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Influence of moisture content on the angle of repose of nitrogen fertilizers

100%

Turan J., Findura P., Djalovic I., Sedlar A., Bugarin R., Janic T.

International Agrophysics

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2011

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tom 25

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nr 2

2

The effect of nitrogen fertilizer form on the content of sixteen elements in red cabbage

86%

Smolen S., Sady W.

Acta Scientiarum Polonorum. Hortorum Cultus

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2008

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tom 07

|

nr 1

Various forms of nitrogen fertilizer were applied in the cultivation of red cabbage (in the years 2003–2005), ‘Langendijker’ c.v.: control (unfertilized with nitrogen), Ca(NO3)2 , (NH4)2SO4 , NH4NO3 , CO(NH2)2 applied as solid fertilizers. This experiment aimed at determining the influence of various nitrogen forms on the content of Al, B, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb, Sr, Ti, Zn, V in cabbage heads and the changes in the content of the available form of these elements for plants in soil after cabbage cultivation. The heads of plants fertilized with calcium nitrate and urea were characterized by the highest content of Al, Mn, Sr, Zn, Cd and Mo. Urea caused a significant increase in the content of Cu, Li and V, while ammonium nitrate resulted in an elevated level of Fe and Co accumulation in cabbage heads. Fertilization with (NH4)2SO4 led to a substantial decrease in the content of Al, Mo and V, and fertilization with NH4NO3 caused a decline in Sr concentrations in cabbage in comparison with other objects of the experiment. Each nitrogen fertilizer resulted in the decreased concentrations of Ti in cabbage heads. Applied nitrogen fertilizers significantly influenced the contents of readily soluble forms of B, Fe and Pb in soil after cabbage cultivation.

3

Nitrogen fertilizer advisory system and monitoring in Hungary

86%

Loch J., Szabo Emese B., Pirko B.

Nawozy i Nawożenie

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2009

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nr 37

4

Using crop nitrogen response functions in fertilizer recommendation at field and farm level

86%

ten Berge H., Fotyma E., Cermak P., Bujnovski R., Karklins A., Bos J.

Nawozy i Nawożenie

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2001

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tom 03

|

nr 2[07]

5

Effect of water stress and nitrogen fertilizer on herb and essential oil of oregano

86%

Said-Al A. H. A. H., Omer E. A., Naguib N. Y.

International Agrophysics

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2009

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tom 23

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nr 3

269-275

6

Recommendation systems for nitrogen - a review

86%

MacKenzie G. H., Taureau J.-C.

Nawozy i Nawożenie

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2001

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tom 03

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nr 4[09]

7

The effect of soil contamination with diesel oil and petrol on the nitrification process

86%

Kucharski J., Tomkiel M., Boros E., Wyszkowska J.

Journal of Elementology

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2010

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tom 15

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nr 1

111-118

The effect of soil contamination with diesel oil and petrol on the nitrification process was investigated in a laboratory experiment. Samples of typical brown soil developed from loamy sand, of pH of 6.6 in 1M KCl, Hh -11.38 mmol+ kg-1 soil, S — 77.67 mmol+ kg-1 soil and Corg - 8.50 g kg-1 were analyzed. The experiment was performed in three replications, and for each test 100 g air-dry soil sample was placed in 150 cm3 beakers. Soil samples were contaminated with diesel oil and petrol with the addition of rapeseed oil and ethanol. The source of nitrogen was ammonium sulfate in the amount of 0 and 250 mg N per kg-1 soil. The content of N-NO3- and N-NH4+ was determined on experimental days 14, 28 and 42. Soil moisture was kept constant at 50% capillary water capacity throughout the experiment. Fertilizer nitrogen was subject to strong immobilization in soil contaminated with diesel oil and petrol. Both pollutants strongly inhibited the nitrification process. Diesel oil had a much stronger inhibitory effect on nitrification than petrol. Rapeseed oil also proved to be a powerful inhibiting factor. On experimental day 42, diesel oil reduced ammonium cation oxidation by 99%, and petrol - by 88%.

