AGRIS - 

2017

Hyun, B.K., National Institute of Agricultural Science, Wanju, Republic of Korea | Sonn, Y.K., National Institute of Agricultural Science, Wanju, Republic of Korea | Kim, K.T., National Institute of Agricultural Science, Wanju, Republic of Korea | Cho, H.J., National Institute of Agricultural Science, Wanju, Republic of Korea | Jung, S.J., National Institute of Agricultural Science, Wanju, Republic of Korea | Choi, J.W., National Institute of Agricultural Science, Wanju, Republic of Korea

Recently, agricultural lands have decreased sharply, which was caused by huge housing site, urbanization, land consolidation, and road construction etc. In particular, Yangju city near Seoul city has the most severe land use change in Korea. Therefore, we analyzed changes of land use, soil properties, and soil information in order to provide the basic soil information and soil management practices in this city. The area of crop cultivated land in Korea (2015) reduced by 12,090 ha compared to ones from the previous year (2014). The paddy field decreased by 25,421 ha but, upland field increased by 13,331 ha. One of the reasons for the reduction of the paddy field was converting paddy field to upland (20,916 ha) greater than others (3,056) greater than building (2,571) greater than public facilities (847) greater than idle land (217). But, reasons for increase of upland field were switching paddy to upland (20,916 ha) greater than land developed (634). The main reason of converting paddy field to upland was changing from rice to more profitable speciality crops or pulses. The cropland area (paddy fields, upland, orchard) of Yangju city reduced by 1,412 ha (2015/2014). The ratio of cropland area in each city reduced by 22.9% dramatically compared 2015 to 1999. The paddy fields located in alluvial plains in Yangju city were changed into upland or green house. The drainage classes of soil have been deteriorated because the flows of water were intercepted by road construction and other disturbance to water flows. In particular, paddy fields have been changed to not only upland, orchard, greenhouse cultivation but also to fallow and soil dressing on paddy in Yangju city. To analyze result of soil survey of Yangju city, 858 soil codes (soil phases) were used and the area was 105.17ha. The number of soil series increased from 60 to 65, and that of soil phase increased from 105 to 124. The largest increased area was Noegog soil series. 125.7ha of Neogog soil series was incorporated from the existing Sachon, Yecheon and Eungog soil series. The soil suitability class of paddy field in Ogjung huge housing site of Yangju city was the 4th grade for 32.6% of the area. The soil suitability classes of upland were 2nd and 3rd grade for 72.4% of the area. Farm land with high quality should be conserved by related law.

Show more [+]

Less [-]

Korea Agricultural Science Digital Library - Republic of Korea

2017

Chekmarev, P.A., Ministry of Agriculture, Moscow (Russian Federation) | Sidorov, A.V. | Moiseev, A.A.

Analyzed the results of a full agrochemical survey of arable land of the Republic of Mordovia during the period of 1964-2015. During this whole period the arable lands of the republic are characterized as medium humic according to the content of organic matter. According to the results of the last (8-th) cycle of the agrochemical survey (2002-2015) the average weighted value of this indicator is 5.8 %. The content of mobile forms of phosphorus increased from 55 mg/kg of soil (the 1-st cycle) to 142 mg/kg of soil (the 8-th cycle), or by 258.2 %. The average weighted content of exchange potassium in the arable lands of Mordovia changed less significantly; the growth was 53.8 % (the variation over the cycles of the survey was from 104 to 160 mg/kg of soil). Today the value of this indicator corresponds to the higher level. According to the data of the 8-th cycle of the agrochemical survey the total area of acid arable soils in the region is 76.4 % (754.200 ha); 293.200 ha of them require top-priority liming. The fraction of arable lands with low content of humus is 21.4 % (210.500 ha), with low content of mobile forms of phosphorus and potassium – 9.3 % (91.800 ha) and 8.6 % (84.900 ha), respectively. The arable lands of the republic are mainly characterized by medium and high provision with mobile compounds of boron, copper, and zinc, by medium provision – of manganese, cobalt, and sulfur. They are not polluted by strontium-90 and caesium-137. The average annual balance of the main nutrients in the agriculture of the republic was negative during the period from 1970 to 1974; from 1975 to 1992 it was positive and achieved the maximum values in 1985-1989 (+ 68 kg/ha). After 1993 the balance of nitrogen, phosphorus, potassium, calcium and manganese in the agriculture of the republic was negative. A high probability of reducing the fertility of arable soils is predicted. It is recommended to use broader mineral and organic fertilizers, to do liming and phosphatizing of acid soils, to introduce the farming biologization techniques. | Проанализированы результаты сплошного агрохимического обследования пахотных почв Республики Мордовия за период с 1964 по 2015 гг. В течение всего указанного периода по содержанию органического вещества пахотные почвы республики характеризовались как среднегумусированные. По данным последнего (8-го) тура агрохимического обследования (2002-2015) средневзвешенная величина этого показателя составляет 5,8 %. Содержание подвижных форм фосфора повысилось с 55 (первый цикл) до 142 мг/ кг почвы (8-й цикл), или на 258,2 %. Средневзвешенное содержание подвижного калия в пахотных почвах Мордовии изменялось менее значительно, прирост составил 53,8 % (варьирование по циклам обследований от 104 до 160 мг/ кг почвы). На сегодняшний день величина этого показателя соответствует повышенному уровню. По данным 8-го цикла агрохимического обследования суммарная площадь кислых почв пашни в регионе составляет 76,4 % (754,2 тыс. га), из них 293,2 тыс. га нуждаются в первоочередном известковании. На долю пашни с низким содержанием гумуса в республике приходится 21,4 % (210,5 тыс. га), с низким содержанием подвижных форм фосфора и калия – 9,3 % (91,8 тыс. га) и 8,6 % (84,9 тыс. га) соответственно. Пахотные почвы республики преимущественно характеризуются средней и высокой обеспеченностью подвижными соединениями бора, меди и цинка, средней – марганца, кобальта и серы. Стронцием-90 и цезием-137 они не загрязнены. Среднегодовой баланс основных элементов питания в земледелии республики в период с 1970 по 1974 гг. был отрицательным, с 1975 по 1992 гг. – складывался положительно и достиг максимальных значений в 1985-1989 гг. (+ 68 кг/га). После 1993 г. баланс азота, фосфора, калия, кальция и магния в земледелии республики был отрицательным. Прогнозируется высокая вероятность снижения плодородия пахотных почв. Рекомендуется шире применять минеральные и органические удобрения, проводить известкование и фосфоритование кислых почв, внедрять приемы биологизации земледелия.

