Temat: soil resistance - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A critical review on soil ionisation modelling for grounding electrodes
Autorzy:: Mokhtari, M.
Abdul-Malek, Z.
Gharehpetian, G.B.
Powiązania:: https://bibliotekanauki.pl/articles/950672.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: grounding electrodes
grounding electrode resistance
soil ionisation modelling
Opis:: Grounding electrode resistance non-linearly changes under impulse conditions due to soil ionisation phenomenon. Several models have been proposed to model soil ionisation for grounding electrodes applications. However, to date, there is yet an attempt made to compile all these works into a comprehensive review article. Therefore, this paper is written with the objective of summarizing all related works in this field as a one– stop reference. With reference to the literature, this paper is written to summarize the working principles of the soil ionisation models as well as the accuracy and performance analysis of the models. This paper, particularly highlights the deficiencies of the available models in terms of accuracy and performance. This knowledge will contribute to the development of a new accurate and efficient soil ionisation model.
Źródło:: Archives of Electrical Engineering; 2016, 65, 3; 449-461
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Semi-Empirical Model of the Wheel-Soil System
Autorzy:: Tarkowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/2023706.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: rolling resistance
wheel-soil interaction
deformable ground
opór toczenia
interakcja koło-gleba
odkształcalne podłoże
Opis:: The article presents a proposal of a semi-empirical model of a wheel – soil system. Measurements of the values characterizing this cooperation were carried out with the use of a measuring and test stand, consisting of the SST sensor for measuring the soil stress components and a dynamometer for measuring forces acting on the road wheel. The research was carried out on three different soils: sandy, loess and peat. Graphs showing the correlation between forces and stresses in the substrate were obtained. It was observed the influence of soil type and other parameters on the type and course of the curves in these graphs.
Źródło:: Advances in Science and Technology. Research Journal; 2021, 15, 4; 93-100
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A study of the movement dynamics of the working tool for the furrow formation
Studium dynamiki ruchu narzędzia roboczego do formowania bruzd
Autorzy:: Zorya, M.
Ivanos, S.
Powiązania:: https://bibliotekanauki.pl/articles/334933.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: soil
working tool
furrow
draft resistance
Opis:: The furrow depth in the corn furrow drilling is directly connected with the working depth of the furrower hoe, their evenness being determinative for the stability of the drill ploughshare depth. The main factors which influence the furrower movement stability are the field microrelief, the soil condition, the tillage mode and their design parameters. The effect of first two factors on the hoe of the furrower is of a random character and is determined as the sum of dispersions of each variable at the output of the dynamic unit. A transfer function has been determined on the basis of the obtained mathematical model. It reproduces fluctuations of angle ψ as the fluctuations of the tillage depth and represents a conservative link. The obtained transfer function allowed to calculate the amplitude-frequency characteristics of the dynamic system. The analysis of the theoretical amplitude-frequency characteristics showed that an elastic articulated joint of the cultivator hoe with the furrower in the form of wing flaps or blades connected to the frame of the row-crop drill results in increased amplitude fluctuation in a transversely-vertical plane. It has been established that this occurs within a frequency range from 1.3 to 1.6 Hz representing the field microrelief fluctuations, yet they do not belong to the range of resonance oscillations. It has been proved that significant decrease in the fluctuations of the furrower is possible after its equipment with a spring of high deflection rate. Under real conditions the elastic articulated joint of a combined working tool with a row-crop drill frame practically corresponds to the rigid one with more than 20 kN m-1 deflection rate.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2015, 60, 2; 85-88
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Activity of beta-glucosidase, arylsulfatase and phosphatases in soil contaminated with copper
Aktywnosc beta-glukozydazy, arylosulfatazy i fosfataz w glebach zanieczyszczonych miedzia
Autorzy:: Wyszkowska, J
Kucharski, M.
Kucharski, J.