8

The implementation of recommendations and restrictions for using nitrogen fertilizers in Estonia

86%

Loide V., Koster T., Penu P., Rebane J.

Nawozy i Nawożenie

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2009

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nr 37

9

Effect of the change of accompanying cation of mineral nitrogen fertilizers on soil physical properties

86%

Becher H. H.

International Agrophysics

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2005

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tom 19

|

nr 2

10

The effect of nitrogen fertilizers on yield and biological value of Chinese cabbage grown in spring season

86%

Krezel J., Kolota E.

Vegetable Crops Research Bulletin

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2001

|

tom 55

11

Stress response of mechanically damaged cabbage during short-term storage as related to applied nitrogen fertilizers

86%

Leja M., Wojciechowska R., Rozek S., Mareczek A.

Folia Horticulturae

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1999

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tom 11

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nr 2

12

Variable nitrogen application based on crop sensing

72%

Wollring J., Reusch S., Karlsson C.

Nawozy i Nawożenie

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2001

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tom 03

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nr 4[09]

13

Suitability of some nitrogen fertilizers for the cultivation of early cabbage

72%

Chohura P., Kolota E.

Journal of Elementology

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2014

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tom 19

|

nr 3

Early cabbage was grown in a field experiment in two treatments, with and without weed control, to test the following fertilizers: ammonium nitrate and Entec 26-a, a new formula nitrogen fertilizer containing a DMPP nitrification inhibitor, applied in single preplant or split doses, and calcium cyanamide (Perlka), supplied only prior to the planting of cabbage. All the sources of N were used in amounts supplying 150 kg N ha-1. The fertilizer Perlka was applied 2 weeks before planting cabbage transplants, while Entec 26 and ammonium nitrate were introduced to soil 3 days before that. All the fertilizers were incorporated into the soil by harrowing. In the treatments with split N application, top dressing was conducted just after the cabbage plants were uncovered, which took place 3-4 weeks after transplanting. The experiment was established in a one factorial design with four replications. The results proved high efficiency of nitrogen fertilization, which – when applied at a dose of 150 kg N ha-1 - enhanced the yield of early cabbage by about 50% compared to the treatment without N fertilization and weed control. Ammonium nitrate and Entec 26 appeared to be equally valuable sources of this nutrient, both in single and split doses, in each year of the investigation. Calcium cyanamide produced the highest marketable yield of heads with a significantly lower mean content of nitrates in edible parts. Another big advantage of this N source is its high efficiency in reducing weed infestation during the whole vegetation period.

14

The effect of nitrogen fertilizer form and foliar application on the concentrations of twenty-five elements in carrot

72%

Smolen S., Sady W.

Folia Horticulturae

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2009

|

tom 21

|

nr 1

3-16

15

Biodiversity Versus stability: the biological effect of plant functional traits on ecosystem functioning in grasslands dominated by Leymus chinensis

72%

Zhao N., Shao X., Wang K.

Polish Journal of Ecology

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2016

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tom 64

|

nr 3

Although diversity-ecosystem theory predicts that ecosystem functioning is strongly determined by species number, species traits play an important role in regulating ecosystem-level dynamics. We analyze responses of species attributes to diversity level and resource availability, and explore their consequences for ecosystem functioning and ultimately assess the contributions of five traits (vegetative plant height, clonal growth, root depth, cespitose habit and seed mass) to ecosystem functioning defined by spatial stability of community biomass. We found that functional traits disproportionately affected spatial stability. Relationships between species functional traits and spatial stability of community biomass indicated that diversity of vegetative plant height facilitated stability of a nitrogen fertilized undisturbed natural community (NAT), and that of a phosphorus fertilized forb, legume and bunchgrass community (FLB). The clonal growth form was also identified as a stabilizing trigger for a unfertilized undisturbed natural community (NAT), whereas diversity in root depth, cespitose habit and seed mass were related to destabilization of a nitrogen fertilized rhizomatous grass community (RRR). Studies quantifying interactions among plant traits, community structure and ecological functioning will contribute much more to understanding of the effects of the ecological behavior of specific traits on the ecosystem functioning.

