scholarly journals Experiments on dialog models of prognosis of the population density of Globodera rostochiensis in soil at different types of crop rotation

2021 ◽  
Vol 839 (3) ◽  
pp. 032047
Author(s):  
Aleksander A Shesteperov ◽  
Viktor Ya Shubaderov ◽  
Tatiana A Vasileva
Keyword(s):  
Population Density ◽  
Crop Rotation ◽  
Globodera Rostochiensis ◽  
Different Types

Canadian Exceptionalism: Explaining Differences over Time in Provincial and Federal Voter Turnout

2001 ◽  
Vol 34 (2) ◽  
pp. 299-319 ◽  
Author(s):  
Donley T. Studlar
Keyword(s):  
Regression Analysis ◽  
Population Density ◽  
Multiple Regression Analysis ◽  
Voter Turnout ◽  
The Political ◽  
Federal Level ◽  
Industrial Democracies ◽  
Different Types ◽  
Over Time ◽  
Cross National

Canada is unusual among advanced industrial democracies in having some provinces which regularly have greater voter turnouts for provincial than for federal elections. Provincial and federal turnouts by province in Canada are analyzed for the 1945-1998 period using multiple regression analysis, both for each set of elections and by comparing differences between the two. Federal turnout has declined over the years but provincial turnout appears to have increased slightly. Although the effects found here largely confirm previous findings about the relative effects of different types of variables found for the Canadian federal level only, several of the political explanations previously supported in cross-national research find less support. Instead, region, population density, months since the last federal or provincial election, and season of the year generally have greater and sometimes more consistent effects. This suggests the need for more studies of turnout in democracies at sub-central levels.

POTASSIUM BALANCE IN THE SOIL AND THE EFFECTIVENESS OF POTASSIUM DEFICIENCY SYSTEM OF FERTILIZATION

2020 ◽  
Vol 2 ◽  
pp. 56-61
Author(s):  
Н. M. Hospodarenko
Keyword(s):  
Crop Rotation ◽  
Spring Barley ◽  
Barley Straw ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Field Crop ◽  
Heavy Loam ◽  
Different Types ◽  
Loam Soil ◽  
The Right

The influence of long-term application of different doses and ratios of mineral fertilizers in field crop rotation on the content of basic nutrients in grain and straw of spring barley has been established. The study was held in the conditions of podzolic black heavy loam soil of the Right-Bank Forest-Steppe of Ukraine. The relative nutrients removal by spring barley depending on the doses of different types of fertilizers and their combinations in the field crop rotation is calculated. It is shown that the content of basic nutrients in the harvest of spring barley (grain and straw) significantly depends on the content of their mobile compounds in the soil. This is especially true of nitrogen and less of potassium. Economic removal of nutrients from the grain harvest of spring barley depends on the doses of fertilizers in the field crop rotation and the ratio of nutrients in them. The largest share is nitrogen (65–122 kg / ha), followed by K2O - 47–92 and P2O5 26–51 kg / ha. From 1 ton of grain and the corresponding amount of straw, spring barley of the Commander variety removes 19.2–22.4 kg of nitrogen, 7.8–9.2 - P2O5 and 14.0–16.8 kg of K2O from the soil, depending on the fertilizer and saturation of field crop rotation with different types of fertilizers. Straw is an important source of soil organic matter reproduction and the return of nutrients used for crop formation. Depending on the system of fertilization, 17–25% of nitrogen, 25–30% of phosphorus and 68–69% of potassium are returned to the soil with spring barley straw via economic removal. It is specified that spring barley of the Commander variety absorbs N, P2O5 and K2O in the following ratio: 1: 0,4: 0,3 to form a unit of grain yield and the corresponding amount of straw in the conditions of podzolic black heavy loam soil of the Right-Bank Forest-Steppe.

scholarly journals Effect of the product of radiational removal of SO2 and NOx from combustion gases on the population of Globodera rostochiensis nematodes (Woll., Behrens 1975)

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 642-644
Author(s):  
G. Kaup ◽  
K. Janowicz ◽  
K. Paruch
Keyword(s):  
Population Density ◽  
Globodera Rostochiensis ◽  
Combustion Gases ◽  
Growing Seasons ◽  
Second Year ◽  
Lower Population ◽  
Eggs And Larvae ◽  
Lower Population Density

The studies were carried out in a greenhouse of the Agricultural University of Szczecin, during two growing seasons. The aim of this study was determine the effect of the product obtained from radiational SO<sub>2</sub> and NO<sub>x</sub> removal from combustion gases on the populations of Globodera rostochiensis nematodes — one of the most common quarantine organisms. The analysis of the effect of the applied product on the population of nematodes demonstrated their varied character of response. In the combination with the product of radiational purification of combustion gases, also significantly lower population density (number of eggs and larvae in 1 g of soil) and lower fecundity of Globodera rostochiensis females were observed compared to the control combination. And in the second year of the experiment, the number of cysts in the combination with the product of SO<sub>2</sub> and NO<sub>x</sub> removal from combustion gases was significantly lower compared to the control, and was less than half of the quantity of the previous year.

