scholarly journals Establishment and management of suitable species in dairy pastures

1985 ◽  
Vol 3 ◽  
pp. 71-75
Author(s):  
E.R. Thom ◽  
N.A. Thomson ◽  
D.G. Clayton

For the success of a new dairy pasture, species and cultivars must be selected to counter the limitations to dairying of existing pasture. After successful establishment, the subsequent management of the pasture must ensure its full potential is expressed. Pasture establishment is a costly operation ($300-5OO/ha) with some element of risk, caused by unpredictable climatic conditions, irrespective of the level of technical expertise adopted.

Author(s):  
K. Vasylkovska ◽  
O. Andriienko ◽  
V. Malakhovska

The beginning of this century was marked by increased interest in food and energy security. The favorable geographical position and favorable natural and climatic conditions together with exclusive black earths make Ukraine one of the most promising producers of food in the world. However, there are a number of problems, both internal and external, that do not allow our country to fully reach its full potential. Along with the war in the east and political instability, there are a number of problems with the transformation of foreign trade and integration into the EU. The purpose of this article is to analyze the export potential of oilseeds and oilseeds in Ukraine, to determine the relationships between gross harvest, yield and export of oils, as well as to formulate recommendations for determining the efficiency of Ukrainian exports, its capacity and opportunities to increase due to transition to new cultivation technologies. cereals in changing climatic conditions. Due to the high demand for oilseeds and the level of profitability of these crops, there is a gradual and constant expansion of sown areas. Thus, in 2000 the sown area for oilseeds was 3.26 million hectares, separately sunflower – 2.94 million hectares, and in 2019 the area under oilseeds reached 8.89 million hectares, respectively, sunflower – 5.95 million hectares, that is, oilseeds for the period 2000-2019 increased the sown area by 2.73 times. Thus, the oil export rate gradually increased every year, starting from 0.554 million tons in 2000 and ending with 7.014 million tons of oil in 2019. The increase was not only in the gross collection in digital terms, respectively, a slight increase was observed in the share of exports in the gross collection. Therefore, the share of oil exports increased from 15.1 % in 2000 to 31.5 % in 2019. The average share of exports is 25.3 %. The study shows that Ukraine has the prerequisites to increase oil exports, which is facilitated by external factors such as WTO accession, integration processes and market orientation in the EU. At the same time, it is substantiated that considerable attention should be paid to organizational and technological factors of the internal environment of agricultural producers. Due to the change of climatic conditions there is a gradual change in the technology of growing crops. The change in cultivation technology involves the transition to new agricultural units that will provide moisture-saving agriculture. Without state support for agricultural production, it is impossible for farmers to make a qualitative and quantitative transition to higher yields.


2021 ◽  
Vol 13 (8) ◽  
pp. 4168
Author(s):  
Edgar Lorenzo-Sáez ◽  
Jose-Vicente Oliver-Villanueva ◽  
Victoria Lerma-Arce ◽  
Celia Yagüe-Hurtado ◽  
Lenin Guillermo Lemus-Zúñiga

Forest management is an untapped tool, yet to realize its full potential to fight against climate change. The capability of forests to act as carbon sinks makes them a key resource to reduce CO2 concentration in the atmosphere. However, carbon which has been fixed can be suddenly emitted again as a consequence of disturbances such as pests or wildfires. Mediterranean plant phenology, climatic conditions, and the accumulation of fuel biomass due to abandonment of traditional forest uses generate a scenario prone to large wildfires and consequently large greenhouse gases (GHG) emissions. The abandonment could be offset by considering the economic value of forest ecosystem services, principally carbon fixation. Nevertheless, currently existing forest carbon markets consider only anthropogenic fixation based on a business as usual scenario without disturbances that cannot be applied to Mediterranean forest reality. Thus, a methodology to monetize carbon fixed has been developed and applied. A range between 55.5 and 250 million € produced by the monetization of 16.5 million potential carbon credits has been obtained based on anthropogenic avoided emissions produced over a 10 year-period. Thereby, the potential for offsetting emissions of the pilot region was between 1.2% and 5.6% of total diffuse GHG emissions. Consequently, sustainable forest management represents an important opportunity to combat climate change, taking advantage of the margin of improvement that the Mediterranean forests currently have to avoid GHG emissions through forest fire prevention silviculture.


2019 ◽  
Vol 11 (6) ◽  
pp. 1654 ◽  
Author(s):  
Li Jiang ◽  
Xin Chen ◽  
Fei Lun ◽  
Zhihua Pan ◽  
Jiaheng Niu ◽  
...  

