Wyniki wyszukiwania - Biblioteka Nauki

1

Balance of magnesium under different fertilization systems in a long-term fertilization experiment on sandy soil

100%

Rutkowska B. , Szulc W. , Labetowicz J.

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tom 10

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nr 4 Suppl.1

88-89

2

Nitrogen regime of sward-podzolic loamy soils in the north-eastern part of Belarus

100%

Persikova T.

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2006

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tom Nr 17

85-86

3

Sandy Soil Reclamation Using Biochar and Clay-Rich Soil

88%

Thi D. P. , Hang N. N. T. , Viet O. T. , Van L. N. , Viet A. N. , Lan P. D. T. , Van N. V.

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tom Vol. 22, nr 6

26--35

EN

The investigations on the effects of biochar application in improving the physio-chemical properties of soil have been carried out in many studies; however, there are very few studies on the combined use of both biochar and clay-rich soil for poor nutrient soil reclamation. Therefore, this study demonstrates improved water retention and nutrient retention of sandy soil by using biochar and biochar combined with clay-rich soil. The experiments were conducted on a small scale (greenhouse) with nine different application rates of biochar and clay-rich soil were mixed and then cultivated peanut, along with the drip irrigation technique using field moisture limit (about 70-80%) was applied under the condition of ensuring a sufficient supply of NPK for plant’s growth. The results showed that at the rates from 10.0-15.0% (w/w) clay-rich soil mixed with from 0.5-1.5% (w/w) of biochar applied to the tested sandy soil resulted in the positive effects on soil water holding, bulk density, permeability, pH, CEC, OM, total N, total P and peanut yield. The physical and chemical characteristics of the tested sandy soil have been improved by time and the application rate of 10.0% clay-rich soil and 0.5% biochar had the highest efficiency of pod fresh weight and pod dry weight during three studied seasons.

4

Influence of organic-mineral fertilisation originating from brown coal on the improvement of sorption and retention properties of sandy soils

75%

Maciejewska A.

Polish Journal of Soil Science

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1998

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tom 31

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nr 2

5

The effect of slurry manuring on properties of humic compounds from sandy soil

75%

Straczynska S.

Polish Journal of Soil Science

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1998

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tom 31

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nr 2

6

Modification of sandy soil hydrophysical environment through bagasse additive under laboratory experiment

75%

Abd El-Halim A. A. , Kumlung A.

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tom 29

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nr 1

EN

Until now sandy soils can be considered as one roup having common hydrophysical problems. Therefore, a labo-ratory experiment was conducted to evaluate the influence of bagasse as an amendment to improve hydrophysical properties of sandy soil, through the determination of bulk density, aggregate-size distribution, total porosity, hydraulic conductivity, pore-space structure and water retention. To fulfil this objective, sandy soils were amended with bagasse at the rate of 0, 0.5, 1, 2, 3 and 4% on the dry weight basis. The study results demonstrated that the addition of bagasse to sandy soils in between 3 to 4% on the dry weight basis led to a significant decrease in bulk density, hydraulic conductivity, and rapid-drainable pores, and increase in the total porosity, water-holding pores, fine capillary pores, water retained at field capacity, wilting point, and soil available water as compared with the control treatment.

7

Badania porównawcze właściwości gleb leśnych i uprawnych wytworzonych z piasków i lessów

75%

Smal H. , Ligeza S.

Acta Agrophysica

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2001

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tom 56

8

Removing Heavy Metals through Different Types of Soils and Marble Powder found in Oman

75%

Wazwaz A. , Al-Salaymeh A. , Khan M. S.

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tom Vol. 20, nr 4

136--142

EN

In this research, adsorption followed by filtration was used for removing heavy metals (Cu, Zn, Mn, and Cr) from the polluted water. Three types of soils (silty, sandy and clay) and three types of marble powder (pure, impure, marble-granite mix) were used as an adsorbent. The soil and marble samples were collected from different regions of Oman. The maximum adsorption obtained was 96.01% for Zn using pure marble powder and the minimum adsorption obtained was 6.70% for Mn using impure marble powder. Through different soils, the maximum adsorption of 88.61% was achieved for Zn using clay and the lowest one is for Cr 16.51% using silty soil. The results suggest that among the marble powders, the pure ones show the maximum (96.01% for Zn) and marble-granite show the minimum (Mn 6.70%) adsorption performance. Among the adsorbents, Zn is the best adsorbate (96.01%) while the worst among the group is Mn, which merely adsorbed 6.70% with the selected adsorbents.

