Senatorial District soil and its basic soils properties using machine learning techniques, also the developed CBR model will be useful tool to Civil engineers, geotechnical engineers and construction industry within the study area particularly in their preliminary stage of their project.

Download Full-text

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

Transylvanian Review of Systematical and Ecological Research ◽

10.1515/trser-2015-0090 ◽

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.

Download Full-text

Soils and Fertilizers for Master Gardeners: Soil Physical Properties

EDIS ◽

10.32473/edis-mg451-2009 ◽

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.

Download Full-text

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

Bragantia ◽

10.1590/1678-4499.596 ◽

2017 ◽

Vol 76 (1) ◽

pp. 145-154 ◽

Cited By ~ 2

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.

Download Full-text

Changes in the Physical Properties of Soil Clays Due to Precipitated Aluminum and Iron Hydroxides: I. Swelling and Aggregate Stability After Drying

Soil Science Society of America Journal ◽

10.2136/sssaj1975.03615995003900060016x ◽

1975 ◽

Vol 39 (6) ◽

pp. 1056-1063 ◽

Cited By ~ 64

Author(s):

S. A. El-Swaify ◽

W. W. Emerson

Keyword(s):

Physical Properties ◽

Aggregate Stability ◽

Iron Hydroxides ◽

Soil Clays ◽

Properties Of Soil

Download Full-text

Changes in the Physical Properties of Soil Clays due to Precipitated Aluminum and Iron Hydroxides: II. Colloidal Interactions in the Absence of Drying

Soil Science Society of America Journal ◽

10.2136/sssaj1976.03615995004000040021x ◽

1976 ◽

Vol 40 (4) ◽

pp. 516-520 ◽

Cited By ~ 20

Author(s):

S. A. El-Swaify

Keyword(s):

Physical Properties ◽

Iron Hydroxides ◽

Colloidal Interactions ◽

Soil Clays ◽

Properties Of Soil

Download Full-text

ANALYZED SOIL IMPROVEMENT BASED GYPSUM AND CEMENT IN SOIL CLAY

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i12.2019.295 ◽

2020 ◽

Vol 7 (12) ◽

pp. 12-19

Author(s):

Nuril Mahda Rangkuti

Keyword(s):

Physical Properties ◽

Carrying Capacity ◽

Clay Soil ◽

Soil Improvement ◽

Soil Samples ◽

California Bearing Ratio ◽

Curing Time ◽

Sample Testing ◽

Soil Clay ◽

Physical Changes

Land is an important element of the structure underneath a construction, so that the soil must have a good carrying capacity. But the reality on the ground is that many soils have low carrying capacity, so it is necessary to stabilize the soil with gypsum and cement. This study aims to determine the effective percentage of gypsum and cement addition and the effect of the addition of Gypsum and Cement to physical changes in clay soil in terms of the CBR (California Bearing Ratio) value of the curing time. This research was conducted in the laboratory, by testing the physical properties of the soil and the carrying capacity of the soil (CBR) with variations in the addition of gypsum and cement by 1%, 3%, and 5% with a long curing time of 1, 7, and 14 days . Sample testing is carried out with two treatments, namely soil samples are first cured and then compacted and the sample is solidified first and then cured. From the research results obtained the largest CBR (California Bearing Ratio) value occurs in the variation of the addition of Gypsum and Cement 5% with the length of time for soil specimens to be compacted first before curing is equal to 41.54%, this is due to the mixture of soil with gypsum and cement has been manjai solid before the collection can occur, the cavities between soil particles also become solid, so that the strength also increases. From the California Bearing Ratio results, it can be seen that the addition of gypsum and cement to clay soil shows an increase in the value of California Bearing Ratio on clay.

Download Full-text