The Use of the Soil-Geomorphological Database for Studying the Spatial Variability of the Humus Content, Physical Clay, and Clay in the Soils of the Kuznetsk–Salair Geomorphological Province

2021 ◽  
Vol 54 (7) ◽  
pp. 986-998
Author(s):  
N. V. Gopp
Keyword(s):  
Spatial Variability ◽  
Humus Content ◽  
Physical Clay

scholarly journals From the study of the characteristics of the mountain dark kastanozem in the mouth of Shar Khad in Uvur Zaisan, Bogd Khan mountain

2021 ◽  
Vol 31 (3) ◽  
pp. 137-142
Author(s):  
Lkhamsuren Byambaja ◽  
Khishigsaikhan Adiyazar ◽  
Janchivdorj Baatarkhuu ◽  
Soronzongombo Byambaa ◽  
Namjilsuren Ganbaatar
Keyword(s):  
Structural Stability ◽  
Soil Structure ◽  
Humus Content ◽  
Chemical Properties ◽  
Clay Content ◽  
Physical And Chemical Properties ◽  
Control Parameters ◽  
Physical Clay ◽  
Physical And Chemical ◽  
And Chemical Properties

We cut in 25.5 hectares of soil at the mouth of Shar Khad in Uvur Zaisan, Bogd Khan Uul, made morphological records, determined the soil structure, its stability, physical and chemical properties, and compared it with the soil properties of the fenced area selected as the main control parameters. In this study, we compared the structure, structural stability, physical and chemical properties of mountain dark kastanozem. For the soil structure of the study area, the proportion of 0.25-10 mm structure in the 0-8 cm layer is 5-18 %, and the structure size of less than 0.25 mm is 27 %, and the structural stability is 2-2.5 on average at 0-3 cm soil In terms of points and mechanical composition, light loam and sandy soils predominated in the 0-8 cm layer of soil, sand content increased by 48.2%, physical clay content decreased by 68.8%, and humus content decreased by 0.6% from the fenced area selected for control. As a result, the characteristics of the dark kastanozem degraded of the settled area. Богдхан уулын Өвөр Зайсангийн Шар хадны амны уулын хар хүрэн хөрсний шинж чанарыг судалсан дүн Бид Богд Хан уулын Өвөр Зайсангийн Шар хадны амны  25.5 га талбайн хөрсөнд зүсэлт хийж, морфологи бичиглэл үйлдэн, хөрсний бүтэц, түүний тогтвортой байдал, физик, химийн шинж чанарыг тодорхойлон голлох үзүүлэлтээр хяналт болгон сонгож авсан хашиж хамгаалсан талбайн хөрсний шинж чанартай харьцуулан уг судалгааг хийж гүйцэтгэв. Бид уг судалгаагаар уулын хар хүрэн хөрсний бүтэц, бүтцийн тогтвортой байдал, физик, химийн шинж чанарыг харьцуулан судлав. Судалгааны талбайн хөрсний бүтцийн хувьд 0-8 см үе давхаргад 0.25-10 мм хэмжээтэй бүтцийн эзлэх хувь 5-18 %, 0.25 мм-ээс бага хэмжээтэй бүтэц 27 %-ийг эзэлж, бүтцийн тогтвортой байдал хөрсний 0-3 см үед дунджаар 2-2.5 балл, механик бүрэлдэхүүний хувьд хөрсний 0-8 см үе давхаргад хөнгөн шавранцар механик бүрэлдэхүүн зонхилж, элсний агууламж 48.2 %-иар нэмэгдэж, физик шаврын агууламж 68.8 %-иар, ялзмагийн агууламж хяналт болгон сонгож авсан хашсан талбайнхаас 0.6 %-иар тус тус буурсан байна. Мөн хөрсний шим тэжээлийн элементүүд болох хөдөлгөөнт фосфор, солилцох калийн агууламжийн хувьд ч хашсан талбайнхаас бага байна. Дээрхи үр дүнгээс үзэхэд судалгааны талбайд тогтворжсон уулын хар хүрэн хөрсний шинж чанарт мэдэгдэхүйц өөрчлөлт орж талхагдал, доройтолд өртжээ гэж үзэх үндэстэй байна.  Түлхүүр үг: Хөрсний бүтэц, хөрсний бүтцийн тогтвортой байдал, хөрсний физик шинж, хими шинж, хөрсний доройтол

scholarly journals INTEGRATING OF GEOPHYSICAL AND AGROCHEMICAL METHODS FOR SLOPE LANDS STUDYING

2021 ◽  
pp. 53-58
Author(s):  
O. Kruglov ◽  
O. Menshov ◽  
V. Kolada ◽  
A. Achasova ◽  
O. Andreeva
Keyword(s):  
Magnetic Susceptibility ◽  
Humus Content ◽  
Physical Clay ◽  
Sloping Lands ◽  
Specific Magnetic Susceptibility ◽  
Rational Combination ◽  
Survey System ◽  
Combination Of Methods ◽  
Definition Of

