Wyniki wyszukiwania - AGRO

1

Effect of plant density on yielding of red cabbage

100%

Tendaj M., Kuzyk K.

Vegetable Crops Research Bulletin

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2001

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tom 54

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nr 2

2

Response of greenhouse tomato to increased plant densities and defoliation

88%

Miszalski Z., Mydlarz J., Libik A.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1989

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tom 37

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nr 4-6

3

Effect of plant density on the yield and quality of broccoli

88%

Knaflewski M., Spizewski T.

Vegetable Crops Research Bulletin

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2001

|

tom 55

4

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Characterising root density of peach trees in a semi-arid Chernozem to increase plant density

75%

Paltineanu C., Septar L., Gavat C., Chitu E., Oprita A., Moale C., Calciu I., Vizitiu O., Lamureanu G.

International Agrophysics

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2016

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tom 30

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nr 1

5

The yield of indeterminate and determinate cultivars of white lupin (Lupinus albus L.) depending on plant density

75%

Borowska M., Prusinski J., Kaszkowiak E., Olszak G.

Acta Scientiarum Polonorum. Agricultura

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2017

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tom 16

|

nr 2

6

The influence of cultivation method on the flowering of Salvia horminum L. 'Oxford Blue'

75%

Pogroszewska E., Laskowska H.

Acta Agrobotanica

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2008

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tom 61

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nr 1

Salvia horminum L.) ‘Oxford Blue’ was grown from transplants or it was direct seeded. Four sowing dates were applied: 15 March or 30 March – in a greenhouse, in order to obtain transplants, 13 April, 27 April and 11 May – sown directly into the ground. Three plant densities were applied: 25 plants x m2, 16 plants x m2, 12 plants x m2. It was found that Horminum sage can be grown from transplants or direct seeded. The cultivation from transplants is more advantageous due to the earlier flowering of plants, by about two weeks, and a better quality of inflorescences evaluated in terms of their length and size of bracteoles. Direct sowing of Horminum sage at two-week intervals from the 2nd decade of April till the 2nd decade of May ensures that by the end of August mature inflorescence stems are obtained, ready for cutting. A delay in the date of sowing results in the development of signifi cantly shorter inflorescence stems, irrespective of the plant density. Plant density does not affect signifi cantly the length of the period of inflorescence formation and the date of flowering, but a larger spacing is favourable to plants growing big, what results in a larger fresh weight of the above-ground portion. Sage grown from transplants responses to favourable climatic conditions by the development of bigger infl orescences.

7

The effect of winter wheat [Triticum aestivum] plant density on the yield and its components

75%

Bavec M.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

8

Sensitivity of winter wheat cultivars to selected herbicides

63%

Kieloch R., Rola H.

Journal of Plant Protection Research

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2010

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tom 50

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nr 1

35-40

The experiments on tolerance of winter wheat cultivars to herbicides were performed under field conditions during 2003-2005 in the region of Wrocław (South-West of Poland). Five cultivars were examined (Zyta, Tonacja, Sukces, Clever, Kobra). Two herbicide mixtures: isoproturon + pendimethalin and diflufenican + flurtamon were applied in the autumn, in stage of 3-4 leaves. In the spring, when wheat reached stage of full tillering, the following herbicides were used: florasulam + 2.4-D and fluroxypyr + 2.4-D. Phytotoxicity of herbicides was determined on the base of plants vigour assessment, plants counting, yield and some yield components. During the experimental period, impact of the mixture pendimethalin + isoproturon on grain yield of Clever cultivar was observed only in the season with hard winter conditions (2002/2003). The remaining varieties: Zyta, Tonacja, Sukces and Kobra were completely tolerant to this herbicide mixture. Mild winter seasons did not show a negative influence of herbicides on grain yield of tested varieties. All cultivars showed a complete tolerance to diflufenican + flurfamon and florasulam + 2.4-D. The mixture fluroxypyr + 2.4-D caused ear deformation of all tested wheat cultivars, but did not affect negatively grain yield.

9

Influence of plant density and term of harvest on yield and chemical composition of sweet marjoram (Origanum majorana L.)

63%

Nurzynska-Wierdak R., Dzida K.