Integrated management of Globodera rostochiensis: a novel biocontrol agent, crop rotation and fallow

2020 ◽  
Vol 127 (5) ◽  
pp. 633-640
Author(s):  
Daniel López-Lima ◽  
Damaris Desgarennes ◽  
Dinorah Lima-Rivera ◽  
Gloria Carrión
Keyword(s):  
Crop Rotation ◽  
Biocontrol Agent ◽  
Integrated Management ◽  
Globodera Rostochiensis

Control of Glyphosate-Resistant Giant Ragweed in Winter Wheat

2015 ◽  
Vol 29 (4) ◽  
pp. 868-873 ◽  
Author(s):  
Kris J. Mahoney ◽  
Kristen E. McNaughton ◽  
Peter H. Sikkema
Keyword(s):  
Population Density ◽  
Winter Wheat ◽  
Crop Rotation ◽  
Weed Management ◽  
Aboveground Biomass ◽  
Field Experiments ◽  
Control Population ◽  
Integrated Weed Management ◽  
Giant Ragweed ◽  
Herbicide Treatments

Four field experiments were conducted over a 2-yr period (2012 and 2013) in winter wheat to evaluate POST herbicides for the control of glyphosate-resistant (GR) giant ragweed. POST herbicides were evaluated for winter wheat injury and GR giant ragweed control, population density, and aboveground biomass. The herbicides used in this study provided 54 to 90% and 51 to 97% control of GR giant ragweed at 4 and 8 wk after treatment (WAT), respectively. At 8 WAT, auxinic herbicide treatments or herbicide tank mix/premix treatments that contained auxinics provided 78 to 97% control of GR giant ragweed. Reductions in GR giant ragweed population density and aboveground biomass were 62 to 100% and 83 to 100%, respectively, and generally reflected the level of control. The results of this research indicate that Ontario, Canada, corn and soybean growers should continue to incorporate winter wheat into their crop rotation as one component of an integrated weed management (IWM) strategy for the control of GR giant ragweed.

scholarly journals The effect of different crop rotation on the fungi compound of pea roots (Pisum sative L. )cv. "Fidelia" and their healthiness

2013 ◽  
Vol 51 (1-2) ◽  
pp. 43-49
Author(s):  
Stanisław Sadowski ◽  
Stanisław Urbanowski ◽  
Róża Maniewska ◽  
A. Sowa
Keyword(s):  
Rhizoctonia Solani ◽  
Crop Rotation ◽  
Seed Yield ◽  
Root Rot ◽  
Different Types ◽  
Pea Roots

Over the years 1991-1993 research was conducted on the effect of three different types of crop rotation (monoculture, 3-year rotation and 5-year rotation) on the fungi compound of pea roots and their healthiness. It was found that I~isarium oxysporum. occured more frequentl~'. F. solani and Rhizoctonia, solani were frequently isolated from plant cultivated in monoculture. On thy contrary in a 5-year rotation fungi belonging to the genus Trichoderma and Gliocladum occerd more frequently. Infestation of roots in monoculture was nearly twice as high as that in crop rotation and the yield was six time lower. In 3-year and 5-year crop rotation difference was not found in the micoflora compound, root rot degree, and seed yield.

scholarly journals THE DYNAMICS OF THE NUMBER OF ORIBATIC MITES ON THE PASTURES OF THE IVANOVO REGION AND THEIR INVASIBILITY OF THE MONISTIA CISTICERCOIDES

2019 ◽  
pp. 221-225 ◽  
Author(s):  
Zhdanova ◽  
Kryuchkova
Keyword(s):  
Population Density ◽  
Preventive Measures ◽  
Soil Surface ◽  
Weather Conditions ◽  
Oribatid Mites ◽  
Different Types ◽  
Dynamics Of Population ◽  
June July ◽  
High Degree ◽  
Natural Grassland

The distribution of mites on the soil surface of different types of pastures, the invasion of oribatids by monies larvae are dependent on climatic and weather conditions of the area, as well as the degree of infection with monies of the grazed livestock of ruminants. Seasonal dynamics of population density of oribatid ticks on natural and artificial pastures of two livestock farms of the Ivanovo region is studied. In soil and grass samples 5 species of shell mites were identified: Scheloribates laevigatus, Scheloribates latipes, Punctoribates punctum, Punctoribates sellnicki and Ceratozetes mediocris, cysticercoid-infested monies. Dominant species were representatives of the genus Scheloribates (65,8%), subdominant – genus Punctoribates (26,7%). The population density of oribatid mites on natural grassland pastures in may averaged 198±17,8 specimens per 1 m2 with cysticercoid monies equal to 3,39%. In June-July, the number of oribatids ranged from 249±23,5 – 298±31,2 specimens on 1 m2 at EI = 4,47–6,9% respectively. The greatest number of oribatids was found in August-September: 343±39,4 – 368±42,4 specimens per 1 m2 at EI = 8,7–9,2%. In October the population density of oribatid mites decreased to 201±28,4 individuals per 1 m2 at EI = 4,54%. Artificial (cultural) pastures, the number of oribatid mites does not exceed 108±9,3 individuals per 1 m2. The contamination of the oribatids with cysticercoids of moniesia on these pastures has not been found. The research results make it possible to assume a high degree of invasion of ruminants by moniesia when grazing them on natural meadow pastures and plan preventive measures.

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