scholarly journals Agriculture in northern Namibia, Owambo and Kawango 1965—1970

1981 ◽  
Vol 53 (3) ◽  
pp. 168-209
Author(s):  
Sylvi Soini

The soils of Owambo and Kawango plateau in Northern Namibia between logitudes 14°—21°E and latitudes 17°23”—18°30” S are studied applying some methods of the Finnish agricultural soil map work. Soil samples of 120 sites, 76 from 3 depths are analysed, the results are connected with the descriptions of terraines and presented as averages and figures. This basic knowledge is connected with the facts of references, observations during the period, results of agricultural observation trials, questionaires and discussions with the farmers. According to these the descriptions and suggestions are made concerning the agriculture in the area. Water and plant nutrient supplies, soil concervation and the most possible different branches o fthe farming life in the area are taken into consideration and a list of these is presented.

ICAME 2011 ◽  
2012 ◽  
pp. 593-598
Author(s):  
Humberto Bustos Rodríguez ◽  
Dagoberto Oyola Lozano ◽  
Yebrayl Antonio Rojas Martínez ◽  
Marlene Rivera Pinilla ◽  
German Antonio Pérez Alcázar

2013 ◽  
Vol 96 (1) ◽  
pp. 186-189 ◽  
Author(s):  
Sumaira Khan ◽  
Tasneem Gul Kazi ◽  
Hassan Imran Afridi ◽  
Nida Fatima Kolachi ◽  
Naeem Ullah ◽  
...  

2016 ◽  
Vol 10 (3) ◽  
pp. 234
Author(s):  
Allayth Aldrabee ◽  
Hassan Juwhari ◽  
Jamal Al Jundi ◽  
Mashour Al Momani ◽  
Feras Afaneh

2012 ◽  
Vol 518-523 ◽  
pp. 2806-2811
Author(s):  
Wen Juan Jia ◽  
Ying Yan ◽  
Ying Su ◽  
Ming Da Liu

To identify the concentration and spatial distribution of cadmium (Cd) in agricultural soils, 207 soil samples were collected from Chaoyang and analyzed based on pollution index methods and GIS. The concentration of Cd in the soils of Chaoyang ranged from 0.030 to 0.687 mg/kg, with an average concentration of 0.246 mg/kg. The evaluated results of Cd in agricultural soils of Chaoyang shows that the pollution excess rate is 2.90%, the total agricultural soil environment of Cd was still clean, but some areas were accumulated by Cd. The differences between two evaluated methods indicate that evaluated criteria had a direct impact on the evaluation results, compared to integrated pollution index, the Geoaccumulation index method was more accurate and objective.


Author(s):  
А.Е. ОСИПЕНКО ◽  
Д.В. ГИЛЯЗОВА ◽  
К.А. БАШЕГУРОВ ◽  
Л.П. АБРАМОВА ◽  
И.А. ПАНИН

В статье описаны исследования почв первого участка питомника Уральского учебно-опытного лесхоза. Полевые работы осуществлялись в сентябре 2020 г. Исследования были начаты в связи с необходимостью составления проекта реконструкции питомника. В ходе почвенной съемки была заложена сеть из 22 точек исследования на площади 2,8 га. Схема размещения точек исследования приведена в статье. Всего было заложено 2 разреза, 8 полуразрезов, 12 прикопок. Описание морфологических признаков почвы заложен- ных разрезов также приводится в данной статье. Установлено, что средняя мощность пахотного горизон- та исследуемого участка составила 29,8 ± 1,4 см при минимальной мощности 18 см и максимуме 44 см. В точках исследования было отобрано 36 почвенных образцов в двух повторностях. Почва питомника была отнесена к типу дерново-подзолистые окультуренные и виду дерново-слабоподзолистые. По мощности пахотного слоя исследуемые почвы классифицированы как среднепахотные с признаками средне- и силь- ноокультуренных почв. В одном из заложенных разрезов было зафиксировано, что подзолистый горизонт полностью перепахан и даже в горизонте В видны следы трансформации. Во втором разрезе горизонт А2 вовлечён в пахотный слой не полностью, а подпахотный горизонт (А2В) имеет белесовато-бурую окраску. Исследования почв питомника Уральского учебно-опытного лесхоза будут продолжены в лаборатории ка- федры лесоводства УГЛТУ. На основании данных исследований планируется составить почвенную карту и оценить почвы питомника на предмет пригодности для выращивания декоративного и лесного поса- дочного материала. Работы по почвенной съемке на втором и третьем участках исследуемого питомника запланированы на лето 2021 г. Field work was carried out in September 2020. Research was begun in connection with the need to draw up a project for the reconstruction of the nursery. During the soil survey, a network of 22 study points was laid on an area of 2. 8 hectares. The diagram of study point displacement is given in the article. In total, 2 cuts, 8 half-cuts, 12 traps were laid. A description of the morphological signs of the soil of the laid sections is also given in this article. It was established that the average power of the arable horizon of the study site was 29.8 ± 1.4 cm, with a minimum power of 18 cm and a mac-simum of 44 cm. At the points of study, 36 soil samples in two repetitions were selected. The soil of the nursery was classifi ed as der-new-podzolic cultivated and sod-slightly podzolic. According to the capacity of the arable layer, the studied soils are classifi ed as medium-arable with signs of medium and highly cultured soils. In one of the laid cuts, it was recorded that the podzolic gori-umbrella was completely swamped, and even in horizon B there are signs of transfer. In the second section, the horizon А2 not involved in the arable layer by half, but the under-arable horizon (А2В) has a whitish-brown color. Soil studies of the nursery of the Ural Educational and Experimental Forestry will be continued in the laboratory of the Department of Forestry of USFEU. Based on these studies, it is planned to draw up a soil map and evaluate the nursery soils for suitability for growing ornamental and forest planting material. Soil survey work on the WTO and the third section of the studied nursery is planned for the summer of 2021.


2019 ◽  
Vol 108 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Şeref Turhan

Abstract Lignite coal is a major and an essential domestic energy source in Turkey. Many environmental problems and human health hazards may arise during lignite coal exploitation, combustion, and waste (fly and bottom ash and slag) disposal. In addition, lignite-burning power plants can be significant contributors to deposition of radiotoxic elements and/or toxic heavy metals on soil and water. The concentrations of thorium (Th) and uranium (U) in a 140 agricultural soil samples collected from the vicinity of a lignite-burning thermal power plant (LBTPP), located in Kangal district of Sivas province in the Central Anatolia region of Turkey, were determined using energy dispersive X-ray fluorescence spectroscopy. The concentrations of Th and U varied from 2.9 to 12.7 μg g−1 with an average value of 5.8 μg g−1 and 0.3–12.3 μg g−1 with an average value of 1.5 μg g−1, respectively. The radiotoxic elements pollution in agricultural soils was evaluated using pollution indices such as geo-accumulation index (Igeo), enrichment factors (EF), pollution index (PI) and Nemerow integrated pollution index (NIPI). The average value of Igeo, EF and PI estimated for Th and U were found as −1.8, 1.2 and 0.44 and −1.7, 1.7 and 0.58, respectively. The results indicated that the soils around Kangal LBTPP were practically unpolluted to low polluted with Th and U. The NIPI values varied from 0.3 to 4.0 with an average value of 0.6. The evaluation result of NIPI revealed that 86 % of total soil samples were non-polluted.


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