scholarly journals Opportunity for increasing the soil quality of non-arable and depleted soils in South Africa: A review

Author(s):  
Angelique Daniell ◽  
Danél van Tonder

Abstract The improvement of food security strategies on highly degraded soils has become a major challenge for South Africa, as the need to secure food sources for the growing population under harsher climatic conditions. South Africa is one of the many water scarce countries and is label 30th driest country in the world. The ability of a soil to serve as a growth medium for plants is directly influenced by the chemical, physical, and biological parameters but most importantly the fertility of the soil, which is a prominent part of soil quality. Numerous methods exist to enhance and maintain soil quality including the application of fertilizers and the other includes the application of geological materials to the soil. Basalt (commonly referred to as rock dust) application as a soil amendment has been the focus of numerous long-term studies on soil fertility. The results of long-term application of rock dust have indicated a reduction in continuously applying additional amendment, resulting in more sustainable farming operations. When considering South Africa's relative scarcity of available agricultural land and harsh climatic conditions against the increasing demand placed on food production by a growing population combined with water scarcity, it becomes evident that it is necessary to search for new innovative methods to improve soil quality, which is deemed non-arable and/or depleted. The potential for basalt in re-mineralisation and application on non-arable soil in South Africa hold enormous benefits for the economy.

Author(s):  
V.Ya. Akhmetov ◽  
R.N. Galikeev

According to the results of 2020, in the rating of the subjects of the Russian Federation for the production of gross agricultural output, the Republic of Bashkortostan came in 6th place and 2nd in the Volga Federal District. The long-term leadership of the republic in terms of the development of the agro-industrial complex is largely explained by the presence of large areas of agricultural land (more than 7.2 million hectares), sufficient labor resources and relatively favorable soil and climatic conditions for the development of many branches of agriculture. However, in the XXI century, without the introduction of agro-innovations and the development of high-tech agriculture, processing industry, an effective system for the sale of manufactured products, it is becoming increasingly problematic to ensure the long-term competitiveness of the agro-industrial complex of the region both at the All-Russian and global levels. Current trends in the development of agribusiness in the world and in our country clearly show the priority of using the latest achievements of scientific and technological progress and significant investments in new agricultural technologies at the regional level in order to ensure high quality products and compete with domestic and foreign companies. Within the framework of this study, the need to improve the interaction of agribusiness with the scientific and educational sphere and the formation of the regional innovation infrastructure of the agro-industrial complex in the Republic of Bashkortostan with the coordinating role of the Ufa Federal Research Center of the Russian Academy of Sciences and the Government of the Republic of Bashkortostan is actualized. The authors conducted a comprehensive analysis of the key problems in the creation of a regional agro-industrial scientific and production cluster in the Republic of Bashkortostan and outlined priorities in its development.


2019 ◽  
Vol 27 (6) ◽  
pp. 1381-1392 ◽  
Author(s):  
Frank Ashwood ◽  
Kevin Watts ◽  
Kirsty Park ◽  
Elisa Fuentes‐Montemayor ◽  
Sue Benham ◽  
...  

1990 ◽  
Vol 329 (1255) ◽  
pp. 391-401 ◽  

The developing countries would need to achieve an increase in their agricultural output by more than threefold during the next century to keep up with increasing demand, stemming from growth in population, incomes and urbanization. There is an urgent need for each country to quantify its long-term food and agricultural requirements and assess them against the possibilities of sustainable production from its own land resources. The extent to which physical resources of soil, climate, terrain and water can be utilized to produce food and agricultural products is limited. The ecological limits to production are set by soil and climatic conditions as well as by specific production inputs and management applied. Any 'mining ' of land resources beyond these ecological limits will, in the long run, only result in degradation and ever-decreasing productivity of land and of outputs, unless attention is paid to the management, conservation and enhancement of the natural resource base. The United Nations Food and Agricultural Organization agro-ecological zone (AEZ) methodology is concerned with the quantification of land resources and their potential agricultural productivity and population supporting capacity for development planning. The AEZ Kenya country methodology is described.


