Use of undisturbed and artificial soil samples for the brf laboratory measurements of cultivated soils complementing the measurements acquired in the field

2011 ◽  
Author(s):  
Jerzy Cierniewski ◽  
Jan Piekarczyk ◽  
Marcin Gulinski ◽  
Slawomir Krolewicz ◽  
Bogdan Zagajewski
Keyword(s):  
Soil Samples ◽  
Artificial Soil ◽  
Laboratory Measurements ◽  
Cultivated Soils

scholarly journals Sulphur status in Finnish cultivated soils

1973 ◽  
Vol 45 (2) ◽  
pp. 121-215
Author(s):  
Johan Korkman
Keyword(s):  
Ammonium Acetate ◽  
Induction Furnace ◽  
Soil Samples ◽  
Total Sulphur ◽  
Sulphate Sulphur ◽  
Close Relationship ◽  
Mineral Soils ◽  
Sulphur Uptake ◽  
Cultivated Soils

A method for determining total sulphur in plant material and soil samples using the induction furnace technique and subsequent turbidimetric determination of sulphate sulphur was discussed. A procedure for extracting sulphur from soil samples with ammonium acetate (pH 4.65), the interference of the organic matter being reduced by oxidation of the extract with H2O2, was proposed. Sulphur balance in Finnish cultivated soils was estimated by taking into account the average amounts of emitted (8 kg S/ha/yr.), precipitated (8 kg S/ha/yr.) and leached (8 kg S/ha/yr.) sulphur. The actual situation in the cultivated soils seems thus to be depending, on an average, on the uptake by plants and the sulphur applied (12 kg S/ha/yr. in the early 1970s). In 104 samples of cultivated soil, the content of total sulphur showed a slight correlation with the content of organic carbon. The amounts of sulphur extracted in various ways were not predictable by means of the soil characteristics used (pHCaCl2, org. C and texture). Extracted sulphur did not correlate sufficiently with the development and sulphur uptake of plants. Under field conditions in northern Finland, sulphur application produced a relatively distinct result in respect both to the ley yields on Carex peat, and their sulphur content. On mineral soils in southern Finland the yields were unaffected by supplementary fertilization with sulphur. In the pot experiments performed a fairly close relationship between sulphur and nitrogen was demonstrated.

PHYTOPHTHORA SPP. IN SOILS OF THE OKANAGAN AND SIMILKAMEEN VALLEYS OF BRITISH COLUMBIA

1964 ◽  
Vol 42 (10) ◽  
pp. 1411-1415 ◽  
Author(s):  
D. L. McIntosh
Keyword(s):  
British Columbia ◽  
Irrigation Water ◽  
Soil Samples ◽  
Phytophthora Cactorum ◽  
Phytophthora Spp ◽  
Orchard Soils ◽  
Chemotactic Effect ◽  
Irrigated Soils ◽  
Cultivated Soils

Phytophthora cactorum is widely distributed in irrigated soils in the Okanagan and Similkameen valleys of British Columbia. Other species isolated, when over 1800 soil samples were assayed for the presence of Phytophthora fungi, were P. cryptogea twice, P. cambivora once, P. megasperma var. sojae once, and P. drechsleri twice. Phytophthora spp. were not recovered from virgin soils nor from non-irrigated cultivated soils, nor from orchard soils receiving irrigation water that is chlorinated. P. cactorum, P. cryptogea, and P. cambivora are pathogenic to rootlets of pear, cherry, apricot, and peach seedlings. P. megasperma var. sojae and P. drechsleri were weakly to non-pathogenic to these hosts. Pear and apple rootlets exerted a chemotactic effect on zoospores of P. cambivora and P. cactorum.

scholarly journals Status of available sulphur and cationic micronutrients in cultivated soils of Banaskantha district of Gujarat