Show more [+]

Less [-]

Central Scientific Agricultural Library - Russian Federation

2017

Kalka, I., University of Latvia, Riga (Latvia). Faculty of Geography and Earth Sciences | Kasparinskis, R., University of Latvia, Riga (Latvia). Faculty of Geography and Earth Sciences

Soil samples in 349  sampling plots were obtained within the LUCAS project in 2009; from these, 205 soil samples were collected in agricultural lands (grasslands, arable lands, grasslands overgrown by trees and shrubs), and 133 soil samples were obtained in forests (deciduous, coniferous and mixed forests), as well as 7 soil samples–in scrublands. The results of this study show that relatively low content of organic carbon is detected in soils with relatively high amount of sand particles (sand, sandy loam) in comparison to soil textural classes (silt, loam, clay), characterised by relatively high amount of clay and silt particles. The results show that differences in organic carbon content in mineral topsoil (0–20 cm) is mainly determined by the soil textural classes, as well as the land use (arable land, grasslands, grasslands with trees and shrubs, coniferous forests, deciduous forests, mixed forests). Study results show that anthropogenic activities have a crucial role.

Show more [+]

Less [-]

Fundamental Library of Latvia University of Life Sciences and Technologies - Latvia

2016

r vaquero morris

R Vaquero Morris, 'Reconocimiento general del área Yorito-Sulaco, departamento de Yoro, Honduras, C.A', Centro Internacional de Agricultura Tropical (CIAT), Proyecto CIAT-Laderas, 2016

Show more [+]

Less [-]

GARDIAN - United States of America

2016

peter g. jones

Peter G. Jones, 'The Bolivian savannas : some preliminary information on their suitability for rice production', Centro Internacional de Agricultura Tropical (CIAT), 2016

Show more [+]

Less [-]

GARDIAN - United States of America

2016

Кlеbаnоvichi, N., Belarusian State Univ., Minsk

The prospect of GIS technology to create and to use of soil maps is stated. Conducted a GIS analysis of soil cover the territory of Cherven District showed the predominance of retisols of large areas isomorphic and asymmetrical shapes, three times less than the average area for podzols with isomorphic form. The most complicated form of areas marked for alluvial soil types. Their coefficients of irregularity boundaries typically less than 0.2, and are fluvial forms of areas. To improve the quality of generalized maps (district, regional) need to use objective methods of automated generalization maps in the digital environment.

Show more [+]

Less [-]

Fundamental Library of Latvia University of Life Sciences and Technologies - Latvia

2016

Alekseev,V.N. | Klebanovich,N.V. | Prokopovich,S.N. | Eres& | #039 | ko,M.A.

