Organic soil subsidence

1984 ◽  
pp. 107-122 ◽  
Author(s):  
John C. Stephens ◽  
Leon H. Allen ◽  
Ellen Chen
Keyword(s):  
Organic Soil ◽  
Soil Subsidence

THE EFFECT OF WATER TABLE DEPTH IN ORGANIC SOIL ON SUBSIDENCE AND SWELLING

1984 ◽  
Vol 64 (2) ◽  
pp. 273-282 ◽  
Author(s):  
J. A. MILLETTE ◽  
R. S. BROUGHTON
Keyword(s):  
Key Words ◽  
Water Table ◽  
Soil Surface ◽  
Organic Soil ◽  
Harvest Time ◽  
Growing Period ◽  
Subsidence Rate ◽  
Soil Subsidence ◽  
Before And After ◽  
Made In

The effects of two water table depths (WTD), 0.6 and 0.9 m below the soil surface on subsidence, subsidence rate and swelling of an organic soil were observed in large undisturbed cores under greenhouse conditions. Measurements were made in two tiers, 0–0.3 m (top tier) and 0.3 m to WTD (bottom tier) during the growth of a carrot crop with WTD as above, and continued following a rise in the water table. The WTD of 0.9 m caused the top tier to subside twice as much as the same tier in the 0.6 m WTD. Top tier subsidence seemed irreversible in both WTD because minor swelling was observed following a rise in the water table. Most of the reversible subsidence occurred in the bottom tier. Raising the water table reduced the total profile subsidence by 36 and 24% for the 0.6 and 0.9 m WTD, respectively. After correction for oxidation, subsidence accounted for 3.2 and 5.9% of the 0.6- and 0.9-m profiles, respectively. The bulk density increase in the 0.6-m profile before and after the end of the experiment was not significant but a significant increase of 11% was measured in the 0.9-m profile. Subsidence rates decreased in both tiers during the growing period reaching a minimum in both WTD at harvest time. The subsidence rate in 0.9-m profile at 100 days after seeding was 2.5 times the rate in the 0.6-m profile. Key words: Organic soil, subsidence, swelling, water table

Monitoring and Empirical Modelling for Organic Soil Subsidence Estimation in Sumatra

2018 ◽  
Vol 8 (5) ◽  
pp. 2263
Author(s):  
Nurhamidah Nurhamidah ◽  
Bujang Rusman ◽  
Bambang Istijono ◽  
Abdul Hakam ◽  
Ahmad Junaidi
Keyword(s):  
Organic Soil ◽  
Empirical Modelling ◽  
Soil Subsidence

COUNTING TOTAL BACTERIA IN LAND ORGANIC WASTE HOUSEHOLD AND LAND INORGANIC WITH TOTAL PLATE COUNT METHOD (TPC)

2017 ◽  
Vol 4 (2) ◽  
pp. 87-91
Author(s):  
Ekamaida Ekamaida
Keyword(s):  
Soil Fertility ◽  
Bacterial Population ◽  
Organic Soil ◽  
Biological Properties ◽  
Plate Count ◽  
Bacterial Populations ◽  
Fertility Data ◽  
Plate Count Method ◽  
The Mean ◽  
Total Bacteria

The soil fertility aspect is characterized by the good biological properties of the soil. One important element of the soil biological properties is the bacterial population present in it. This research was conducted in the laboratory of Microbiology University of Malikussaleh in the May until June 2016. This study aims to determine the number of bacterial populations in soil organic and inorganic so that can be used as an indicator to know the level of soil fertility. Data analysis was done by T-Test that is by comparing the mean of observation parameter to each soil sample. The sampling method used is a composite method, which combines 9 of soil samples taken from 9 sample points on the same plot diagonally both on organic soil and inorganic soil. The results showed the highest bacterial population was found in total organic soil cfu 180500000 and total inorganic soil cfu 62.500.000

SAFARI 2000 ORGANIC SOIL CARBON AND NITROGEN DATA (ZINKE ET AL.)

2002 ◽  
Author(s):  
W. R. EMANUEL ◽  
J. S. OLSON ◽  
W. M. POST ◽  
A. G. STANGENBERGER ◽  
P. J. ZINKE
Keyword(s):  
Soil Carbon ◽  
Organic Soil ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen

LBA REGIONAL ORGANIC SOIL CARBON AND NITROGEN DATA (ZINKE ET AL.)