9

Temporal stability of electrical conductivity in a sandy soil

75%

Pedrera-Parrilla A. , Brevik E. C. , Giraldez J. V. , Vanderlinden K.

International Agrophysics

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2016

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tom 30

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nr 3

10

Long-lasting effects of bentonite on properties of a sandy soil deprived of the humus layer

75%

Czaban J. , Czyz E. , Siebielec G. , Niedzwiecki J.

International Agrophysics

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2014

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tom 28

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nr 3

EN

Bentonite has been recognized as a very good material for the improvement of coarse textured soils. In microplot experiment, of a sandy soil deprived of the humus layer was enriched in 1973 with waste bentonite at the rates of 0, 3, 6 and 12 kg m -2 . Until 2002, the microplots were planted with different crops and regularly enriched with mineral a nd organic fertili zers. Since 2003, the microplots were left barren. In 2009, determinations of several features of the soils (in 5-30, 30-55 and 55-80 cm layers) showed that the historical amendment of the sandy soil with bentonite (especially its highest dose) ensured significantly higher contents of water, organic C, clay, silt and a sand fraction with particle diameter <0.1 mm in 5-30 cm layer. Proportions of non-dispersible clay in the total clay of bentonite soils in the two upper soil layers were significantly lower than those of the control soil. A significant increase in the penetrometer resistance was observed in 40-58 cm layers of the control soil and the soil with 3 kg m -2 bentonite amendment, contrary to the soils with two highest bentonite doses.

11

Zawartość i przemiany azotanów w glebach piaskowych strefy ochronnej zakładów azotowych "Puławy" S.A.

75%

Bielińska E. J. , Węgorek T. , Głowacka A.

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2006

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tom Nr 17

14-15

12

Influence of soil fertilization on concentration of microelements in soil solution of sandy soil

75%

Rutkowska B. , Szulc W. , Labetowicz J.

Journal of Elementology

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2009

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tom 14

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nr 2

349-355

EN

The study was carried out to asses the influence of soil mineral fertilization, manure application and soil liming on changes in the concentration of microelements (B, Cu, Fe, Mn and Zn) in soil solution. The tests were performed on samples of sandy soil collected from long-term fertilization experiments being conducted on lessive soil of the granulometric structure of clayish sand. Soil solution was prepared with the suction method. The concentration of microelements in soil solution was determined by means of the ICP method. The results showed an increase in Fe, Mn, Zn and Cu and a decrease in B and Mo in soil solution when soil was fertilized with nitrogen. The concentration of microelements in soil solution was not significantly influenced when soil was fertilized with phosphorous and potassium. Liming had a significant effect on a decrease in the concentration of Fe, Mn, Zn and Cu and an increase in B and Mo in soil solution. Soil application of manure significantly increased the concentration of microelements in soil solution.

PL

Celem pracy była ocena wpływu nawożenia mineralnego oraz stosowania obornika i wapnowania na zmiany stężenia mikroelementów (B, Cu, Fe, Mn i Zn) w roztworze glebowym gleby lekkiej. Próbki glebowe pobrano z trwałego doświadczenia nawozowego prowadzonego na glebie płowej o składzie granulometrycznym piasku gliniastego lekkiego. Roztwór glebowy pozyskiwano metodą podciśnieniową. W roztworze glebowym mikroelementy oznaczono metodą ICP. Stwierdzono, że w warunkach nawożenia azotem obserwuje się zwiększenie stężenia żelaza, manganu, cynku i miedzi oraz zmniejszenie stężenia boru i molibdenu w roztworze glebowym. Nawożenie fosforem i potasem nie wpływa istotnie na stężenie mikroelementów w roztworze glebowym. Wapnowanie przyczynia się do zmniejszenia stężenia żelaza, manganu, miedzi i cynku oraz zwiększenia stężenia boru i molibdenu w roztworze glebowym, a pod wpływem stosowania obornika obserwuje się istotne zwiększenie stężenia mikroelementów w roztworze glebowym.

13

Ensuring the effect of self-sharpening of parts of tillage machines in operation in soils of various types

75%

Vasylenko M. , Buslaiev D. , Kalinin O.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2017

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tom 19

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nr 1

14

Scaling the hydraulic functions of a water repellent sandy soil

75%

Stoffregen H. , Wessolek G.