2016 ◽  
Vol 9 (36) ◽  
pp. 440-446
Author(s):  
Ivana Kravčáková Vozárová

Abstract The essential way of realization of the Common Agricultural Policy in EU is through the financial support. One of the basic ways of financial support are subsidies. The huge segment affecting the agricultural sector is necessary to define, describe or classify so that we can might it to best analyse and understand. The aim of this paper is to evaluate the development of agricultural subsidies granted per hectare of agricultural land in Slovakia in terms of territory. The difference between the individual regions was evaluated using one-way analysis of variance. This analysis confirmed the existence of statistically significant differences between the amounts of subsidies per hectare of agricultural land provided to agricultural entities in terms of individual regions. This fact shows that firms in regions with worse natural and climatic conditions achieved a higher amount of financial support than companies in regions where agricultural production has better conditions and a long-term tradition.


Author(s):  
Angus J. Beck ◽  
Ruth E. Alcock ◽  
Susan C. Wilson ◽  
Min-Jian Wang ◽  
Simon R. Wild ◽  
...  

2013 ◽  
Vol 43 (3) ◽  
pp. 179-195
Author(s):  
Hana Stŕedová ◽  
Tomáš Stŕeda ◽  
Jaroslav Rožnovský

Abstract Official price of farmland in the Czech Republic is based on land value in different soil and climatic conditions. The paper compares relevant climatic and agroclimatic characteristics used for land appraisement. Characteristics defined in climatic region of estimated pedological ecological unit system for two fifty years period 1901-1950 and 1961-2010 were evaluated. Area of interest includes 53 points distributed within nine broad areas of the Czech Republic. It is evident that the development of climate has an enormous impact on soil fertility. Difference of station average values of air temperature of both fifty years vary from −0.5 to 1.1 ◦ C (mean difference is 0.3 ◦ C) in the case of vegetation period. The shift of precipitation is not so evident as in the case of temperature. The long term change in precipitation distribution within a year is documented by a different shift of annual, vegetation period and non-vegetation period values. Moisture certainty in vegetation period decreases in all cases of broad areas (except one region). All 50year averages of investigated parameters had been changed in 1961-2010 compared to the mean of 1901-1950. This should be taken into account when fixing the official price. Climatic region parameters should be replaced by a more complex “agroclimatological characteristic”, which take into account also the basic pedological and plant characteristics, for example the available water holding capacity.


2017 ◽  
Vol 68 (9) ◽  
pp. 1626 ◽  
Author(s):  
Annah Mabidi ◽  
Matthew S. Bird ◽  
Renzo Perissinotto

The proposed drilling for shale gas resources in the Eastern Cape Karoo region of South Africa has triggered much debate over the potential effects of hydraulic fracturing on water resources. Herein we present results on some limnological aspects of surface waterbodies in this water-scarce region before shale gas exploration. Thirty-three waterbodies (nine dams, 13 depression wetlands and 11 rivers) were sampled in November 2014 and April 2015. Principal component analysis revealed that depression wetlands and rivers had distinct physicochemical signatures, whereas dams were highly variable in their physicochemical attributes and exhibited characteristics similar to those of either rivers or depression wetlands. Non-parametric multivariate regressions and permutational multivariate analysis of variance (MANOVA) indicated that landscape variables such as underlying geology, altitude and land use poorly explained the physicochemical characteristics of the sampled waterbodies. Waterbody type was the only factor that explained a significant amount of the variation in physicochemistry during both sampling events. These data need to be supplemented by water quality information from additional sites and over longer time periods, as well as supporting data relating to other aspects, such as algae and invertebrates, before they can be used as a baseline for the long-term monitoring of freshwater ecosystems in the region.


