DETERMINED SOIL CHARACTERISTIC OF PALU IN INDONESIA BY USING MICROTREMOR OBSERVATION

2016 ◽  
Author(s):  
Rusnardi Rahmat Putra
Keyword(s):  
Soil Characteristic

scholarly journals Clay content and pH: soil characteristic associations with the persistent presence of chronic wasting disease in northern Illinois

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Sheena J. Dorak ◽  
Michelle L. Green ◽  
Michelle M. Wander ◽  
Marilyn O. Ruiz ◽  
Michael G. Buhnerkempe ◽  
...  
Keyword(s):  
Chronic Wasting Disease ◽  
Clay Content ◽  
Soil Characteristic ◽  
Wasting Disease

A numerical study on the influences of underlying soil and backfill characteristics on the dynamic behaviour of typical integral bridges

Bauingenieur ◽  
2020 ◽  
Vol 95 (11) ◽  
pp. S 2-S 11
Author(s):  
H. D. B. Aji ◽  
M. B. Basnet ◽  
Frank Wuttke
Keyword(s):  
Soil Structure ◽  
Dynamic Behaviour ◽  
Numerical Study ◽  
Coupled System ◽  
Soil Structure Interaction ◽  
Dynamic Resistance ◽  
Soil Characteristic ◽  
Structure Interaction ◽  
Integral Bridges ◽  
Underlying Soil

Abstract The identification of the dynamic behaviour of a structure is one of the crucial steps in the design of the dynamic resistance of the structure. The dynamic behaviour is represented by the natural frequencies and damping which are subsequently used along with the considered dynamic actions in the design process. In regard of integral bridge concept, one of the consequences of the omission of joints and bearings is the substantial soil-structure interaction which in turn increases the sensitivity of the dynamic behaviour of the bridges to the surrounding soil characteristic. In this article, we extended our hybrid BEM-FEM steady-state dynamic numerical tool to the 3D regime, developed by utilizing an in-house BEM and the commercial FEM software ABAQUS and use it to analyse the dynamic interaction between the bridge and the underlying soil as well as the backfill. The numerical results from four typical integral bridges show that underlying soil characteristic has great effect on the resonant frequencies and the damping. The backfill material properties tend to have less significant role due to the abutment wingwalls dominating the force transfer between the soil and the superstructure. The results also show that the degree of influence of the soil-structure interaction on the coupled system is affected by the type of load pattern in addition to the flexural stiffness of the superstructure.

scholarly journals PENGARUH PUPUK KOMPOS DAN FREKUENSI PEMBERIAN MOL BONGGOL PISANG TERHADAP PERTUMBUHAN DAN PRODUKTIVITAS STROBERI (Fragaria sp.)

BUANA SAINS ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 29-40
Author(s):  
Nadhifa Hasna Fauziyah ◽  
Susilo Budiyanto ◽  
Adriani Darmawati Sudarman
Keyword(s):  
Bulk Density ◽  
Rice Straw ◽  
Soil Improvement ◽  
Growth And Yield ◽  
Soil Porosity ◽  
Banana Weevil ◽  
Duncan Multiple Range Test ◽  
Soil Characteristic ◽  
Number Of Leaves ◽  
Range Test

The aim of the study was to know the influence of the rice straw compost doses as fertilizer and the frequence microorganism local of banana weevil on the growth and yield of the strawberry. The experimental design of this research was Completely Randomize Design (CRD) factorial with three factors of rice straw compost doses (15, 20, 25 tons/ha) and three factors of frequence microorganism local of banana weevil (1 time, 3 times, and 5 times) with 3 replications. The parameter observed were bulk density of soil, porosity of soil, organic ingredients of soil, number of leaves, number of fruit, and weight of fruit. Data obtained was processed by analysis of variance and if there is an effect of yield treatment continued with Duncan multiple range test. The result showed that there are interaction between two treatment on bulk density and soil porosity. The compost doses and frequence microorganism local of banana weevil had significan effect on soil characteristic (bulk density, porosity, and organic ingredients of soil), improvement of best soil characteristic happen on compost doses 20 tons/ha and frequency microorganism local of banana weevil 2 times. Treatment of compost doses application 25 tons/ha will improve the parameters of number of leaves and number of fruit, while the best weight of fruit happen on compost doses 20 tons/ha with frequency microorganism local of banana weevil 1 time.

scholarly journals Soil characteristic and shallot growth with gypsum and zeolite amendments in irrigated saline Alfisol and Inceptisol

2021 ◽  
Vol 8 (3) ◽  
pp. 2801-2808
Author(s):  
Rahayu Rahayu ◽  
Jauhari Syamsiyah ◽  
Livia Dewi
Keyword(s):  
Electric Conductivity ◽  
N Uptake ◽  
Sodium Adsorption Ratio ◽  
Pot Experiment ◽  
Soil Types ◽  
Soil Characteristic ◽  
Saline Irrigation ◽  
The Third ◽  
Randomized Design ◽  
Completely Randomized Design