International Agrophysics

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2014

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tom 28

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nr 3

EN

The heterogeneity of both unsaturated hydraulic conductivity and water retention was measured with a high spatial resolution on a transect using an evaporation method. Fifteen undisturbed 100 cm 3 soil cores were taken on a transect every 10 cm from the topsoil of a water repellent sandy site. Five dynamic water retention curves and four unsaturated conductivity curves were determined for each core. We conducted measurements without further saturation in the laboratory in order to achieve field-like conditions. The initial water contents were hetero- geneous, indicating different hysteretic conditions and water repellent areas. The scattering of the water retention curves was high, while the heterogeneity of unsaturated conductivity curves was unexpectedly low. Two scaling approaches were used to describe the heterogeneity: one with and one without considering hysteresis. The concept of scaling applies well to describing the heterogeneity of both hydraulic functions. Including hysteresis leads to similar results than excluding hysteresis. The distribution of the hydraulic conductivity and the water retention were inde- pendent from each other. The results give important information for numerical simulation of the water flow with heterogeneous hydraulic functions.

15

Verification of strength resistance of sandy soil using small scale penetrometer tests

75%

Saleem H. D. , Aldefae A. H. , Humaish W. H.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2021

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tom 30

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nr 2[92]

16

Experiences with the use of a new measuring method to determine the free water content in soil

75%

Block F. R. , Geber H. , Gross C. , Kalbskoph K. , Vedder G.

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nr 1

17

Mobile forms of radionuclide 137 Cs in sandy soils in Northeastern Poland

75%

Niesiobedzka K.

Polish Journal of Environmental Studies

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2000

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tom 09

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nr 2

EN

Mobile forms of radionuclide 137Cs in different soils (natural pastures) of northeastern Poland were evaluated. An attempt was made to show if and what mobile forms of 137Cs are related to different soil properties. For this reason 108 soil samples from 0 to 10 cm in depth were measured for mobile forms of 137Cs activity and analyzed for clay fraction, pH-value, exchangeable potassium (Kex.), exchangeable calcium (Caex.), magnesium (Mgex.), sodium (Naex.) content, organic matter and organic carbon content (C org.), and cation exchange capacity (CEC). Samples of soils were collected in the period from June 1995 to July 1996. The radiocaesium and mobile forms of 137Cs activity were determined by gamma spectrometry. The mobility of 137Cs was studied by means of sequential extraction. Mobile forms of radionuclide l37Cs were related to physicochemical parameters of soils.

18

Attempt to develop an assortment of herbaceous honey-productioning plants to be used for the improvement of bee pastures on idle lands

75%

Koltowski Z. , Jablonski B.

|

tom 45

19

Effect of sprinkler irrigation and nitrogen fertilization on weed infestation of potatoes canopy on a poor sandy soil

75%

Rolbiecki S. , Peszek J. , Rolbiecki R.

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1998

|

nr 15

20

Zmiana retencyjnych właściwości gleb po zastosowaniu hydrożelu

63%

Boczon A. , Wrobel M.

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tom 548

|

nr 1

PL

Brak wody w glebie w okresach letnich, wpływa negatywnie na rozwój roślin. Tam gdzie utrudnione jest stosowanie nawodnień szuka się alternatywnych rozwiązań tego problemu. Jednym z nich jest stosowanie hydrożelu. Poniższe badania miały na celu określenie zmian w możliwościach retencyjnych gleby piaszczystej i torfowo-murszowej na obszarach leśnych po dodaniu hydrożelu. W tym celu posłużono się krzywą sorpcji wody, z której można odczytać wiele ważnych właściwości wodnych gleby. Do wyznaczenia krzywych pF wykorzystano aparat piaskowy firmy Ejikelkamp oraz komory ciśnieniowe Soil Moisture - Santa Barbara USA. Wyniki potwierdzają dużą przydatność stosowania hydrożelu w glebach, w celu zwiększenia wilgotności oraz wydłużenia okresu jej występowania.

EN

The water deficit in soil in summer-times have a negative influence on the growth of plants. It there are difficulty with the usage of irrigatings, the use of the alternative solutions of this problem becomes necessary. One of them is the use of hydrogel. The presented research aims at determining the changes in the possibility of water retention by the sandy soil and peat-moorsch soil in forest areas, after hydrogel was added. According to the above the curve of the water sorption, was used from which we can read many important water properties of the soil. In order to mark the pF curves the Ejikelkamp sand box and pressure chambers by Soil Moisture - Santa Barbara USA were used The obtained results confirm the hoghly useful application of the hydrogel in soils, for the purpose of increasing of soil moisture and prolonging the period of its occurrence.