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    Wyświetlanie 1-6 z 6
    Tytuł:
    Characteristics and classification of soils derived from Awi sandstone formation in Awi, Akamkpa local government area of Cross River State, Nigeria
    Autorzy:
    Aki, E. E.
    Ediene, V. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1161576.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Awi sandstone
    Nigeria
    soil morphology
    soil taxonomy
    toposequence
    Opis:
    Soils derived from Awi sandstone formation in Awi, Akamkpa LGA of Cross River State, Nigeria were studied along a toposequence with a view to classifying them taxonomically, assessing their potentials and suggesting appropriate management strategies. Three profiles were dug at the crest, middle slope and lower slope of the landscape. The morphological properties of these soils: colour, soil structure, soil consistence, drainage, boundaries and root inclusions were recorded in the field. These soils were deep (>100 cm), with sandy loam surface texture over sandy clay to sandy clay loam subsurface textures. These soils had hues of 10 YR - 5 YR with sub angular blocky structure and a sticky consistence (wet) and bulk density of 1.0 - 1.7 g/cm3 with total porosity of 22 - 38 %. Soil reactions in H2O were acidic (pH 4.7- 5.8). These soils have Organic Carbon of 14.4 - 38.1 g/kg; total nitrogen 1.2 - 3.3 g/kg; available phosphorus 4.1- 8.3 mg/kg; exchangeable acidity (H+) 0.5 - 11.9 cmol/kg; Cation Exchange Capacity (CEC) 2.0 - 6.0 cmol/kg and base saturation 20.0 - 52.5 %. The soils were classified according to the USDA Soil Taxonomy as Typic Kandiudults and correlated as Dystric Acrisols as per FAO- WRB for soil resources. It is recommended that soils fertility management practices should focus on reducing leaching of basic cations from the soils through mulching, planting of cover crops, crop rotation, adoptions of zero tillage as well as planting of acid tolerant crops and application of liming materials to reduce the strong acidity in these soils.
    Źródło:
    World Scientific News; 2018, 112; 142-152
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biochar from residual biomass in Turkey, and possibility of return to the soil: an estimation of the supply and demand
    Autorzy:
    Kutlu, Ozben
    Kocar, Gunnur
    Powiązania:
    https://bibliotekanauki.pl/articles/2148758.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    biochar
    torrefaction
    slow pyrolysis
    soil amendment
    soil taxonomy of Turkey
    agriculture
    crop residues
    Opis:
    The aim of the study was to analyse the potential of production and utilization of biochar as a marketable product in agriculture for Turkey. Towards this aim, the distribution of ar- able land, crop residues and soil types of Turkey were identified. The biochar production potential was evaluated depending on prominent residual biomass streams in Turkey. In addition, how much biochar would be needed for arable soil types found in Tur- key was estimated according to previous studies which investi- gated the effect of biochar on similar soil taxonomy and/or plant grown. Total crop production is focused on southern, western and central Anatolia, although the arable lands of Turkey prevail in seven regions. The residues of wheat, barley, corn and cotton stalk, tea, banana, hazelnuts and forest were found to be higher than other residuals in different regions and they could be suitable for biochar production. Furthermore, it was highlighted that the low water holding capacity of soil, alkalinity, salinity and soil pollution impeded the crop productivity. Although, the biochar produced from prominent residues was one-fiftieth less than that of total estimated amount of biochar needed for arable soils, it ob- viously improves the plant growth and soil characteristics, when used together with fertilizer, especially for zonal and intrazonal soils. At this point, it could be focused on the long-term field ex- periments due to determine the special and productive addition rate of biochar for Turkey, and biochar addition to the soil could be channelled into threatened priority arable lands by the public authorities.
    Źródło:
    Polish Journal of Agronomy; 2017, 30; 10-24
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technosols and other proposals on urban soils for the WRB [World Reference Base for Soil Resources]
    Autorzy:
    Lehmann, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24898.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    life quality
    human activity
    soil
    urban area
    soil texonomy
    urban soil
    taxonomy
    World Reference Base for Soil Resources
    Źródło:
    International Agrophysics; 2006, 20, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Description of Leptopharynx bromeliophilus nov. spec. and Leptopharynx australiensis nov. spec. (Ciliophora, Nassulida)
    Autorzy:
    Omar, Atef
    Foissner, Wilhelm
    Powiązania:
    https://bibliotekanauki.pl/articles/763567.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Australia, α-taxonomy, bromeliad tanks, Jamaica, Leptopharynx costatus, soil ciliates.
    Opis:
    Using standard morphological methods, we describe two new Leptopharynx species, each discovered in a specific biogeographic region and habitat. Leptopharynx bromeliophilus nov. spec., a minute species (25 × 20 μm) discovered in tanks of bromeliads from Jamaica, is small-mouthed and has a slightly concave preoral region, an average of 27 basal bodies in kinety 4, and a total of 142 basal bodies on average. Leptopharynx australiensis nov. spec., a comparatively large species (40 × 25 μm) discovered in jungle soil of Australia, is large-mouthed and has a distinctly oblique preoral region, widely spaced kinetids in kinety 1, a total of 184 basal bodies on average, and the oral primordium is inside of a cortical fold thus appearing right of the posterior end of kinety 1. Four new features are recognized for distinguishing Leptopharynx species: (1) to have a monomorphic (producing either small- or large-mouthed cells) or polymorphic (producing microstomes and macrostomes) life cycle; (2) the spacing of the kinetids in kinety 1 as either ordinary or wide; (3) the shape (flat or concave) and angle (≤ 15° slightly oblique, ≥ 40° distinctly oblique) of the preoral region; and (4) the total number of basal bodies, which has proven statistically.