Exploiting the full potential of the realizable triple cropping system (RTCS) is one of the most effective methods for increasing land productivity, thus promoting food security. However, insufficient attention is paid to the spatial distribution of the RTCS in China. Here, a method is developed to assess the RTCS in China, considering terrain, climatic conditions, crop climatic-ecological suitability, and the spatial changes in the RTCS between 1951 and 2010. Results indicate that a decrease of 19 Mha was caused by topographic correction, while climate change increased the same area by 14 Mha. Based on crop climatic-ecological conditions, the suitability of the RTCS was indicated for 1068 counties. The boundary of the RTCS moved northward by 100–200 km in the Middle-Lower reaches of the Yangtze River, but southward by approximately 250 km in Yunnan Province. The area of the RTCS is 135 Mha distributed across 775 counties in Southern China. These findings are useful for guiding the policy of cultivated land use in Southern China. The approach can be adopted elsewhere to determine the RTCS for sustainable land use and increasing land productivity.


2002 ◽  
Vol 5 (3) ◽  
pp. 511-252
Author(s):  
J. G. Kotze

In attempting to achieve high performance levels within the enterprise, the manifestation of aligned commitment is a very desirable goal to aim for. It is instrumental in the realisation of the full potential of organisational members and in focusing their efforts and performance on the strategic vision of the enterprise. A model, which introduces, describes, and integrates the various processes, steps and actions required in the development of aligned commitment, is suggested. Guidelines, derived from research findings as well as experience gained in the actual implementation of the various constituent elements of the model, are supplied. These guidelines should assist in the successful establishment and maintenance of a value-driven, aligned commitment culture within any enterprise.


2013 ◽  
Vol 46 (3) ◽  
pp. 5-10
Author(s):  
C.I. Arsene ◽  
Andreea-Mihaela Bălău ◽  
E. Ulea

Abstract Due to the attack of the main pathogens agents in the wheat crop the wheat production is not exploited at the full potential. Powdery mildew, leaf spot and rust brown leaves are considered to be the most widespread and damaging diseases of wheat. In our country, the attack of these pathogens is present every year, with different intensities and it can cause production damages ranging from 3-4% to 20%. Due to this fact, the main attention of the farmers is to cultivate resistant wheat varieties to Blumeria graminis (DC.) Speer., Septoria tritici Rob. Desm. and Puccinia recondita Rob. et Desm. The main objective of this study was to evaluate the phytosanitary condition of 24 wheat varieties cultivated in 2011-2012 at the Ezăreni didactic Farm from University of Agricultural Sciences and Veterinary Medicine of Iaşi, Romania, localized in the central area of Moldavia. This study contains data regarding the spread and evolution of the main pathogens that were observed at the 24 wheat varieties studied. These varieties showed different reactions to different pathogens observed in the same environmental conditions thus some of them were resistant to Blumeria graminis (DC.) Speer. and Septoria tritici Rob. ex. Desm. attack, and some recorded a disease incidence of 18.75% at the Puccinia recondita Rob. et Desm attack.


Author(s):  
R.W. Horne

The technique of surrounding virus particles with a neutralised electron dense stain was described at the Fourth International Congress on Electron Microscopy, Berlin 1958 (see Home & Brenner, 1960, p. 625). For many years the negative staining technique in one form or another, has been applied to a wide range of biological materials. However, the full potential of the method has only recently been explored following the development and applications of optical diffraction and computer image analytical techniques to electron micrographs (cf. De Hosier & Klug, 1968; Markham 1968; Crowther et al., 1970; Home & Markham, 1973; Klug & Berger, 1974; Crowther & Klug, 1975). These image processing procedures have allowed a more precise and quantitative approach to be made concerning the interpretation, measurement and reconstruction of repeating features in certain biological systems.


Author(s):  
Benjamin M. Siegel

The potential advantages of high voltage electron microscopy for extending the limits of resolution and contrast in imaging low contrast objects, such as biomolecular specimens, is very great. The results of computations will be presented showing that at accelerating voltages of 500-1000 kV it should be possible to achieve spacial resolutions of 1 to 1.5 Å and using phase contrast imaging achieve adequate image contrast to observe single atoms of low atomic number.The practical problems associated with the design and utilization of the high voltage instrument are, optimistically, within the range of competence of the state of the art. However, there are some extremely important and critical areas to be systematically investigated before we have achieved this competence. The basic electron optics of the column required is well understood, but before the full potential of an instrument capable of resolutions of better than 1.5 Å are realized some very careful development work will be required. Of great importance for the actual achievement of high resolution with a high voltage electron microscope is the fundamental limitation set by the characteristics of the high voltage electron beam that can be obtained from the accelerator column.


Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
MD López ◽  
P Jara ◽  
S Fischer ◽  
R Wilckens ◽  
H Serri ◽  
...  

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