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1

Effect of nitrogen fertilization and soil management on soil mineral nitrogen in the apple orchard

100%
Wrona D., Sadowski A.
Journal of Fruit and Ornamental Plant Research
|
2004
|
tom 12
|
nr Spec.ed.
2

Investigation for biological nitrogen removal from wastewater using simultaneous nitrification-denitrification technology

84%
Vaboliene G.
Annals of Warsaw Agricultural University - SGGW. Land Reclamation
|
2006
|
nr 37
111-121
3
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Influence of liming and mineral fertilization on the content of mineral nitrogen in soil

84%
Bednarek W., Reszka R.
Journal of Elementology
|
2008
|
tom 13
|
nr 3
Nitrogen is a key factor which shapes the fertility and fecundity of soils. Liming and mineral fertilization significantly modify transformations of nitrogen compounds in soil. The aim of our experiment was to evaluate the influence of liming and ammonium sulphate or calcium nitrate fertilization on the content of total nitrogen and its mineral forms in soil. The study was based on chemical analysis of the soil material obtained from a twoyear pot experiment. The design of the experiment comprised 9 treatments in 4 replications on acidic soil and an analogous number of trials on limed soil. The experimental factors were: liming (acidic soil, limed soil), fertilization with ammonium or nitrate nitrogen at two levels (N1, N2) as well as fertilization with phosphorus at two levels (P1, P2). Liming was applied only once, before setting the experiment. The mineral fertilizers were applied every year before plant sowing in the form of fertilizers: ammonium sulphate, calcium nitrate and triple granulated superphosphate. The test plant was spring barley, which was harvested at its full ripeness. The results indicated that the biggest influence on the N-NH4 content was produced by liming and fertilization with nitrogen. The application of calcium carbonate as well as calcium nitrate led to a decrease in the ammonium nitrogen content in soil. The content of nitrate nitrogen was higher in objects fertilized with calcium nitrate than in those fertilized with ammonium sulphate. Liming and nitrogen fertilization had the largest effect on the formation of mineral nitrogen content in soil. Liming contributed to decreased mineral nitrogen amounts in soil. A reverse situation was observed after increasing the rates of fertilization. The application of calcium carbonate and nitrate form of nitrogen contributed to a decrease in the total nitrogen content in soil. This fact can be explained by increased yield of spring barley in the objects limed and fertilized with calcium nitrate compared with the barley yield in the non-limed and ammonium sulphate fertilized trials.
4

Effect of acidification on feedind in guppy fish [Lebistes reticulatus vel Poecilia reticulata]

84%
Urban-Jezierska E.
Polish Journal of Ecology
|
2002
|
tom 50
|
nr 1
The response of four categories of the fish Lebistes reticulatus (young fishes, females with embryos and without embryos, and males) to 24-h exposure in stream waters that differed in pH: water I, pH = 6.01-6.25, water II, pH = 4.36-4.55, and water III, pH = 4.11-4.39 was examined. Tap water - water 0 (pH = 7.54-8.26) was considered as control. In strongly acidified water, the metabolism of L. reticulatus was modified. Mainly proteins were digested, and lipids were cumulated in faeces, increasing their energy content by 4-36% per mg dry weight as compared with the energy content of food. The excretion of ammonium considerably increased, implying that the oxidisation of proteins increased in the process of respiration. Oxygen consumption increased with acidification only in young fishes.
5

Influence of some soil chemical and physical properties on the ammonium nitrogen leaching and ammonia volatilization in the laboratory experiment

84%
Spychaj-Fabisiak E., Murawska B.
Zeszyty Naukowe. Akademia Techniczno-Rolnicza w Bydgoszczy. Rolnictwo
|
1999
|
tom 44
6

Zmiennosc zawartosci roznych form azotu w wodzie srodpolnego oczka wodnego

67%
Fiedler M.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2004
|
tom 03
|
nr 1
95-100
7

Functioning of the Lake Rusałka ecosystem in Poznań (Western Poland)

51%
Goldyn R., Podsiadlowski S., Kowalczewska-Madura K., Dondajewska R., Szelag-Wasielewska E., Budzynska A., Domek P., Romanowicz-Brzozowska W.
Oceanological and Hydrobiological Studies
|
2010
|
tom 39
|
nr 3
8

Jakosc wod powierzchniowych i gruntowych w malej zlewni lesnej

51%
Liberacki D.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2004
|
tom 03
|
nr 1
87-94
9

Aktualny stan rybackich wod srodladowych na Ukrainie i niektore sposoby jego polepszenia

43%
Grinzevskij M., Andrjusenko A., Kurockin I.
Biuletyn Informacyjny. Instytut Zootechniki
|
2000
|
tom 38
|
nr 4
91-100
10

Stezenia i ladunki wybranych skladnikow wnoszonych z opadami i odplywajacych z mikrozlewni podgorskiej

43%
Ostrowski K., Kowalik T., Rajda W., Piorecki M.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2005
|
tom 04
|
nr 1
25-35
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