Acta Scientiarum Polonorum. Hortorum Cultus

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2009

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tom 08

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nr 1

The experiments carried out in 2006–2007 referred to the growth of marjoram plants, its yields and chemical composition depending on the plant density and harvest time. Four plant densities (setting spacing 20 × 40 cm, 30 × 30 cm, 30 × 40 cm and 40 × 40 cm) as well as two harvest times (beginning of flower bud forming and full blooming) were applied. The lowest density favored the plant tillering, which apparently affected the herb yield. Plants growing at the lowest density (40 × 40 cm spacing) had the largest fresh and air-dried herb yields (0.71 and 0.18 kg m⁻², respectively). Herb of plants grown at denser spacing contained more total nitrogen and nitrates (V) as well as less potassium, than that of plants grown at lower density. The herb harvest at full flowering stage turned out to be favourable because of significantly lover nitrates concentration as compared to other stages. The contents of essential oil was significantly higher in the full flowering stage than in those harvested in the bud formation stage. Plants growing at denser spacing produced more oil. Trans-sabinene hydrate and terpinene-4-ol were dominating components of marjoram essential oil.

10

Influence of crop rotation and meteorological conditions on density and biomass of weeds in spring barley (Hordeum vulgare L.)

63%

Wanic M., Jastrzebska M., Kostrzewska M. K.

Acta Agrobotanica

|

2010

|

tom 63

|

nr 1

The paper presents the analysis of changes in weed infestation in spring barley cultivated in the years 1990–2004 in crop rotation with a 25% proportion of this cereal (potato – spring barley – sowing peas – winter triticale), when it was grown after potato, and in crop rotation with its 75% proportion (potato – spring barley – spring barley – spring barley), when it was grown once or twice after spring barley. In the experiment, no weed control was applied. Every year in the spring (at full emergence of the cereal) and before the harvest, the composition of weed species and weed density of particular weed species were determined, and before the harvest also their biomass. Weed density increased linearly on all plots during the 15-year period. The average values confirm the increase in weed biomass in the case when spring barley was grown once or twice after this crop; however, those differences were influenced by the previous situation only during some seasons. Weed density and biomass showed high year–to–year variability and a positive correlation with the amount of precipitation and a negative correlation with temperature during the period of the study. A negative correlation between the yield of barley and weed biomass was shown.

11

Effect of plant density and irrigation upon yield and selected technological features of some celeriac [Apium graveolens L. var. rapaceum] cultivars

63%

Rozek E.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2009

|

tom 08

|

nr 4

During the studies conducted in the years 2004–2005, in the Experimental Farm „Felin” of the University of Life Sciences in Lublin we assessed the effect of irrigation and plant density upon the yield and selected technological features (mean weight of root and the occurrence of empty spaces) in a few currently grown celeriac cultivars. A significant influence of the examined factors upon the quantity and quality of celeriac yield was demonstrated. On average, for the study years, the yield of non-watered plants ranged from 34.7 to 48.8 t ha⁻¹ and the yield of watered plants – from 47.1 to 66.3 t ha⁻¹. The increased plant density from 37.0 thousand pcs. to 55.6 thousand pcs. ha⁻¹ enabled us to obtain greater yield of non-watered plants by 15.6%, and of watered plants – by 21.5%. The examined factors affected the mean weight of root in the assessed celeriac cultivar, the sizes of empty spaces occurring in them, as well as the participation of roots with empty spaces in the marketable yield.

12

Comprehensive analysis of soil nitrogen removal by catch crops based on growth and water use

63%

Yasutake D., Kondo K., Yamane S., Kitano M., Mori M., Fujiwara T.

International Agrophysics

|

2016

|

tom 30

|

nr 3

13

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

63%

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

International Letters of Natural Sciences

|

2014

|

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.

14

Selected technical parameters of juvenile wood in Scots pine (Pinus sylvestris L.) – variation between social classes of tree position in the dominant stand

63%

Tomczak A.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2013

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tom 12

|

nr 4

The study compared basic density, compressive strength along the grain, static bending strength and modulus of elasticity of juvenile wood in pines from different Kraft’s classes. Analyses were conducted in 8 mature pine monocultures in north-western Poland. In each experimental site a total of 9 trees were selected, thus the analyses were conducted on 72 model trees (with 24 for each social class of tree position in the stand). The highest values of analysed technical parameters were recorded for wood of co-dominant trees, the lowest were found for predominant trees, while intermediate values were recorded for wood of dominant trees. All the reported differences were statistically significant. Similar dependencies were observed when comparing wood from different sections of stems, with the greatest disproportions, frequently statistically significant, found in their lower sections.

