scholarly journals Productivity of the mother root and cutting garden of the pumiselect clone rootstock in the Steppe of Ukraine

2021 ◽  
Vol 109 (1) ◽  
pp. 20-28
Author(s):  
V. Zamorskyi ◽  
◽  
T. Kamedzko ◽  
T. Manushkina ◽  
M. Samoilenko ◽  
...  
Keyword(s):  
Crop Management ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
The State ◽  
Aboveground Part ◽  
Mother Plants ◽  
Number Of Shoots

Productivity of the mother root and cutting garden of the pumiselect clone rootstock in the Steppe of Ukraine The dynamics of productivity of the mother root & cutting garden of the Pumiselect clone rootstock was studied, taking into account the soil and climatic conditions of the steppe zone of Ukraine, as well as technological aspects of crop management. In the first three years of vegetation of mother plants, there was an intensive build-up of the aboveground part of the bushes, which gave rise to transfer them to the state of operational plantings. Taking into account the annual complete alienation of growth in the next 4-9 years, significant aging of plants occurred, which was manifested in a decrease in habitus indicators, the number of shoots and their length. As a result, the productivity of mother root plantings decreased (the number of cuttings from 570.2 thousand units)/ha up to 133.6 thousand units/ha), which limited the feasibility of long-term cultivation in order to obtain lignified cuttings. Keywords: Pumiselect, clone rootstock, mother root plantings, shoots, biometric characteristics, lignified cuttings.

The Khāliṣah of Varamin

1993 ◽  
Vol 25 (1) ◽  
pp. 5-15 ◽  
Author(s):  
Mansoureh Ettehadieh Nezam-Mafi
Keyword(s):  
Civil War ◽  
Land Tenure ◽  
General Pattern ◽  
Land Ownership ◽  
Climatic Conditions ◽  
The State ◽  
Regional Variations ◽  
Long Period ◽  
The Government

The history and development of land tenure in Iran have been affected by many factors, including climatic conditions, scarcity of water, lack of security, widespread tribalism, and legal and administrative confusion. In addition to limitations in resources, political instability in the premodern period molded systems of land tenure in Iran. Changes of dynasty were frequent and usually followed by the confiscation and redistribution of land. The Qajar dynasty (1788–1925), which came to power after a long period of anarchy and civil war, continued that general pattern. There were three classes of land ownership in Iran in this period: waqfs (religious endowments), arbābī (land owned by large landlords), and khāliṣah (state-owned lands). This last category was composed of lands confiscated by the government as punishment for rebellion or failure to pay taxes. As land was often the only form of wealth landlords had, the threat of government confiscation was an instrument of control as well as a source of revenue for the state. The khāliṣah were usually rented out on long-term leases or were granted as ṭuyul, that is in lieu of services rendered or salaries deferred. The khāliṣah were also in some instances farmed directly by the government. These lands were cultivated by peasants under conditions similar to those of the arbābī lands. They were scattered throughout the country and were also subject to various local and regional variations in agricultural taxes.

scholarly journals The role of variety and forecrop in the population dynamics of Rhizoctonia solani in soil

2021 ◽  
Vol 51 (1) ◽  
pp. 25-32
Author(s):  
A. A. Malyuga ◽  
N. S. Chulikova
Keyword(s):  
Population Dynamics ◽  
Rhizoctonia Solani ◽  
Growing Season ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Forest Steppe ◽  
The Difference ◽  
Two Peaks