Powiązania:: https://bibliotekanauki.pl/articles/14356.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: beta-glucosidase activity
arylsulphatase
phosphatase
soil contamination
copper
resistance
Opis:: A pot experiment was carried out to determine the effect of soil (loamy sand and sandy loam) contamination with copper doses of 0, 150, 450 mg Cu·kg-1 d.m. soil on the activity of β-glucosidase (EC 3.2.1.21), acid phosphatase (EC 3.1.3.2), alkaline phosphatase (EC 3.1.3.1) and arylsulfatase (EC 3.1.6.1) in soil. The resistance of these enzymes to copper pollution was also estimated. Soil samples were contaminated with copper chloride. The experiment was carried out in five replications, in two series. The first series was performed on uncropped soil and the second one — on cropped soil. The experimental plants were oat, spring rape and yellow lupine. The activity of soil enzymes was determined in the analyzed samples on the 25th and the 50th day of the experiment. The results of the experiment showed that copper contamination in doses of 150 mg to 450 mg·kg-1 soil significantly inhibits soil’s biochemical activity. The sensitivity of the tested enzymes to copper was determined in the following order: alkaline phosphatase > arylsulfatase > acid phosphatase > β-glucosidase. The resistance of the above enzymes to copper depended on the cultivated plant spe- cies, soil type and the type of soil use and management. In samples of sandy loam, copper induced the smallest change in the activity of acid phosphatase and alkaline phosphatase, and in loamy sand — in the activity of arylsulfatase and acid phosphatase. In uncropped soil, copper was the least effective in changing the activity of arylsulfatase and acid phosphatase. All of the tested enzymes were less resistant to copper contamination in cropped than in uncropped soil. In soil planted with oat, β-glucosidase was the most resistant and arylsulfatase was the least resistant enzyme to copper contamination. In samples sown with spring rape, the analogous enzymes were arylsulfatase and alkaline phosphatase. In yellow lupine treatments, alkaline phosphatase was the most and β-glucosidase was the least resistant enzyme.
W doświadczeniu wazonowym badano wpływ zanieczyszczenia gleby (piasku gliniastego oraz gliny piaszczystej) miedzią w dawkach: 0, 150, 450 mg Cu·kg-1 s.m. gleby na aktywność: β-glukozydazy (EC 3.2.1.21), fosfatazy kwaśnej (EC 3.1.3.2), fosfatazy alkalicznej (EC 3.1.3.1) i arylosulfatazy (EC 3.1.6.1) w glebie. Określono także odporność tych enzymów na zanieczyszczenie miedzią. Glebę zanieczyszczano chlorkiem miedzi. Badania prowadzono w 5 powtórzeniach, w dwóch seriach. W pierwszej serii doświadczenia gleba była nieobsiana roślinami, w drugiej — obsiana. Roślinami doświadczalnymi były: owies, rzepak jary i łubin żółty. W 25. i 50. dniu trwania eksperymentu oznaczono w próbkach glebowych aktywność enzymów glebowych. Stwierdzono, że zanieczyszczenie gleby miedzią w zakresie od 150 mg do 450 mg·kg-1 gleby istotnie hamuje jej aktywność biochemiczną. Testowane enzymy, pod względem wrażliwości na miedź, można uszeregować następująco: fosfataza alkaliczna > arylosulfataza > fosfataza kwaśna > β-glukozydaza. Odporność enzymów na działanie miedzi zależała od gatunku uprawianej rośliny, rodzaju gleby i sposobu jej użytkowania. W glinie piaszczystej miedź wywołała najmniejsze zmiany w aktywności fosfatazy kwaśnej i fosfatazy alkalicznej, natomiast w piasku gliniastym — β-glukozydazy oraz arylosulfatazy. W glebie nieobsianej roślinami miedź wywoływała najmniejsze zakłócenia w aktywności arylosulfatazy i fosfatazy kwaśnej. W glebie obsianej roślinami wszystkie testowane enzymy były mniej odporne na zanieczyszczenie miedzią niż w glebie obsianej. Najbardziej odpornym enzymem na działanie miedzi pod uprawą owsa była β-glukozydaza, a najmniej — arylosulfataza, pod uprawą rzepaku jarego, odpowiednio — arylosulfataza i fosfataza alkaliczna, natomiast pod uprawą łubinu żółtego najbardziej odporna była fosfataza alkaliczna, a najmniej β-glukozydaza.
Źródło:: Journal of Elementology; 2010, 15, 1; 213-226
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Application of soil science research to the determination of the pollution resistance potential of landscape
Autorzy:: Malinowska, Ewa
Mikulska, małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/2028866.pdf
Data publikacji:: 2004-06-01
Wydawca:: Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:: soil
environment resistance potential
migration of pollutants
modelling
Opis:: The environment resistance potential is defined as the ability of the landscape to limit the negative pollutant impact consisting a.o.in the limiting, by means of accumulation, of the amount of pollutants circulating in the environment system. In practice, their quantity is contigent on the proporties of the components, which are capable of a relatively long-lasting chemical substance accumulation (thus, above all, the properties of the soil cover). The forecast model of environment changes describes the mechanisms and distribution rate of pollution in the soil profile and the interaction with the functional landscape structure. The methodological assumptions, determining of the real, complex diagnosis of the environment condition and for forecasting of the effects of the persisting anthropopressure and for establishing the necessary measures limiting the progressing degradation. Knowing, even approximatively, the mechanism of the existing changes one can determine the optimal (under circumstances) level of pollutant input, and when its limitation is impossible, one can control the use of the environmental potential in such a way as to minimize its negative impact.