2020 ◽  
Vol 11 (2) ◽  
pp. 77
Author(s):  
Achmad Rachman

<p><strong>Abstrak.</strong> Pertanian konservasi adalah salah satu alternatif model pada praktek pertanian di lahan kering yang dalam jangka panjang dapat meningkatkan produktivitas tanaman, efisiensi usahatani, dan kualitas lingkungan melalui perbaikan kualitas tanah. Tulisan ini membahas prospek penerapan pertanian konservasi untuk meningkatkan kualitas tanah dan produktivitas lahan kering. Model pertanian konservasi lebih menekankan pada perbaikan kandungan bahan organik tanah melalui kombinasi 3 pendekatan yaitu olah tanah minimum, pemulsaan, dan pengaturan pola tanam. Introduksi model pertanian konservasi di negara-negara berkembang seperti Indonesia, yang umumnya lahan pertaniannya berskala sempit (&lt;1 ha) dihadapkan pada masalah perkembangan gulma dan penurunan produktivitas pada fase awal implementasi, dan lahan yang tidak bersih sehingga berpotensi memicu munculnya hama dan penyakit tertentu. Namun demikian, model pertanian konservasi ini berpotensi untuk mengubah lahan kering terdegradasi atau tidak produktif menjadi lahan pertanian produktif dengan efisiensi usahatani yang tinggi. Dengan manfaat jangka panjang tersebut, maka implementasi pertanian konservasi di lahan kering, yang potensinya mencapai 29,4 juta ha, akan meningkatkan secara signifikan kontribusi lahan kering terhadap upaya mempertahankan swasembada pangan nasional dan meningkatkan kesejahteraan petani lahan kering. Diperlukan proses dan modifikasi untuk mengadaptasikan teknologi ini yang disesuaikan dengan karakteristik agroekosistem, konidisi sosial, dan ekonomi lokal setempat, sehingga berbagai kendala adopsi dapat diminimalisir dan manfaat dapat dioptimalkan baik jangka pendek maupun jangka panjang. Selain itu, diperlukan dukungan pemerintah dalam bentuk pelatihan, advokasi, dan bantuan input usahatani untuk meminimalisir resiko kerugian petani terutama pada tahap awal implementasi teknologi.</p><p><em><strong>Abstract.</strong></em> Conservation agriculture is an alternative model to agricultural practices in dryland which in the long term provides a number of benefits including an increase in crop productivity, farm input efficiency and environmental quality through the improvement of soil quality. This paper discusses the prospect for implementing conservation agricultural to improve soil quality and productivity of dryland. The conservation agriculture model emphasizes the improvement of soil organic matter content through a combination of 3 approaches, namely minimum tillage, mulching, and cropping pattern. Introduction of conservation agriculture into developing countries like Indonesia, which are generally small-scale farming (&lt;1 ha), will face a number of obstacles caused by short-term and immediate shortcomings of the technology. These shortcomings include weed development and productivity decline in the early phase of implementation, and the potential to trigger the emergence of certain pests and diseases due to unclean land. However, the practice has the potential to transform degraded or unproductive drylands into more efficient and productive agricultural land. With those long-term benefits of conservation agriculture, its implementation to 29.4 million ha of dryland of Indonesia will boost significantly the contribution of dryland agriculture in sustaining national food self sufficiency and improving the welfare of dryland farmers. Processes and modifications are needed to adapt this practice to suit local agroecosystem, social and local economic characteristics so that various adoption constraints can be minimized and short-term and long-term benefits can be optimized. In addition, government supports are needed in the form of training, advocacy and farm inputs subsidies to minimize the risk of loss of farmers especially in the early stages of technology implementation.</p>


2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius

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.


Author(s):  
Laima TAPARAUSKIENĖ ◽  
Veronika LUKŠEVIČIŪTĖ

This study provides the analysis of drought conditions of vegetation period in 1982-2014 year in two Lithuanian regions: Kaunas and Telšiai. To identify drought conditions the Standardized Precipitation Index (SPI) was applied. SPI was calculated using the long-term precipitation record of 1982–2014 with in-situ meteorological data. Calculation step of SPI was taken 1 month considering only vegetation period (May, June, July, August, September). The purpose of investigation was to evaluate the humidity/aridity of vegetation period and find out the probability of droughts occurrence under Lithuanian climatic conditions. It was found out that according SPI results droughts occurred in 14.5 % of all months in Kaunas region and in 15.8 % in Telšiai region. Wet periods in Kaunas region occurred in 15.8 %, and in Telšiai region occurrence of wet periods was – 18.8 % from all evaluated months. According SPI evaluation near normal were 69.7 % of total months during period of investigation in Kaunas and respectively – 65.5 % in Telšiai. The probability for extremely dry period under Lithuania climatic conditions are pretty low – 3.0 % in middle Lithuania and 2.4 % in western part of Lithuania.


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