Long-term studies (2014–2019) of the population dynamics of the fungus Rhizoctonia solani Küch. were carried out in the soil on the Purple Majesty, Vitelotte and Fioletovy potato varieties and preceding crops (potatoes, oats and tendergreen). The study was carried out in Novosibirsk region in the soil and climatic conditions typical of the forest-steppe zone of Western Siberia. To study the peculiarities of R. solani fungus population dynamics in potato plantations, soil samples were taken from under the plants during the entire growing season. The accumulation of rhizoctonia propagules in the soil was determined using the method of multiple soil pellets. The difference in the amount and rate of accumulation of the fungus R. solani on different varieties, as well as the influence of previous crops on this process, was established. Two peaks of the fungus accumulation were observed on the Purple Majesty variety: the first (48.7 propagules/100 g of soil) – during the full germination period, the second (57.2 propagules/100 g of soil) – at the end of the crop maturation phase. One peak was observed in the population dynamics of the fungus on Vitelotte and Fioletovy varieties, at the end of the ripening period (59.0 and 49.1 propagules/100 g soil, respectively). The smallest amount of R. solani fungus in the soil on average during the growing season was noted on the Fioletovy variety – 33.3 propagules/100 g of soil. In the Purple Majesty and Vitelotte varieties, this figure was 41.5 and 40.4 propagules/100 g of soil, respectively. When potato variety Agata was cultivated as monoculture, there was a rapid and significant accumulation of the fungus R. solani in the soil (from 34.6 to 126.8 propagules/100 g of soil). When this variety was cultivated following tendergreen or oats, the amount of the pathogen varied to a lesser extent (25.1–52.2 and 19.8–41.0 propagules/100 g of soil, respectively). No sharp increases in the number of propagative structures of the phytopathogen in the soil were noted.

scholarly journals Influence of changes of climate on the productivity of pratal and steppe vegetation in the Forest-steppe area of Ukraine

2019 ◽  
Vol 2019 (1) ◽  
pp. 18-29
Author(s):  
A. M. Polevoy ◽  
L. E. Bozhko ◽  
E. A. Barsukova
Keyword(s):  
Climate Change ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Natural Fertility ◽  
Forest Steppe ◽  
Climate Change Scenarios ◽  
Potential Productivity ◽  
Steppe Vegetation ◽  
Yield Capacity

The influence of the climate change on the agro-climatic growth conditions, development and formation of productivity of meadow and steppe vegetation in the forest-steppe zone of Ukraine for three periods has been studied: 2021–2030, 2031–2040, 2041–2050. The calculations of the expected conditions have been performed according to the climate change scenarios RCP4.5 and RCP8.5. The paper provides an assessment of the agro-climatic conditions for the formation of productivity of meadow and steppe vegetation in the current global warming and further climate change conditions until 2050. The assessment has been performed by comparing the average long-term agro-climatic indicators (1980–2010) of the productivity of wild phytocenoses with the same indicators for the future over decades. The calculations of both average long-term productivity of grasses and productivity of grasses in the conditions of climate change are executed according to four types of productivity: potential productivity which in case of optimum maintenance of plants with heat, moisture and mineral food is defined by solar radiation; meteorologically possible yield, which is provided by the temperature regime and the regime of humidification of the territory; really possible yield capacity, which is provided by the natural fertility of the soil; actual yield capacity in the natural conditions. Key words: meadow, steppe vegetation, productivity, humus balance, photosynthetic potential, agroecological categories of yields, climate change.

scholarly journals New data about the Orlovskaya culture household in the steppe Volga region

2021 ◽  
Vol 10 (2) ◽  
pp. 136-140
Author(s):  
Aleksandr Alekseevich Vybornov ◽  
Filat Faritovich Gilyazov ◽  
Natalia Sergeevna Doga ◽  
Aleksandr Ivanovich Yudin ◽  
Evheniia Yurievna Yanish
Keyword(s):  
Significant Proportion ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Domestic Dog ◽  
Volga Region ◽  
Faunal Remains ◽  
The Caspian Sea ◽  
Lower Volga Region ◽  
Late Stone Age

Researchers suggest a hypothesis that one of the indicators of the Neolithic is settlements based on stable fishing using boats and nets. The northern part of the Lower Volga region is a steppe zone. The peculiarities of natural and climatic conditions (arid climate, a small number of rivers) predetermined a low population density in comparison with other regions. The location of long-term camps is traced on different rivers on particular distance from each other. This provided normal conditions for life of the Orlovskaya culture representatives. The culture stratification in loam leaded to good preservation of faunal remains. The big archeozoological material was accumulated for reconstruction of these societies household. Hunting was carried out mainly on large ungulates. In addition, waterfowl accounted for a significant proportion. A domestic dog provided assistance in hunting. Finds of bone harpoons and hooks, accumulations of scales and bones of pike and perch are speaking about individual fishing. Stone sinkers, axes and adzes, vertebrae may suggest fishing with a net from a boat or a raft. The absence of sturgeon remains give a thought that the Bolshoi Uzen River didnt flow into the Caspian Sea in the Late Stone Age.

scholarly journals Prevailing forest types in the river catchments within the Left-Bank Forest-Steppe zone, Ukraine