Źródło:: Miscellanea Geographica. Regional Studies on Development; 2004, 11; 27-39
0867-6046
2084-6118
Pojawia się w:: Miscellanea Geographica. Regional Studies on Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Assessment of safflower for susceptibility to Pythium ultimum, the causal agent of damping-off.
Autorzy:: Pahlevani, M.
Ahmadi, A.
Razavi, S.
Powiązania:: https://bibliotekanauki.pl/articles/2199591.pdf
Data publikacji:: 2010-12-01
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: disease
resistance
seed
seedling
soil
Opis:: Genetic resistance against Pythium species would be an efficient control of this major seed and seedling fungal pathogen in safflower (Carthamus tinctorius), but so far no source has been identified. Therefore, identifying and then incorporating genetic resistance into the cultivars would be an ideal method of control for this disease. So in this study the resistance to seed rot and damping-off caused by Pythium ultimum among seventeen genotypes of safflower collected from all major production regions of the crop in Iran and some other countries was investigated. Pythium ultimum, previously identified as the most prevalent Pythium isolates on safflower, were used to infest the sterilized soil, which was seeded with safflower genotypes in greenhouse conditions. The experiment was conducted as a split plot design in which sterile and Pythium-infested soils were considered as main plots, and seventeen genotypes of safflower were sub plots. In sterile media, percent of seedling emergence (SES) and in Pythium-infested media, percent of seedling emergence (SEI), percent of diseased seedlings (DSI), percent of uninfected seedlings (USI) and percent of non-emerged seeds (NSI) were recorded. Symptoms showed that in safflower, damping-off occurred in both forms of pre and post emergence. Genotypic variation was existed for level of susceptibility to P. ultimum. Significant differences in SES and SEI were detected among safflower genotypes (P < 0.01), and a significant correlation between SES and seed weight (P < 0.05); SES with SEI (P < 0.05) were detected. Result showed that between evaluated genotypes there wasn’t any genotype with complete resistance (100%) to P. ultimum, so the susceptibilities were assayed. Based on the assessed variables, genotypes LRV-55-295, Aceteria, PI-250537 and IL-111 appear to be highly susceptible to the Pythium infection, whereas 34040, Arak281, and Isfahan were the least susceptible to the disease. Further research will be conducted to determine whether the resistance detected in these genotypes is heritable...
Źródło:: Plant Breeding and Seed Science; 2010, 62; 17-30
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Badania wytrzymałościowe żerdzi kotwi górniczych i gruntowych przy obciążeniu statycznym i dynamicznym
Strength testing of rock and ground anchor rods under static and dynamic loads
Autorzy:: Frąc, Witold
Pytlik, Andrzej
Pacześniowski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/2106543.pdf
Data publikacji:: 2020
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: kotwie górnicze
gwoździe gruntowe
mikropale iniekcyjne
wytrzymałość na obciążenie statyczne i dynamiczne
badania zmęczeniowe
rock bolts
soil nails
injection micropiles
resistance to static and dynamic load
fatigue tests
Opis:: Do wzmacniania górotworu oraz gruntu powszechnie stosuje się różnego typu żerdzie kotwi wykonane zarówno w postaci stalowych prętów o pełnym przekroju, jak i rur z gwintem na całej długości, które służą do iniekcji spoiw płynnych. W artykule przedstawiono metodykę oraz przykładowe wyniki wytrzymałościowych badań żerdzi kotwi samowiercących iniekcyjnych z gwintem falistym R32. Tego typu żerdzie stosowane są zarówno w górnictwie podziemnym, jak i geoinżynierii, przy obciążeniu statycznym i dynamicznym – o charakterze impulsowym (udarowym). Przedstawiono również wyniki badań mikropali iniekcyjnych o średnicach gwintu o zarysie trapezowym z zakresu T51–T111 mm, stosowanych głównie w geoinżynierii. Na podstawie norm oraz dokumentu EAD (European Assessment Document), obowiązującego w Unii Europejskiej, w artykule przedstawiono także podstawowe wymagania w zakresie obciążeń zmęczeniowych, stawiane gwoździom i mikropalom iniekcyjnym stosowanym w geoinżynierii.