2018 ◽  
Author(s):  
Dipali Desai ◽  
B T Patel ◽  
Neha Chaudhary ◽  
Praveen Thakur
Keyword(s):  
Mean Value ◽  
Soil Samples ◽  
Standard Procedures ◽  
Nutrient Index ◽  
Very High ◽  
Cultivated Soils

In order to assess the available sulphur and micronutrients (Fe, Mn, Zn and Cu) status in soils of Banaskantha district of Gujarat, five hundred and fifty six representative surface (0-15cm) soil samples were collected from farmer’s field of each taluka of Banaskantha district. All the collected soil samples were analyzed for available sulphur and DTPA-extractable cationic micronutrients (Fe, Mn, Zn and Cu) as per standard procedures. The available S content in soils of Banaskantha district varied from 4.98 to 66.89 mg kg-1 with a mean value of 15.49 mg kg-1. The DTPA- extractable Fe, Mn, Zn and Cu were in the range of 2.74 to 21.98; 4.22 to 25.02; 0.20 to 2.76 and 0.12 to 3.16 mg kg-1 with a mean value of 6.72, 10.15, 0.60 and 0.60, respectively. The overall nutrient index values were marginal for available S (1.82) and DTPA-extractable Fe (1.84) and Zn (1.74); high for DTPA-extractable Mn (2.40) and very high for Cu (2.75).

scholarly journals Bacterial Community and Diversity from the Watermelon Cultivated Soils through Next Generation Sequencing Approach

2021 ◽  
Vol 37 (6) ◽  
pp. 521-532
Author(s):  
Mahesh Adhikari ◽  
Sang Woo Kim ◽  
Hyun Seung Kim ◽  
Ki Young Kim ◽  
Hyo Bin Park ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Bacterial Community ◽  
South Korea ◽  
Genomic Dna ◽  
Soil Samples ◽  
Community Diversity ◽  
Next Generation ◽  
Ngs Data ◽  
Generation Sequencing ◽  
Cultivated Soils

Knowledge and better understanding of functions of the microbial community are pivotal for crop management. This study was conducted to study bacterial structures including Acidovorax species community structures and diversity from the watermelon cultivated soils in different regions of South Korea. In this study, soil samples were collected from watermelon cultivation areas from various places of South Korea and microbiome analysis was performed to analyze bacterial communities including Acidovorax species community. Next generation sequencing (NGS) was performed by extracting genomic DNA from 92 soil samples from 8 different provinces using a fast genomic DNA extraction kit. NGS data analysis results revealed that, total, 39,367 operational taxonomic unit (OTU), were obtained. NGS data results revealed that, most dominant phylum in all the soil samples was Proteobacteria (37.3%). In addition, most abundant genus was Acidobacterium (1.8%) in all the samples. In order to analyze species diversity among the collected soil samples, OTUs, community diversity, and Shannon index were measured. Shannon (9.297) and inverse Simpson (0.996) were found to have the highest diversity scores in the greenhouse soil sample of Gyeonggi-do province (GG4). Results from NGS sequencing suggest that, most of the soil samples consists of similar trend of bacterial community and diversity. Environmental factors play a key role in shaping the bacterial community and diversity. In order to address this statement, further correlation analysis between soil physical and chemical parameters with dominant bacterial community will be carried out to observe their interactions.

INCREASE IN MINERAL N IN SOILS DURING WINTER AND LOSS OF MINERAL N DURING EARLY SPRING IN NORTH-CENTRAL ALBERTA

1986 ◽  
Vol 66 (3) ◽  
pp. 397-409 ◽  
Author(s):  
S. S. MALHI ◽  
M. NYBORG
Keyword(s):  
Field Experiments ◽  
Early Spring ◽  
Soil Samples ◽  
Frozen Soil ◽  
Late Winter ◽  
Mineral N ◽  
N Accumulation ◽  
N Content ◽  
North Central ◽  
Cultivated Soils