In present period, the accounting of soils and lands should be carried out within the limits of modern information technologies, which allows obtaining much more relevant information about the state of the land fund and its most important component - soil resources. The presence of a soil-inventory resource will allow to carry out permanent monitoring of the state of soils in order to identify the evolution of the state of 14 agricultural lands, assess the occurring changes, will help develop measures to improve soil fertility and protection of the land against degradation. Generalization of large-scale soil research data shows that the thesis of the predominance of eutricretisols (sod-podzolic soils) is inaccurate in the territory of agricultural and forest land in Grodno district. The amount of gleyicretisols (39% of the area) and of eutricretisols (40%) in the territory of agricultural and forest land area is approximately the same. It is stated a higher proportion of type cambisols, gleyc (stagnic) retisols, upland peat-bog soil on forest land in comparison with the agricultural land and lower – rendsicleptosols, gleyicfluvisols, anthrosols. | В современную эпоху учет почв и земель должен осуществляться в рамках современных информационных технологий, что позволяет получать значительно более актуальную информацию о состоянии земельного фонда и наиболее важной ее составляющей – почвенных ресурсов. Наличие почвенно-инвентаризационного ресурса позволит проводить перманентный мониторинг состояния почв с целью выявления эволюции состояния 14 сельскохозяйственных земель, оценки происходящих изменений, поможет разработке мероприятий по повышению плодородия почв и защите земель от деградации. Обобщение материалов крупномасштабных обследований почв показывает, что тезис о преобладании дерново-подзолистых почв в Гродненской области неточен. Отмечается примерный паритет дерново-подзолистых заболоченных почв (39% площади) и дерново-подзолистых (40%) на территории сельскохозяйственных и лесных земель области. Констатируется более высокая доля типов бурых лесных, дерново-подзолистых заболоченных, торфяно-болотных верховых почв на лесных землях по сравнению с сельскохозяйственными и более низкая – дерново-карбонатных, дерново-подзолистых, аллювиальных дерновых заболоченных, антропогенно-преобразованных.

Show more [+]

Less [-]

National Academy of Sciences of Belarus - Belarus

2015

Muizniece, E., University of Latvia, Riga

This paper describes the application of geomorphological approach for environmental management and conservation of landforms. Specifically, we discuss the contribution of geomorphological field survey and adapted matrix methodology (in combination with understanding of geology) to identification, study and evaluation of those abiotic nature elements which represent geological and geomorphological heritage. We describe a case study carried out in that part of the protected landscape area “Augsdaugava” which encompasses the Upper Daugava spillway valley. The study programme reported in this paper was realized to perform inventory of landforms and geological features for recognition of objects of particular interest in terms of including them in the list of protected nature monuments. After the field reconnaissance and survey of such objects in situ, the assessment based on several criteria like scientific, aesthetic and paleogeographic value, type, rareness, integrity and representativeness was performed. Obtained data is sufficient to make a well-founded selection of the abiotic nature elements and components of geodiversity, including geological and geomorphological features, e.g. particular landforms as protected nature objects, and to substantiate the need for their conservation. Hence, the output of performed study can be used for enhancing environmental management and conservation of nature diversity and values in this region.

Show more [+]

Less [-]

Fundamental Library of Latvia University of Life Sciences and Technologies - Latvia