16

The influence of synthetic fertilizers on seed germination and early growth of Hordeum vulgare L.

72%

Aliloo A. A.

Electronic Journal of Polish Agricultural Universities. Series Agricultural Engineering

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2017

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tom 20

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nr 4

17

Application of nitrogen fertilizer on plant density, growth, yield and fruit of bell peppers (Capsicum annuum L.)

72%

Bhuvaneswari G., Sivaranjani R., Reetha S., Ramakrishan K.

International Letters of Natural Sciences

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2014

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tom 08

|

nr 2

The present research was carried out to evaluate response of Bell peppers (Capsicum annuum L.) to plant density and nitrogen fertilizer under field conditions. Plant density at four levels (20×50 cm, 30×50 cm, 20×100 cm and 30×100 cm) and nitrogen treatments at four levels (0, 50, 100 and 150 kg·N·ha-1) were applied. Plant height, lateral stem number, leaf chlorophyll content, yield, and were assessed at immature and mature stages. The results showed that vegetative growth characteristics (plant height, lateral stem number and leaf dry matter) and reproductive factors (fruit volume and fruit weight) decreased with increasing plant density, but total yield (kg·ha-1) increased with increasing plant density. The highest and lowest total yields were obtained by plant density 20×50 cm and 30×100 cm respectively. Nitrogen fertilizer was significantly affected on plant height, lateral stem number and leaf chlorophyll content. It was observed that fertilization with 150 kg·N·ha-1 resulted to the highest fruit volume and plant yield. There were significant differences between fruit volume and fruit weight by interaction between plant density and nitrogen treatments.

18

Evaluation of yield, yield components and some physiological and qualitative traits of corn affected by chemical and biological nitrogen fertilizers

72%

Kordi S., Ghanbari F.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

|

nr 1

In order to evaluate the yield, yield components and some physiological and qualitative traits of corn treated with nitrogen fertilizers (biological, chemical and integrated), a field experiment was conducted at the Agricultural Research Station of Khorramabad during 2016 growing season. Treatments were arranged in a complete randomized block design with four replications. Experimental treatments consisted of 100% chemical fertilizer (urea), bio-fertilizer (nitroxin), integration of bio-fertilizer + 25% chemical fertilizer, integration of bio-fertilizer + 50% chemical fertilizer, integration of bio-fertilizer + 75% chemical fertilizer and the control. Results showed that the effect of different treatments of fertilizers on all measured traits, except for number of rows in each ear and carotenoids, was significant. The results indicated that integration of bio-fertilizer + 75% chemical fertilizer affected the highest grain yield (9.31 t ha–1), dry biological yield (20.96 t ha–1), number of kernels in each row (41.67), plant height (201.02 cm), hectoliter weight (0.82 g cm–3), chlorophyll b (0.43 mg g–1 FW), total chlorophyll (1.1 mg g–1 FW) and leaf area index (LAI) (4) and there was no significant difference among this treatment and 100% chemical fertilizer (N) and integration of bio-fertilizer + 50% chemical fertilizer treatments in all measured traits. The greatest harvest index (45.8) and grain protein-content (9.1%) resulted from the integration of biofertilizer + 50% chemical fertilizer treatment. Also the highest 1000-grains weight (281.13 g) and chlorophyll a (0.66 mg g–1 FW) were caused by 100% chemical fertilizer (urea) treatments. Results showed that integration of bio-fertilizer + chemical fertilizer could be considered as a means to reduce the consumption of chemical fertilizers for sustainable agriculture.

19