The increasing of the soil degradation of agricultural lands in Ukraine requires the improvement of their survey system. First of all, it is related to the increase of the accuracy of determinations and the density of the measurement grid. To perform these tasks, new methods are involved, primarily the geophysics ones. There are certain advantages of the integration of the studies as well as development of the substantiated rational combination of methods. Recently, promising results of the application of the magnetic susceptibility of soil to characterize the agronomic properties have been obtained. This study shows the results of the integrated application of a number of agrochemical methods and determinations of mass-specific magnetic susceptibility (MS) on the example of podzolized chernozems of Kharkiv district of Kharkiv region. We identified the possibilities of culling of values of soil characteristics from the proceeding of the results of definition of MS. The nature of the correlation between MS and humus content allows us to recommend the replacement of more expensive determination of humus content with cheaper MS. Soil magnetic susceptibility correctly reflects the spatial distribution of the main indicators of eroded lands: the humus content, and physical clay. We propose the study of sloping lands with more optimal techniques of the MS measurement of the soil as the most accessible tool.

scholarly journals Evaluation of spatial variability of physico-chemical indicators of chernozem podzolic with the using of precise agriculture technologies

2020 ◽  
Vol 11 (4) ◽  
pp. 52-59
Author(s):  
S. O. Sychevskyy ◽  
◽  
O. L. Tonkha ◽  
O. V. Pikovska ◽  
◽  
...  
Keyword(s):  
Spatial Variability ◽  
Humus Content ◽  
Control Point ◽  
Soil Layer ◽  
Statistical Parameter ◽  
Chemical Properties ◽  
Calcium Content ◽  
Absolute Error ◽  
Average Value ◽  
Content Index

On the experimental fields of “Lotivka Elite” LLC of Shepetivka district of Khmelnytsky region the estimation of spatial heterogeneity of indicators of physical and chemical properties of chernozem podzolic was carried out. Statistical analysis of the data was performed on the following indicators: number of observations (n); average value (Xav); standard deviation (S); coefficient of variation (Cv); absolute error of the mean (SXav). The analysis of the probability of the nature of the humus content was performed according to the humus content index - the ratio of the actual humus content at the control point to the arithmetic mean. It is revealed that the probability of manifestation of average (typical) values of humus content at the studied object does not exceed 50%, deviations of probabilities from the average level of humus content in the direction of decrease do not exceed 40% of territorial distribution. Spatial variability of humus and mobile calcium content is average, CV is 19–23% (10 more CV less than 25). Statistical parameter of calcium content in the soil layer 0-30 cm on average - 252.4 ± 10.0, maximum - 350.0 ± 9.11 mg on 100 g of soil. In general, the field is dominated by soils with a content of mobile calcium 240.0-290.0 mg on 100 g of soil. Active acidity was characterized by low variability, the average was 6.5 ± 0.3, the maximum - 7.3 ± 0.2 pH units. The yield of winter wheat had a low degree of variability with an average of 87.4 ± 4.3 c on ha.

scholarly journals THE FERTILITY OF CHERNOZEMIC SOILS ON THE MORAINE DEPOSITS

2020 ◽  
pp. 30-36
Author(s):  
С.П. Ломов ◽  
В.С. Ломов
Keyword(s):  
Structural State ◽  
Humus Content ◽  
Lower Boundary ◽  
Low Fertility ◽  
Glacial Deposits ◽  
Physical Clay ◽  
Penza Oblast

Моренные отложения в Пензенской области образовались в результате разрушения Окско-донского ледника нижнего звена неоплейстоцена при потеплении [6, 15, 16]. Мощность основной морены может достигать ≈ 30,0 м [8, 10]. Ледниковые отложения донского горизонта по площади преобладают в западной части области. В современных физико-географических условиях они залегают в виде покрова на водоразделах и используются в агроценозе. Состав и свойства почв на моренных отложениях выделяются особенностями структурного состояния, своеобразным распределением фракций физической глины, невысоким содержанием гумуса и низким плодородием. Moraine deposits in the Penza oblast were formed as a result of the destruction of the Oka–Don glacier of the lower boundary of the neo-Pleistocene during warming [6, 15, 16]. The thickness of the main moraine can be ≈ 30.0 m [8, 10]. In terms of spacing, glacial deposits of the Don horizon predominate in the western part of the oblast. In current physical-geographical conditions, they are placed as the cover on watersheds and used in the agro-ecosystem. The composition and properties of soils on morainic deposits are special due to their structural state, peculiar distribution of physical clay fractions, low humus content and low fertility.

Spatial variability induces generalization in contextual cueing.