Various types of anchor rods are commonly used for rock mass and soil reinforcement, produced either as full-section steel rods or tubes with threads along their entire length, which are used for the injection of liquid binders. This paper presents the methodology and sample results of strength tests of self-drilling injection anchor rods with R32 rope threads. Such rods are used both in underground mining and in geoengineering under static and dynamic (impact) loads. The results of tests of injection micropiles with trapezoidal thread diameters in the range of T51–T111 mm, used mainly in geoengineering, are provided as well. This paper also presents the basic requirements for the fatigue loading of nails and injection micropiles used in geoengineering, based on standards and the European Assessment Document (EAD), applicable in the European Union.
Źródło:: Mining – Informatics, Automation and Electrical Engineering; 2020, 58, 2; 79-86
2450-7326
2449-6421
Pojawia się w:: Mining – Informatics, Automation and Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Changes in the microbiological and biochemical properties of soil contaminated with zinc
Autorzy:: Wyszkowska, J.
Boros-Lajszner, E.
Borowik, A.
Kucharski, J.
Baćmaga, M.
Tomkiel, M.
Powiązania:: https://bibliotekanauki.pl/articles/1190211.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: zinc
soil enzymes
microbes resistance
plants resistance
Opis:: Zinc is an essential element for all living organisms, but overexposure to this element can have strongly toxic effects. A pot experiment was carried out to evaluate the influence of different zinc concentrations (0, 100, 300, 600, 1200, 2400, 4800 mg Zn2+ kg-1 of soil) on the soil biological activity by analyzing changes in soil stability over time and by determining the resistance (RS) of microorganisms and soil enzyme activity. The influence of Zn2+ on the growth and development of oat and white mustard was evaluated. Overexposure to zinc inhibited the growth of soil microorganisms, the activity of soil enzymes, and the growth and development of plants. Excessive zinc doses cause lower microbial biodiversity and enzyme activity. Bacteria of the genus Azotobacter were most sensitive and spore-forming oligotrophic bacteria were least sensitive to excessive zinc doses. β-glucosidase was most resistant and arylsulfatase was least resistant to the analyzed element. The resistance of the tested microorganisms and enzymes decreased with an increase in zinc accumulation in the soil environment. White mustard was more sensitive to zinc contamination than oat and zinc doses of 2400 and 4800 mg Zn2+ kg-1 led to the death of white mustard plants. The results of this study indicate that soil contamination with zinc poses a threat for living organisms. In areas with a higher risk of zinc deposition, the content of this element in soils should be monitored more frequently than prescribed by environmental protection regulations.
Źródło:: Journal of Elementology; 2017, 22, 2; 437-451
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Characterization of heavy metals resistant heterotrophic bacteria from soils in the Windmill Islands region, Wilkes Land, East Antarctica
Autorzy:: Tomova, Iva
Vasileva-Tonkova, Evgenia
Stoilova-Disheva, Margarita
Powiązania:: https://bibliotekanauki.pl/articles/2051132.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Antarctica
soil bacteria
hydrolytic enzymes
antibiotic resistance
metalresistance
Źródło:: Polish Polar Research; 2014, 4; 593-607
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Czynniki wpływające na zmiany zwięzłości gleb leśnych podczas pozyskiwania surowca drzewnego
Factors affecting the changes in penetration resistance of forest soils during timber harvesting
Autorzy:: Kulak, D.
Stańczykiewicz, A.
Szewczyk, G.
Lubera, A.
Strojny, T.