Salinity of soil and irrigation is a factor that may cause a decrease in shallot productivity, so it requires efforts with amendments. This research aimed to determine the effect of gypsum and zeolite amendments on soil and shallot growth with saline irrigation. A pot experiment was conducted in the field using a completely randomized design with three factors. The first factor was two soil types (Alfisol and Inceptisol); the second factor was three shallot cultivars (Brebes, Purbalingga, and Pemalang); and the third factor was two types of soil amendments. The results showed that gypsum and zeolite reduced pH, sodium adsorption ratio (SAR), electric conductivity paste (ECp) and Na of the soils studied. Gypsum and zeolite increased the uptake of N, P and K by shallot plants. The increase of N uptake by applying gypsum on Inceptisol was more effective to Brebes and Purbalingga cultivars than Pemalang cultivar. Gypsum increased the diameter and number of bulbs in Inceptisol. Zeolite and gypsum increased bulb weight of Purbalingga cultivar in Alfisol.

scholarly journals Straw Checkerboard Barriers Improve Soil Characteristic and Growth Performance of Winter Cover Crops and Protect Sloping Land

2021 ◽  
Author(s):  
Elahe Ahmadpoor Dehkordi ◽  
Ali Abbasi Surki ◽  
Mehdi Pajouhesh ◽  
Pejman Tahmasebi
Keyword(s):  
Growth Performance ◽  
Cover Crops ◽  
Water Status ◽  
Control Plant ◽  
Available Phosphorus ◽  
Bare Ground ◽  
Soil Characteristic ◽  
Management Actions ◽  
Winter Cover ◽  
Winter Cover Crops

Abstract Aims Straw checkerboard barrier technology, as a sustainable and environment-friendly method, is intended for erosion control, plant recovery at endangered areas. Finding how soil chemical properties and water status alters and how pilot cover plants respond are vital for extra management actions. Methods In order to study soil characteristic and growth performance of winter cover crops, an experiment was carried out in 2018. Checkerboards were setup in a 1×1 m pattern with rice residues. Seeds of Onobrychis sativa, Secale montanum and Agropyron sp were sown at the checkerboards and bare ground as the control. Detailed analyses were carried out on the physiological responses and the related soil properties during the growing season in borders and centers of the straw checkerboards and bare ground. Results Soil covered with straw checkerboard barriers was more effective for improving vegetation growth, established taller plants with higher biomass. Based on the physiological analyses, the rye grown in a straw checkerboard coped well with dry conditions. Higher proline content and more efficient osmotic adjustment indicate improvements of soil water retention status, which may alleviate drought stress damages and improve cover crop performance in straw checkerboard plots. Photosynthetic pigments also showed higher contents in these conditions for rye. Soil organic matter, total nitrogen, available phosphorus and potassium and water storage increased in checkerboards too; however, such effects vary with the crop type. Conclusions This technique could be deemed as an effective management strategy in semi-arid areas and an important method for conserving natural resources and sustaining productivity.

scholarly journals Agro-Climatic Data by County: A Spatially and Temporally Consistent U.S. Dataset for Agricultural Yields, Weather and Soils

Data ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 66
Author(s):  
Seong Do Yun ◽  
Benjamin M. Gramig
Keyword(s):  
Spatial Data ◽  
Crop Yields ◽  
Original Data ◽  
Data Sources ◽  
Weather Data ◽  
Climatic Data ◽  
Soil Characteristic ◽  
Growing Seasons ◽  
Aggregation And Disaggregation ◽  
Agricultural Yields

Agro-climatic data by county (ACDC) is designed to provide the major agro-climatic variables from publicly available spatial data sources to diverse end-users. ACDC provides USDA NASS annual (1981–2015) crop yields for corn, soybeans, upland cotton and winter wheat by county. Customizable growing degree days for 1 °C intervals between −60 °C and +60 °C, and total precipitation for two different crop growing seasons from the PRISM weather data are included. Soil characteristic data from USDA-NRCS gSSURGO are also provided for each county in the 48 contiguous US states. All weather and soil data are processed to include only data for land being used for non-forestry agricultural uses based on the USGS NLCD land cover/land use data. This paper explains the numerical and geo-computational methods and data generating processes employed to create ACDC from the original data sources. Essential considerations for data management and use are discussed, including the use of the agricultural mask, spatial aggregation and disaggregation, and the computational requirements for working with the raw data sources.

Specific root area: A soil characteristic

1989 ◽  
Vol 119 (2) ◽  
pp. 245-249 ◽  
Author(s):  
K. Lõhmus ◽  
T. Oja ◽  
R. Lasn
Keyword(s):  
Soil Characteristic ◽  
Root Area ◽  
Specific Root Area
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