Ten field experiments were conducted on cultivated soils in north-central Alberta to determine any change in mineral N content of soils during winter, and during early spring after the soils had thawed. Soil samples were taken periodically from fall to spring to a depth of 120 (or 90) cm and were analyzed for NH4-N and for NO3-N. Mineral N changes occurred primarily in the top 60 cm. Between fall and late winter, there was an increase of 48 kg N ha−1 of mineral N (range of 27–83) in the 60-cm depth of eight experiments set on stubble and the value increased only to 55 kg N ha−1 when the sampling depth was extended to 120 (or 90) cm. Considering only the values from soil samples taken when soils were frozen, the increase in mineral N was 31 kg N ha−1 (range of 14–54) in the 120-cm depth, and the average net mineral N accumulation was 0.35 kg N ha−1 d−1 (range of 0.26–0.43). There was a loss of mineral N during early spring of 44 kg N ha−1 (range of 18–71). The two experiments on summerfallow had more over-winter accumulation of mineral N and more loss in early spring compared to the stubble experiments. This study showed large increases in the mineral N content when the soil was frozen and large decreases in the early spring. The mechanism of increase in mineral N in frozen soil was not determined. The cause of the decrease in early spring was most likely denitrification, and was not leaching of nitrate. The results of the investigation may have implications for the time of soil test sampling and for the loss of native N from cultivated soils. Key words: Ammonium N, frozen soil, mineral N, nitrate N, early spring loss

scholarly journals The occurrence of arbuscular mycorrhizaI fungi (GlomeraIes) in cuItivated soiIs of Poland

2013 ◽  
Vol 55 (1) ◽  
pp. 41-48
Author(s):  
Janusz Błaszczykowski ◽  
Anna Iwaniuk ◽  
Beata Czerniawska
Keyword(s):  
Triticum Aestivum ◽  
Zea Mays ◽  
Plant Species ◽  
Mycorrhizal Fungi ◽  
Rhizosphere Soil ◽  
Arbuscular Mycorrhizal ◽  
Fungal Species ◽  
Soil Samples ◽  
Glomus Caledonium ◽  
Cultivated Soils

The occurrence of arbuscular mycorrhizal fungi (AMF) in cultivated soils of Poland was characterized based on 15-year investigations. Spores of AMF were isolated from both field-collected root-rhizosphere soil mixtures and trap cultures established with a part of these mixtures. The mixtures were collected from under 41 plant species. The plant species most frequently sampled were <i>Hordeum vulgare, Triticum aestivum</i>, and <i>Zea mays</i>. Spores of AMF were found in 97,5% of the field-collected root-soil samples and in 95,5% of trap cultures. The AMF predominating in populations of the spores revealed were members of the genus <i>Glomus</i>. The spores recovered belonged to 36 species. The AM fungal species most frequently occurring in cultivated soils of Poland were <i>Glomus caledonium, G.constrictum, G.deserticola</i>, and <i>G.mosseae</i>.

The Microbiology of Some Permafrost Soils in the Mackenzie Valley, N.W.T.

ARCTIC ◽  
1965 ◽  
Vol 18 (4) ◽  
pp. 256 ◽  
Author(s):  
K.C. Ivarson
Keyword(s):  
Boreal Forest ◽  
Incubation Temperature ◽  
Soil Samples ◽  
Microbial Flora ◽  
Forest Transition ◽  
Tundra Soils ◽  
Large Numbers ◽  
Permafrost Soils ◽  
Cultivated Soils

Reports on the microbial flora of soil samples obtained in northern Mackenzie District in July 1960. Large numbers of microorganisms were found, more in the tundra-boreal forest transition types than in the tundra, also more in uncultivated than in cultivated soils. Decrease in incubation temperature reduced the numbers of actinomycetes and bacteria in the tundra-boreal forest transition soils but less effect on those from tundra soils and on fungi numbers. Predominance of the various fungi genera isolated however was influenced by temperature.

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