    Źródło:
    Acta Protozoologica; 2011, 50, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The potential and pitfalls of exploiting nitrogen fixing bacteria in agricultural soils as a substitute for inorganic fertiliser
    Autorzy:
    Cummings, S. P.
    Humphry, D. R.
    Santos, S. R.
    Andrews, M.
    James, E. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/363190.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    szczepionka
    żyzność gleby
    rolnictwo
    taksonomia
    Rhizobium
    Rhizobial inoculants
    soil fertility
    agriculture
    taxonomy
    rhizobia
    Opis:
    Nitrogen fixing bacteria have been used for centuries to improve the fertility of agricultural soils. Since the introduction of inorganic nitrogen (N) fertiliser that provides a reliable boost to crop yields whilst reducing land and labour requirements, the use of biological nitrogen fixation has been in decline. Recently, concerns have been expressed about the sustainability of inorganic N fertiliser application, however, there remain doubts about whether N2 fixing bacteria alone can provide agriculture with sufficient fixed N to feed a burgeoning global population. In this paper we review the current state of our knowledge regarding those diazotrophic bacteria that have a role to play in agriculture. We focus on our current areas of research, particularly, the importance of understanding the classification and mechanism of action of N2 fixing bacteria that are used in agricultural soils. We discuss the applications of N2 fixing bacteria that illustrate their potential to provide sustainable N, particularly focussing on Australian and South American agricultural systems where these bacteria are widely exploited to maintain soil fertility. We also identify problems with the use of bacteria as inoculants, including ineffective inoculation due to poor quality preparation, the use of appropriate isolates and issues with sustainability. We review the outlook for biological N fixation highlighting how molecular biology may enable the expression of N fixation in non-leguminous crops.
    Źródło:
    Environmental Biotechnology; 2006, 2, 1; 1-10
    1734-4964
    Pojawia się w:
    Environmental Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena wystepowania larw Diptera w glebach Lasu Wolskiego i na przyleglej lace
    Autorzy:
    Chrzan, A
    Marko-Worlowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/794589.pdf
    Data publikacji:
    2006
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    wystepowanie
    taksonomia
    gleby
    Diptera
    zageszczenie
    Las Wolski
    biomasa
    laki
    larwy
    struktura troficzna
    tereny przylegle
    occurrence
    taxonomy
    soil
    population density
    Las Wolski area
    biomass
    meadow
    larva
    trophic structure
    surrounding area
    Opis:
    Porównywano zespoły larw Diptera w glebach Lasu Wolskiego i przyległej do niego łąki. Na podstawie wyników uzyskanych w trakcie pięcioletnich badań stwierdzono różnice w zespołach tych larw, które dotyczą: 1. zagęszczenia - w 1 m² gleby leśnej zanotowano występowanie 555 osobników, zaś w glebie łąkowej jedynie 129 osobników; 2. stanu biomasy - zdecydowanie wyższą biomasą zespołu (839,51 mg s.m.) charakteryzowały się larwy występujące w glebie lasu. W glebie łąkowej biomasa larw wynosiła 139,64 mg s.m.; 3. średniego ciężaru osobniczego larw - znacznie wyższego w glebie lasu (1,51 mg s.m.) niż w glebie łąki (1,08 mg s.m.); 4. zróżnicowania larw - wyraźnie wyższe na stanowisku łąkowym, gdzie stwierdzono przedstawicieli 17 rodzin. W lesie natomiast wyodrębniono ich 14; 5. struktury dominacji w biomasie - w strukturze troficznej zespołu larw w Lesie Wolskim dominowały formy fitosaprofagiczne (46,6% udziału), zaś w zespole larw w glebie łąki dominowały formy drapieżne (53,8% udziału). Różnice w zespołach glebowych larw Diptera na stanowiskach leśnych w porównaniu z łąkowymi są wykazywane przez wielu autorów, jednak uzyskane w toku badań aż tak znaczne różnice mogą wskazywać na mniejszy wpływ antropopresji na gleby Lasu Wolskiego niż na glebę przyległej do niego łąki. Jednocześnie dominacja biomasy larw drapieżnych w strukturze troficznej zespołu larw na łące świadczyć może o dużej naturalności łąki.
    The groups of Diptera larvae living in soils of both the Wolski forest and the neighbouring meadow were compared. Taking into account the results of five-year studies the differences in groups of larvae were observed which concerned the following areas: 1. the density - per 1 sq. m of forest soil 555 individuals were observed whereas in the meadow soil only 129 were present; 2. biomass state - larvae of the Wolski forest soil were characterized by definitely greater biomass (89.51 mg DM) than those living in the meadow soil (139.64 mg DM); 3. average individual weight of larvae - those living in forest soil were heavier (1.51 mg DM) than those of meadow soil (1.08 mg DM); 4. diversity of larvae - in meadow soil the representatives of 17 families were detected whereas in the forest soil only 14 were present; 5. domination structure in biomass - in trophic structure of the larvae group in the Wolski forest phytosaprophages (46.6%) dominated whereas in the larvae group of meadow soil predators (53.8%) prevailed. Many authors reported the differences in the groups of Diptera larvae in forest and meadow localities. However, the results obtained in the research denote significant discrepancy and they may indicate weaker influence of antropogenic pressure on the soil of Wolski forest than on the adjacent meadow soil. At the same time, domination of predator larvae biomass in trophic structure of the group of larvae in meadow soil may indicate the wilderness of meadow.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 515; 37-45
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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