15

Wplyw obsady roslin na plonowanie rzepaku ozimego

63%

Cichy H., Cicha A., Starzycki M., Rybinski W.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

|

2006

|

nr 242

225-232

16

The effects of different methods of cultivation and plant spacing on the chemical composition of broccoli heads

63%

Grabowska A., Kunicki E., Libik A.

Folia Horticulturae

|

2009

|

tom 21

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nr 2

25-34

17

Response of winter rapeseed to biostimulator application and sowing method. Part I. Field architecture elements

63%

Sikorska A., Gugala M., Zarzecka K.

Acta Scientiarum Polonorum. Agricultura

|

2018

|

tom 17

|

nr 4

18

Nitrogen content and uptake by spring wheat and undersown Persian clover depending on plant density

63%

Wanic M., Mysliwiec M., Orzech K., Michalska M.

Journal of Elementology

|

2016

|

tom 21

|

nr 1

In 2010-2012, a pot experiment was conducted in order to assess the impact of a sowing method and density of spring wheat and Persian clover on their uptake and content of nitrogen in different parts of the plants. The plants were grown in the following variants: a mixture, pure sowing, higher density (recommended in agricultural practice) and density reduced by 20%. Observations were performed in the following wheat development growth stages (BBCH): leaf development (12-14), tillering (21-23), stem elongation (31-32), inflorescence emergence (54-56) and ripening (87-89). The experiment included determinations of dry matter in different parts of plants (aerial organs, roots) and of the nitrogen content in dry matter. Based on the results, the total nitrogen content was determined in both species. The data were also used to calculate nitrogen translocation from the wheat vegetative mass to grain, and to calculate selected competition indicators. It was demonstrated that - regardless of the density of plants - the nitrogen uptake by spring wheat and Persian clover in the mixed sowing was lower than in the pure sowing treatment. Mixed sowing caused a more limited nitrogen uptake by the aerial parts of both species than by their roots. No impact was demonstrated of the plant density on the nitrogen uptake by different parts of spring wheat. Persian clover in pots with the lower sowing density absorbed less nitrogen than in pots with the recommended density. Nitrogen translocation from the vegetative parts to the grain of spring wheat between the inflorescence emergence and ripening stages was more effective in the mixture than in the pure sown plants. In mixed sowing, after nitrogen uptake, wheat proved to be a stronger competitor than Persian clover during the whole plant growing period.

19

Research on plant spacing relationships and yields of crops by sowing seeds at exact intervals

63%

Cesnieks A., Vilde A., Tanas W.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

|

2006

|

tom 06

20

Yield of the aboveground parts and tubers of Jerusalem artichoke (Helianthus tuberosus L.) depending on plant density

63%

Szpunar-Krok E., Bobrecka-Jamro D., Grochowska S., Buczek J.

Acta Scientiarum Polonorum. Agricultura

|

2016

|

tom 15

|

nr 3

In the years 2010-2012 the effect of plant density was studied on the yield of the aboveground parts and tubers of Polish cultivars of Jerusalem artichoke, Albik and Rubik. The experiment was carried out on a light soil of a good rye complex in a randomized block design. The experimental factors included: I) Jerusalem artichoke cultivars: Albik, Rubik, II) plant density: 2, 4, 6, 8 plants·mˉ². Cvs. Albik and Rubik, on average over the three years of research, did not differ in the dry matter yield of the aboveground parts and tubers. In the year with a higher rainfall total during growing season, cv. Albik gave higher yields, while in the year with a dry spell from July to September, cv. Rubik yielded higher. With a density of 6 and 8 plants·mˉ² the dry matter yield of the aboveground parts was significantly higher compared with a density of 2 plants·mˉ². The lowest tuber yield was obtained at a density of 2 plants·mˉ², a significantly higher one at a density of 4 plants·mˉ². Increasing plant density from 4 to 6 or 8 plants·mˉ² did not result in an increase in the tuber yield. Increasing density from 2 or 4 plants·mˉ² to 6 or 8 plants·mˉ² caused a decrease in the number and weight of tubers per plant as well as in the average weight of a single tuber.

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