scholarly journals Estimating the chemical composition of the soil solution of glasshouse soil. 1. Compositions of soil solution and aqueous extracts.

1989 ◽  
Vol 37 (4) ◽  
pp. 311-322
Author(s):  
J. van den Ende
Keyword(s):  
Chemical Composition ◽  
Soil Solution ◽  
Analytical Data ◽  
Storage Period ◽  
Saturated Soil ◽  
Aqueous Extracts ◽  
Equilibrium Solutions ◽  
Dry Soil ◽  
Water Saturated

Press extracts, saturation extracts and 1:5 by-weight extracts obtained from 75 glasshouse soils were analysed for EC and K, Na, Ca, Mg, NO3, Cl, SO4, HCO3 and P. The analytical data are discussed, with the exception of the HCO3 and P contents of press extracts, as these were much lower than the HCO3 and P contents of equilibrium solutions of the soils. The water-saturated soil pastes from which the saturation extracts were obtained were prepared from both field-moist and air-dry soil. They stood overnight at 25 degrees C before filtration. This overnight storage was unsatisfactory for NO3, as it induced denitrification in the saturated pastes prepared from air-dry soil. Hence, for the determination of NO3, saturation extracts were prepared from air-dry soil, with pastes standing only two hours before filtration. The suspensions from which the 1:5 by-weight extracts were obtained were prepared from air-dry soil and stood overnight at 25 degrees C before filtration. Again overnight storage proved unsatisfactory because of denitrification. Thus, for the determination of NO3, 1:5 suspensions were prepared, this time with a storage period of only two hours. (Abstract retrieved from CAB Abstracts by CABI’s permission)

TO DETERMINE THE PHYSICAL AND MECHANICAL PROPERTIES OF THE SOIL OF LANDSLIDE SLOPES FROM THE DEGREE OF POROSITY AND HUMIDITY

InterConf ◽  
2021 ◽  
pp. 917-933
Author(s):  
Аkbota Serikkyzy ◽  
A. Baimakhan ◽  
A. Makhanova ◽  
Baimakhan Baimakhan ◽  
G. Baimakhanova
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Local Stress ◽  
Saturated Soil ◽  
Degree Of Saturation ◽  
Stress Concentrations ◽  
Mountain Slope ◽  
Experimental Works ◽  
Water Saturated

The results of theoretical and experimental works devoted to the determination of the physical and mechanical properties of water–saturated soil are analyzed. On the basis of a comprehensive analysis, conclusions are formulated, and a method is proposed for determining the Young’s modulus and Poisson’s ratio for water-saturated soil, depending on humidity (degree of saturation) and porosity. Tables of data on the physical and mechanical properties of water–saturated soil are proposed. The study established the places of formation of local stress concentrations along the inclined layer. The values of dangerous stress concentrations found in various areas of the mountain slope that are vulnerable to collapse are shown in the tables.

scholarly journals Kompatibilitas Sumber Inokulan Fungi Mikoriza Arbuskular pada Kedelai dengan Budidaya Jenuh Air

2016 ◽  
Vol 35 (3) ◽  
pp. 229 ◽  
Author(s):  
Ridwan Muis ◽  
Munif Ghulamahdi ◽  
Maya Melati ◽  
Purwono Purwono ◽  
Irdika Mansur
Keyword(s):  
Relative Efficiency ◽  
Block Design ◽  
Dry Weight ◽  
P Uptake ◽  
Saturated Soil ◽  
Soil Culture ◽  
Randomized Block Design ◽  
Two Factors ◽  
Dry Soil ◽  
Water Saturated

The main problem encountered by soybean crop in acid sulfate tidal lands is less availability of P, because of its chemical bond with Fe. Heavy dose of  fertilization often lead to high fertilizer residue, wich could be used for crops farming using AMF. Research was conducted to study the effect of soybean culturing technique and AMF inoculants source on growth of  soybean. The treatments consisted two factors, arranged in a randomized block design with three replications. The first factor was four inoculants sources of AMF, namely AMF and without inoculation AMF, inoculants from rhizospheres of kudzu (Pueraria javanica), sorghum (Sorghum bicolor), corn (Zea mays) and soybean (Glycine max). The second factor was culturing tehnique, namely water saturated and dry soil culture. Soybeans were grown in pots containing 5 kg soil derived from tidal land,  Simpang Village, District of Berbak, East Tanjung Jabung Regency,  Jambi Province. Results showed that the interaction saturated soil culture with inoculants from corn’s rhizosphere had positive effect on the variability of N, P and K uptake, N and P content in the plant, relative efficiency of inoculants and relative efficiency of P uptake, stem diameter, biomass dry weight, the number of filled pods and seed dry weight of soybeans. Dry soil culture with inoculants of corn’s rhizosphere had greater root colonization, but overall for the growth and grain yield of soybean, saturated soil culture with inoculants from corn rhizosphere has better effect on other growth variables.

scholarly journals Estimating the chemical composition of the soil solution of glasshouse soil. 2. Relationships between the compositions of soil solution and aqueous extracts.

1989 ◽  
Vol 37 (4) ◽  
pp. 323-334
Author(s):  
J. van den Ende
Keyword(s):  
Soil Solution ◽  
Analytical Data ◽  
Field Capacity ◽  
Regression Equations ◽  
Aqueous Extracts ◽  
Moist Soil ◽  
Loss On Ignition ◽  
Dilution Factor ◽  
Mass Fractions ◽  
Water Contents

The possibilities of estimating ECs and K, Na, Ca, Mg, NO3, Cl and SO4 contents of press extracts of glasshouse soils from corresponding analytical data of saturation extracts or 1:5 by-weight extracts were examined through construction of regression equations. The analytical data of saturation and 1:5 by-weight extracts were and were not corrected by multiplication with dilution factors, these being the ratios between the water contents of the soils employed to obtain the extracts and the water contents of the soils at field capacity. The dilution factors used were not derived from actual water contents but from water contents assessed on the basis of loss-on-ignition values. In a number of cases, the estimation technique could be improved through introduction of one or two extra variables, such as the dilution factor, the corrected SO4 content of the extract, the water content of the field-moist soil and the ratio between the mass fractions clay and loss-on-ignition. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Storage of Human Blood Platelets

1974 ◽  
Vol 32 (02/03) ◽  
pp. 405-416 ◽  
Author(s):  
M. R Hardeman ◽  
Carina J L. Heynens
Keyword(s):  
Storage Temperature ◽  
Platelet Rich Plasma ◽  
Blood Platelets ◽  
Storage Period ◽  
Serotonin Uptake ◽  
Hypotonic Shock ◽  
Glycolytic Intermediates

SummaryStorage experiments were performed at 4°, 25° and 37° C with platelet-rich plasma under sterile conditions. In some experiments also the effect of storing platelets at 4° C in whole blood was investigated.Before, during and after three days of storage, the platelets were tested at 37° C for their serotonin uptake and response to hypotonic shock. In addition some glycolytic intermediates were determined.A fair correlation was noticed between the serotonin uptake and hypotonic shock experiments. Both parameters were best maintained at 25° C. Also platelet counting, performed after the storage period, indicated 25° C as the best storage temperature. Determination of glycolytic intermediates did not justify any conclusion regarding the optimal storage temperature. Of the various anticoagulants studied, ACD and heparin gave the best results as to the serotonin uptake and hypotonic shock response, either with fresh or stored platelets. The use of EDTA resulted in the lowest activity, especially after storage.The results of these storage experiments in vitro, correspond well with those in vivo reported in the literature.

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