Powiązania:: https://bibliotekanauki.pl/articles/989881.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewostany sosnowe
trzebiez pozna
pozyskiwanie drewna
metody pozyskiwania drewna
oddzialywanie na glebe
gleby lesne
ugniatanie gleby
zwiezlosc gleb
timber harvesting
mechanized
motor−manual
soil penetration resistance
Opis:: The objective of the studies was to determine the penetration resistance (cohesion) of soil compacted at timber harvesting in Scots pine stands subjected to late thinning. The scope of the investigations was limited to two technologies – the mechanized one, using a harvester−forwarder machine set, as well as the motor−manual one, employing petrol chainsaws and a farm tractor for forwarding and dragging of felled trees. The analyses were performed in central Poland, in the Staszów Forest District, for two habitats – fresh mixed coniferous forest and fresh mixed deciduous forest. The measurements of soil cohesion were taken with the use of Eijkelkamp 06.15.SA Penetrologger penetrometer along the five measurement lines situated perpendicularly to the main skidding track. The soil penetration resistance was measured in eight spots for every measurement line: in the middle of the left and right wheel−rut, between the wheel−ruts, on the left and right roadside within a distance of 0.5 and 1 m from the wheel−rut edge, and 10 m from the right wheel−rut; the latter location was treated as the reference. The mechanized timber harvesting caused stronger compaction of soil, particularly in wheel−ruts, where the recorded values of soil cohesion exceeded 3 MPa (fig. 1). For the technology with farm tractor for skidding, the greatest soil compaction was also encountered in wheel−ruts, reaching up to 2.5 MPa. With regard to both logging technologies, the analysis of variability in penetration resistance of the top 10−cm soil horizon revealed a statistically significant increase in soil compaction in wheel−ruts when compared with other measuring points along and nearby the skid track (fig. 2). The employed technology of timber harvesting and the degree of soil cohesion in wheel−ruts were proved to be correlated. In respect of the mechanized variant, the mean value of soil penetration resistance in the top 10−cm layer counted up to 2 MPa and was significantly greater than the one in motor−manual technology, where it did not exceed 1.3 MPa. No significant differences in soil compaction in reference to the investigated forest habitats were revealed, though it was stronger in fresh mixed coniferous forest, with regard to both technological variants. The motor−manual technology caused the increase in soil penetration resistance by 2% on the roadside, nearly 20% in the middle of the skid track and over 70% in wheel−ruts. While the mechanized logging operations resulted in 30% increase in soil cohesion on the roadside, 55% between the wheel−ruts and over 250% inside the wheel−ruts (fig. 3).
Źródło:: Sylwan; 2015, 159, 04; 318-325
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Dynamic analysis of embedded chains in mooring line for fish cage system
Autorzy:: Hou, H. M.
Dong, G. H.
Xu, T. J.
Zhao, Y. P.
Bi, C. W.
Powiązania:: https://bibliotekanauki.pl/articles/259892.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: embedded chains
soil resistance
parameter sensitivity
dynamic analysis
Opis:: Investigation of the embedded chains in soil starts to play an important role in understanding the structural performance of mooring system, when the embedded anchors will be employed to sustain large loads with the gradually growth of installation depth of offshore aquaculture farm. The aim of this study is to investigate the dynamic response of mooring line considering the influence of embedded chains in clay soil for net cage system. Lumped-mass method is used to establish the numerical model for evaluating the performance of mooring line with embedded chains. To validate the numerical model, comparisons of numerical results with the analytical formulas and the experimental data are conducted. A good agreement of the profile and the tension response is obtained. Then, the effect of embedded chains on the static and dynamic response of mooring line is evaluated, and the dynamic behavior of mooring system considering embedded chains for net cage system is investigated. The results indicate that the soil resistance on embedded chains should be included to predict the mooring line development and the load on the embedded anchors in the numerical simulations. An appropriate safety factor should be included if employing the simplified model Case C at the initial design phase. And the effect of embedded chains on the holding capacity of embedded anchors in single-point mooring system for single net cage cannot be negligible during the design and operation phases. Consequently, it is profound to take into account the interaction of embedded chains and soil for accurately predicting the reliability of mooring system for fish cage.
Źródło:: Polish Maritime Research; 2018, 4; 83-97
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Effect of soil fatigue on frost resistance of one-year old apple-tree shoots, Topaz cultivar
Wpływ zmęczenia gleby na mrozoodporność jednorocznych pędów jabłoni odmiany Topaz
Autorzy:: Zydlik, Z.
Zydlik, P.
Powiązania:: https://bibliotekanauki.pl/articles/11541753.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:: soil fatigue
frost resistance
one-year shoot
apple tree
shoot
Topaz cultivar
replantation disease
conductometry
Opis:: The presented studies have shown the effect of soil fatigue on the decrease of resistance to low temperatures in one-year old apple-tree shoots. The highest frost resistance was demonstrated by the shoots of apple-trees grown in localities so far not utilized for fruit-tree cultivation.In a replanted apple-tree orchard, the plantation of trees in the grass inter-rows of the old apple orchard did not cause any explicit increase of frost resistance by the apple-tree shoots.