2020 ◽  
Vol 62 (2) ◽  
pp. 100-113
Author(s):  
Oleksandr Bondar ◽  
Maksym Rumiantsev ◽  
Liudmyla Tkach ◽  
Iryna Obolonyk
Keyword(s):  
Forest Management ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
The State ◽  
Forest Steppe ◽  
Left Bank ◽  
Forest Types ◽  
Natural Conditions ◽  
Catchment Areas ◽  
River Catchments

AbstractThe aim of the study was to determine the distribution of prevailing forest types within the catchment areas of the biggest rivers in the north-east of Ukraine. During the allocation of the catchment areas of the studied rivers, the MapInfo Professional 12.5 program and the vector map of Ukraine were used. The research covered the forest area (more than 502,000 ha) of the state forest enterprises managed by the State Forest Resources Agency of Ukraine. The studied area located on the tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers within the Poltava, Kharkiv, Sumy, Chernihiv, Kyiv and Cherkasy administrative regions of Ukraine. The analysis of the forest fund was carried out based on the electronic subcompartment database of the Ukrderzhlisproekt Production Association, using the application software and geoinformation technologies. It was revealed that a large variety of forest types in the tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers as well as the prevalence of fresh fertile maple-lime oak and fresh fairly infertile oak-pine forest types (in 75 tributaries of Psel, Vorskla and Siversky Donets rivers) and fresh fertile maple-lime oak and fresh fertile hornbeam oak forest types (in 20 tributaries of the Sula River) are due to the relief, hydrological and soil-climatic conditions of the studied area, as well as anthropogenic factor. Assuming homogeneous natural conditions, an insignificant number of forest types are formed (up to five). For a large variety of natural conditions, there are at least six forest types that should be taken into account during forest management, along with the characteristics of the catchment areas of tributaries. The analysed data on the total number of forest types in the catchments of rivers would be appropriate to use in the future when creating a single list of forest types for the Left-Bank Forest-Steppe zone of Ukraine. The prevalence of certain forest types within the catchment areas of tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers directly depends on the soil and climatic conditions, geomorphological structure, relief and anthropogenic influence in the forests. The results should be used in forest management activities to preserve and restore the species diversity of forests within the river catchments.

scholarly journals Assessment of Vulnerability of Natural Grasslands That Are Used as Pastures: Russia’s Example

2019 ◽  
Vol 11 (2) ◽  
pp. 40
Author(s):  
I. P. Aidarov ◽  
A. A. Zavalin ◽  
Yu. N. Nikolskii ◽  
C. Landeros-Sanchez ◽  
V. V. Pchyolkin ◽  
...  
Keyword(s):  
Animal Husbandry ◽  
Simulation Models ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Projective Surface ◽  
Practical Application ◽  
Pasture Load ◽  
Term Change ◽  
Natural Grasslands

Natural grasslands that are used as pastures have great importance for animal husbandry. Unfortunately, because of various reasons, the productivity of natural pastures can decline with time. The methodology to predict possible long-term change of the basic properties of natural pastures depending on the pasture load is considered in the present paper. The simulation models and the results of their application for the conditions of use of natural pastures in the steppe zone of Russia are presented. The models take into account the following aspects: biodiversity of plant species in the grassland, capacity of ecological niche, vegetation productivity of grassland, climatic conditions, soil fertility, pasture load, surface slope, intensity of water and wind soil erosion, projective surface coverage, and ecological sustainability of the grassland. The analysis resulted from the proposed models in the examples of practical application showed that the described methodology could be used to develop the necessary measures for sustainable and intensive use of natural grasslands.

scholarly journals Selection of high-yielding pea varieties in the conditions of the Cis-Ural steppe zone of the Bashkortostan Republic

2021 ◽  
Vol 36 ◽  
pp. 01007
Author(s):  
Firzinat Davletov ◽  
Karina Gainullina
Keyword(s):  
Agricultural Research ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Local Conditions ◽  
State Register ◽  
Unfavourable Weather ◽  
Significant Yield ◽  
High Yielding Varieties ◽  
Selection Of