2020 ◽  
Vol 46 (12) ◽  
pp. 2295-2313
Author(s):  
Yoko Higuchi ◽  
Yoshiyuki Ueda ◽  
Kazuhisa Shibata ◽  
Jun Saiki
Keyword(s):  
Spatial Variability ◽  
Contextual Cueing

Spatial variability in responses to environmental conditions in Southern Hemisphere long-finned pilot whales

2019 ◽  
Vol 629 ◽  
pp. 207-218 ◽  
Author(s):  
V Hamilton ◽  
K Evans ◽  
B Raymond ◽  
E Betty ◽  
MA Hindell
Keyword(s):  
Spatial Variability ◽  
Southern Hemisphere ◽  
Environmental Conditions ◽  
Pilot Whales

Fertilization System as a Factor of Transforming the Humus State of the Soil

2015 ◽  
Vol 2 (2) ◽  
pp. 39-44
Author(s):  
V. Lopushniak
Keyword(s):  
Crop Rotation ◽  
Podzolic Soil ◽  
Humus Content ◽  
Organic Fertilizers ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Content Increase ◽  
Energy Reserves ◽  
Gross Energy ◽  
Stable Forms

Aim. To establish the effect of different fertilization systems in short fi eld crop rotation on the change in the state of humus in the dark gray podzolic soils in Western Forest-Steppe of Ukraine. Methods. Field studies were carried out in a stationary experiment of the Department of Soil Science and Agricultural Chemistry of the L’viv National Agrarian University; determination of humus content – according to DSTU 4289:2004, and that of its labile forms – in accordance with DSTU 4732:2007, fraction-group composition – by Ponomare- va-Plotnikova’s method, according to the measurement procedure 31-497058-008-2002. Results. The use of organo-mineral fertilizer system in short fi eld crop rotation with the saturation of organic fertilizers of 15 t/ha of crop rotation contributes to the humus content increase by 0.7 % after the third rotation in 0–40 cm layer of dark gray podzolic soil, the increase in the share of stable forms of humic compounds up to 57–59 % and the increase in the ratio of R HA :R FA to 1.3–1.4. The study demonstrated very high dependence of amount of gross energy reserves in the humus on the R HA :R FA ratio. Conclusions. The combined application of organic fertili- zers in the form of manure, non-market of the crop (straw) and siderate, along with mineral fertilizers is re- commended in short fi eld crop rotations of Western Forest-Steppe of Ukraine toensure expanded reproduction of fertility of dark gray podzolic soil, improvement of its humus status, increase in gross energy reserves and the share of the stable forms and humic acids in the humus.

DISTRIBUIÇÃO DA EVAPORAÇÃO EM ESTUFA PLÁSTICA NA PRIMAVERA

Irriga ◽  
2001 ◽  
Vol 6 (3) ◽  
pp. 120-127
Author(s):  
Reginaldo Ferreira Santos ◽  
Antonio Evaldo Klar
Keyword(s):  
Spatial Variability ◽  
Pan Evaporation ◽  
Spring Season ◽  
Class A ◽  
Agricultural Sciences ◽  
E Mail ◽  
Center Area ◽  
Class A Pan

DISTRIBUIÇÃO DA EVAPORAÇÃO EM ESTUFA PLÁSTICA NA PRIMAVERA  Reginaldo Ferreira SantosCentro de Ciências Exatas e Tecnológica da UNIOESTE- CP 711CEP 858114-110, Cascavel, PR - Fone: 0XX45 2203155.  E-mail: [email protected] Evaldo KlarDepartamento de Engenharia Rural - Faculdade de Ciências Agronômica- UNESP - CEP 18603-970 - Botucatu, SP. CP: 237.  E-mail:  [email protected]  1  RESUMO O presente trabalho teve como objetivo avaliar a distribuição da evaporação no interior de uma estufa plástica, com uma cultura de pimentão, através da variabilidade espacial e comparar a evaporação dos microevaporímetros com os valores do Tanque classe "A". O experimento foi conduzido no Campus da Universidade Estadual Paulista - FCA/UNESP, no período de primavera, em estufa plástica de polietileno de baixa densidade (PEBD). Na distribuição da evaporação em estufa com orientação norte/sul, verificou-se que as maiores evaporações ocorreram nas extremidades sul e norte tendente ao lado oeste. Já as menores evaporações localizaram-se no centro. No período de primavera, a evaporação média nos microevaporímetros superestimou em 55% a evaporação determinada no Tanque classe "A". UNITERMOS: evaporação, geoestatística, estufa.  SANTOS, R.F, KLAR, A.E.  EVAPORATION DISTRIBUTION INSIDE A PLASTIC TUNNEL IN THE SPRING SEASON  2  ABSTRACT                 The main aim of this study was to verify the evaporation distribution inside a plastic tunnel, with pepper crop, oriented to north/south, through spatial variability and to compare Class A Pan evaporation to punctual evaporations of 40 equidistant microevaporimeters placed from 50cm the soil. The study was carried out at the College of Agricultural Sciences/UNESP, Botucatu – SP in the spring season.  The highest evaporation occurred next to north and to south sides of the tunnel, with tendency to west. Consequently, the lowest evaporations occurred at the center area. The microevaporimeter evaporations were 55% higher than those obtained from Class A Pan. KEYWORDS: evaporation distribution, microevaporimeter.

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