Wykazano wpływ zjawiska zmęczenia gleby na obniżenie odporności jednorocznych pędów jabłoni na niskie temperatury. Największą mrozoodpornością cechowały się pędy drzew rosnących na stanowiskach nieuprawianych dotychczas sadowniczo. W replantowanym sadzie jabłoniowym wysadzanie drzew w rzędach murawy starego sadu jabłoniowego nie spowodowało jednoznacznego wzrostu mrozoodporności pędów drzew.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2008, 07, 2; 83-88
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of uniaxial compression on water retention, hydraulic conductivity and the penetration resistance of six Greek soils
Autorzy:: Panayiotopoulos, K.P.
Salonikiou, E.
Siaga, K.
Germanopoulou, V.
Skaperda, S.
Powiązania:: https://bibliotekanauki.pl/articles/26633.pdf
Data publikacji:: 2003
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: hydraulic conductivity
uniaxial compression
Greece
penetration resistance
Greek soil
water retention
Źródło:: International Agrophysics; 2003, 17, 4
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Effects of tillage alteration on soil water content, maize crop water potential and grain yield under subtropical humid climate conditions
Autorzy:: Chen, J.
He, Y.
Li, P.
Powiązania:: https://bibliotekanauki.pl/articles/2082993.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: soil penetration resistance
occasional deep tillage
no-till
seasonal drought
Opis:: Seasonal drought stress is common in farmland even under humid climate conditions. Low soil water content and high penetration resistance in clayey soil are both factors that limit crop growth, which is significantly affected by tillage. In a twoyear (2014-2015) field experiment conducted in Hubei, China, the effects of conventional tillage, along with occasional deep tillage and no-till, on the soil water content and penetration resistance values of red soil and on the crop water potentials of the maize crop (Zea mays L.) were tested. Compared to conventional tillage, deep tillage reduced the difference in the soil water characteristic curve between 0-40 cm soil layers, resulting in a more loose and homogeneous topsoil. The deep tillage significantly (p<0.05) decreased soil penetration resistance, increased soil-available water content and soil water content during the dry period, promoted an increase in maize root density by 11.4~31.6%, and increased the water potential of the maize root and leaf during most growth stages. In contrast, the effect of no-till was opposite to that of deep tillage, reducing maize grain yield by 25.3~26.3%. The results confirmed that no-till is not appropriate for the clayey red soil but rather that tillage is needed. This suggests that occasional deep tillage is helpful in mitigating seasonal crop drought stress under the conditions of a humid climate.
Źródło:: International Agrophysics; 2021, 35, 1; 1-9
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Experimental studies of the prototype device for soil application of dehydrated digestate
Badania eksperymentalne prototypu urządzenia do doglebowej aplikacji odwodnionego pofermentu
Autorzy:: Talarczyk, Włodzimirz
Łowiński, Łukasz
Mac, Jarosław
Wojciechowski, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/334170.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: digestate
soil application
spreader
hitch
disc harrow
experimental tests
stresses
working resistance
poferment
aplikacja doglebowa
rozrzutnik
zaczep
brona talerzowa
badanie eksperymentalne
naprężenia
opory robocze
Opis:: The experimental results of the prototype device for soil application of dewatered digestate, consisting of a modernized manure spreader and aggregated disc harrow, are presented. The main purpose of the tests were stress measurements in the harrow's frame structure and the hitch attached to the manure spreader's chassis. The results of measurements were found to be very consistent in real conditions with the results of strength analyzes carried out on the computational model. The work was carried out at the Industrial Institute of Agricultural Engineering in Poznań as part of the BIOSTRATEG 1/269056/NCBR/2015 project co-financed by the National Center for Research and Development under the Biostrateg program.
Przedstawiono wyniki badań eksperymentalnych prototypu urządzenia do doglebowej aplikacji odwodnionego pofermentu, składającego się ze zmodernizowanego rozrzutnika obornika i zagregowanej z nim brony talerzowej. Głównym celem badań były pomiary naprężeń w konstrukcji nośnej brony i zaczepie zamocowanym do podwozia rozrzutnika. Stwierdzono dużą zgodność wyników pomiarów w warunkach rzeczywistych z wynikami analiz wytrzymałościowych przeprowadzonych na modelu obliczeniowym. Prace przeprowadzono w Przemysłowym Instytucie Maszyn Rolniczych w Poznaniu w ramach projektu BIOSTRATEG 1/269056/NCBR/2015 dofinansowanego przez NCBR w ramach programu Biostrateg.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2019, 64, 1; 44-49
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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