Peas have become the most important leguminous crop worldwide. Large areas in Russia are used for pea growing. Unfavourable weather and climatic conditions often lead to a significant yield decline. There is an urgent need to develop new high-yielding varieties adapted to local conditions. The current paper presents the results of long-term breeding of modern pea cultivars Chishminsky 229, Pamiati Hangildina, Pamiati Popova, meeting the requirements of agricultural production. The research was conducted in the Bashkir Agricultural Research Institute. The varieties were bred by repeated single selection based on intervariety hybridization. Chishminsky 229 and Pamiati Hangildina cultivars are included in the State Register of Breeding Achievements. Pamiati Popova is currently undergoing state variety testing. According to the comparative testing in 2016-2020, the excess yield compared to Chishminsky 95 standard variety was 2.1 c/ha for Chishminsky 229 variety, 1.9 c/ha for Pamiati Hangildina cultivar, and 3.2 c/ha for Pamiati Popova cultivar.

scholarly journals Climate change impact on millet productivity in the forest-steppe zone of Ukraine

2020 ◽  
pp. 63-73
Author(s):  
N. V. Danilova
Keyword(s):  
Climate Change ◽  
Steppe Zone ◽  
Climatic Conditions ◽  
Future Climate Change ◽  
Forest Steppe ◽  
Impact Of Climate Change ◽  
Growth Development ◽  
Drought Resistant ◽  
The Impact

Negative impact of climate change on crop yields is already an established fact. This is mainly due to rising temperatures and increasing likelihood of droughts. However, in some regions there is an increase of certain crops yields, especially the drought-resistant ones and this determines the need for research of agro-climatic conditions for formation of such crops' yield. This article presents the results of the study of agro-climatic conditions for formation of millet crops, one of the most drought-resistant crops in the forest-steppe zone of Ukraine, affected by climate change. It considers temperature, radiation and humidification regimes of millet crops. The research of the impact of climate change on the growth, development and formation of millet crops is conducted according to the scenarios of future climate change RCP4.5 and RCP8.5 for a thirty-year period (2021-2050) divided into three decades: 2021-2030, 2031-2040 and 2041-2050. The period from 1986 to 2005 is a basic period. The average long-term agroclimatic data for the forest-steppe zone of Ukraine observed in this period are used. The calculations were performed using the model of crop productivity formation which was modified and adapted to millet crop. The block diagram of the model of millet productivity formation includes blocks of main physiological processes of millet (Panicum miliaceum L.) vital activity: photosynthesis, respiration, growth, development and also includes a hydrometeorological block. It is assumed that the average air temperature will decrease in all three ten-year periods of both scenarios, compared to the accepted long-term averages. The results of calculations showed that in all ten-year periods of both scenarios there is an increase in millet yield compared with the average long-term data (1986-2005). The highest yield is formed according to the RCP8.5 scenario over the period from 2041 to 2050 and is expected at the level of 29.2 c/ha which is 19% higher than the current one.

Power Projects and Covid-19: A Practical Analysis of the Relevance of Force Majeure Clauses under the Standardised Power Purchase and Implementation Agreements of Uganda

2020 ◽  
Vol 1 (2) ◽  
pp. 189-193
Author(s):  
Aisha Naiga ◽  
Loyola Rwabose Karobwa
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
The State ◽  
Energy Sources ◽  
Policy Goals ◽  
Force Majeure ◽  
Practical Analysis ◽  
Energy Justice

Over 90% of Uganda's power is generated from renewable sources. Standardised Implementation Agreements and Power Purchase Agreements create a long-term relationship between Generating Companies and the state-owned off-taker guaranteed by Government. The COVID-19 pandemic and measures to curb the spread of the virus have triggered the scrutiny and application of force majeure (FM) clauses in these agreements. This article reviews the FM clauses and considers their relevance. The authors submit that FM clauses are a useful commercial tool for achieving energy justice by ensuring the continuity of the project, despite the dire effects of the pandemic. Proposals are made for practical considerations for a post-COVID-19 future which provides the continued pursuit of policy goals of promoting renewable energy sources and increasing access to clean energy, thus accelerating just energy transitions.

Modelling of Moisture Movement in Wood during Outdoor Storage

2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius
Keyword(s):  
Experimental Data ◽  
Finite Difference ◽  
Climatic Conditions ◽  
Two Dimensional ◽  
Moisture Movement ◽  
Finite Difference Technique ◽  
Long Term Storage ◽  
Space Formulation ◽  
Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

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