2003 ◽  
Author(s):  
W. R. EMANUEL ◽  
J. S. OLSON ◽  
W. M. POST ◽  
A. G. STANGENBERGER ◽  
P. J. ZINKE
Keyword(s):  
Soil Carbon ◽  
Organic Soil ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen

GLOBAL ORGANIC SOIL CARBON AND NITROGEN (ZINKE ET AL.)

1998 ◽  
Author(s):  
W. R. EMANUEL ◽  
J. S. OLSON ◽  
W. M. POST ◽  
A. G. STANGENBERGER ◽  
P. J. ZINKE
Keyword(s):  
Soil Carbon ◽  
Organic Soil ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen

On organic soil carbon and CO2

Tellus ◽  
1978 ◽  
Vol 30 (5) ◽  
pp. 472-475 ◽  
Author(s):  
Hinrich L. Bohn
Keyword(s):  
Soil Carbon ◽  
Organic Soil

Establishment of a Non-dormant Blueberry (Vaccinium Corymbosum Hybrid) Production System in a Warm Winter Climate

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 529a-529
Author(s):  
Rebecca L. Darnell ◽  
J.G. Williamson ◽  
T.A. Obreza
Keyword(s):  
Production System ◽  
Soil Amendments ◽  
Organic Soil ◽  
Vaccinium Corymbosum ◽  
Flower Bud ◽  
Winter Climate ◽  
Warm Winter ◽  
Canopy Volume ◽  
Continuous Application ◽  
Leaf Retention

A high-density planting of three southern highbush cultivars was established in 1994 in southwest Florida to test the feasibility of a non-dormant blueberry production system. A non-dormant system involves continuous application of nitrogen throughout fall and winter, which enables the plants to avoid the normal dormancy cycle and the concomitant chilling requirement. Three nitrogen fertilizer rates and two organic soil amendments (muncipal solid waste compost and acidic peat) were evaluated for effects on maintaining plant growth in this system. In general, increasing N rates from 84 to 252 kg·ha–1 increased plant canopy volume, leaf retention, and rate of new vegetative budbreak. Plant height and volume were consistently greater for plants grown in the compost compared to the peat amendment, but there were no differences in leaf retention or vegetative budbreak between the two soil amendments. Flower bud density and fruit yield were increased in plants grown in the compost compared to the peat, while N rate had no effect on either. Plants in this non-dormant system have shown no deleterious growth effects, suggesting that establishing a blueberry planting in a warm winter climate is feasible under the described conditions.

Control of Magnesium Deficiency in Utah 10B Celery Grown on Organic Soil

1957 ◽  
Vol 21 (5) ◽  
pp. 528-532 ◽  
Author(s):  
K. E. E. Johnson ◽  
J. F. Davis ◽  
E. J. Benne
Keyword(s):  
Magnesium Deficiency ◽  
Organic Soil

scholarly journals Geophysical surveys integrated with rainfall data analysis for the study of soil piping phenomena occurred in a densely urbanized area in eastern Sicily

2021 ◽  
Author(s):  
Graziano Patti ◽  
Sabrina Grassi ◽  
Gabriele Morreale ◽  
Mauro Corrao ◽  
Sebastiano Imposa
Keyword(s):  
Data Analysis ◽  
Land Use Planning ◽  
Urban Areas ◽  
Rainfall Data ◽  
Soil Subsidence ◽  
Hydrogeological Characteristics ◽  
Geophysical Surveys ◽  
Soil Piping ◽  
Definition Of ◽  
Surface Collapse

AbstractThe occurrence of strong and abrupt rainfall, together with a wrong land use planning and an uncontrolled urban development, can constitute a risk for infrastructure and population. The water flow in the subsoil, under certain conditions, may cause underground cavities formation. This phenomena known as soil piping can evolve and generate the surface collapse. It is clear that such phenomena in densely urbanized areas represent an unpredictable and consistent risk factor, which can interfere with social activities. In this study a multidisciplinary approach aimed to obtain useful information for the mitigation of the risks associated with the occurrence of soil piping phenomena in urban areas has been developed. This approach is aimed at defining the causes of sudden soil subsidence events, as well as the definition of the extension and possible evolution of these instability areas. The information obtained from rainfall data analysis, together with a study of the morphological, geological and hydrogeological characteristics, have allowed us to evaluate the causes that have led to the formation of soil pipes. Furthermore, performance of 3D electrical resistivity surveys in the area affected by the instability have allowed us to estimate their extension in the subsoil and identifying the presence of further areas susceptible to instability.

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