2015

Shemnyakov, D.V. | Naliukhin, A.N., Vologda State Milk Industry Academy

Изучали внутрипольную вариабельность основных агрохимических показателей дерново-подзолистой легкосуглинистой почвы и их связь с урожайностью ярового ячменя сорта Сонет. Исследования проводились в Вологодской области на агрополигоне площадью 28,8 га. Для создания электронной карты использовали планшетный компьютер Algiz-7 со встроенным GPS приемником и программным обеспечением FiledRover II. Для взятия почвенных образцов на почвенный контур была наложена сетка с целью выделения границ элементарных участков площадью 1 га. Координаты взятия почвенных образцов вводили в бортовой компьютер. С элементарного участка отбирали 20 точечных проб массой 350-400 г. Картограммы распределения урожайности ячменя и агрохимических показателей почвы по участкам агрополигона сформированы в ГИС "Деметра". По результатам исследований отмечено сильное варьирование по элементарным участкам поля содержания гумуса (от 1,9 до 5,1%), подвижного фосфора (203-529 мг/кг) и среднее – кислотности почвы (от 4,6 до 6,7 ед. рН). Содержание подвижного калия колеблется от среднего (95 мг/кг) до очень высокого (289 мг/кг). Выявлена положительная корреляция (r=0,55) между содержанием калия в почве и урожайностью ячменя. Также отмечается средняя по тесноте (r=0,51) линейная взаимосвязь между суммой поглощенных оснований и урожайностью культуры. На основании выявленных закономерностей взаимосвязи агрохимических показателей почвы с урожайностью ячменя показано, что наиболее целесообразно использование азотных и калийных удобрений с учетом почвенной неоднородности. Дозы азотных удобрений целесообразно дифференцировать по данным растительной диагностики в разные фазы вегетации. Внесение фосфорных удобрений вследствие высокого и очень высокого содержания подвижного фосфора в почве агрополигона нецелесообразно. | Basic agrochemical parameters variability of soddy-podzolic light loamy soil within the field and impact of these parameters on Sonet spring barley variety yielding capacity were studied. Investigations have been carried out on the experimental field with total area of 28.8 ha in Vologda Region. For making electronic map Algiz-7 tablet computer with built-in GPS receiver and Filed Rover II software has been used. For taking soil samples grid has been put on soil contour to identify elementary plots boundaries with area of 1 ha. The coordinates of taking soil samples have been entered into the onboard computer. 20 spot samples weighing 350-400 g have been taken from the elementary plot. The cartograms of distribution of barley yielding capacity and agrochemical soil parameters between the plots of the experimental field have been formed in GIS "Demetra". According to the results of the research a considerable variation in humus content (from 1.9 to 5.1%), mobile phosphorus (203-529 mg/kg) and an average variation in soil acidity (from 4.6 to 6.7 pH) have been noted. The mobile potassium content varies from average (95mg/kg) to very high (289mg/kg). A positive correlation (r=0.51) linear relationship between the potassium content in the soil and the yielding capacity of barley has been revealed. An average in closeness (r=0.51) linear relationship between the sum of the absorbed bases and the yielding capacity of the crop has been also noted. According to the identified correlations between the agrochemical soil parameters and the yielding capacity of barley it has been shown that using nitrogen and potassium fertilizers taking soil heterogeneity into consideration is the most reasonable. It is advisable to differentiate the doses of nitrogen fertilizers according to plant diagnosis data in different phases of growth. Applying phosphorus fertilizers is not advisable due to high and very high mobile phosphorus content in the soil of the experimental field.

Show more [+]

Less [-]

Central Scientific Agricultural Library - Russian Federation

2015

Demirekin, H., Süleyman Demirel Univ., Faculty of Agriculture, Isparta (Turkey). Div. of Soil Sciences and Plant Nutrition | Erdal, İ., Süleyman Demirel Univ., Faculty of Agriculture, Isparta (Turkey). Div. of Soil Sciences and Plant Nutrition

Araştırmada, Hakkâri-Çukurca yöresi tarım topraklarının verimlilik durumlarının toprak analizleriyle belirlenmesi amaçlanmıştır. Bu amaçla yöreyi temsilen alınan 25 toprak örneğinde pH, EC, CaCO3, bünye, organik madde ve bitkiye yarayışlı besin elementi analizleri yapılmıştır. Elde edilen bulgulara göre, araştırma alanı topraklarının %32'sinin killi, %48'inin killi tınlı, %12'si tınlı %8'i kumlu-killi- tınlı bünyeye sahip olduğu, toprakların tamamının hafif alkali reaksiyonlu,%56'sının orta kireçli, %36'sının fazla kireçli, %8'inin çok fazla kireçli olduğu belirlenmiştir. Toprakların %36'sı tuzsuz, %64'ü az tuzludur. Toprak organik maddesi bakımından %8'i çok az, %40'ı az, %44'ü orta, %8'i iyi sınıfındadır. Toprakların %16'sının P yönünden az, %56'sının yeterli ve %28'inin fazla düzeyde olduğu; %52'sinin K içeriklerinin yeterli, %4'ünün az, %36'sının fazla, %8'inin çok fazla düzeyde olduğu belirlenmiştir. Örneklerin %48'inde alınabilir Ca az olup %52'sinde yeterli, %4'ünde Mg içeriği çok az, %96'sında ise az düzeyde bulunduğu tespit edilmiştir. Mikro element konsantrasyonları açısından bir değerlendirme yapıldığında toprakların %84'ünün Fe, % 52' sinin Mn, %44' ünün Zn % 4'ünün de Cu bakımından fakir olduğu belirlenmiştir. | The aim of this study was to determine the fertility status of Hakkari-Cukurca soils by means of soil analysis. In this survey study, 25 soil samples representing the region were taken. On the soils, pH, EC, CaCO3, texture and organic matter and available nutrient analyses were done. According to results, it was seen that 32 % of the soil is clayey, 48 % of the soil is clayey-loamy, 12 % of the soil is loamy and 8 % of the soil is sandy-clayey-loamy. All of the soils are slightly alkaline and 56 % of the soil have moderate, 36 of soil have high and 8 %of the soil have moderate to high lime content. While there is no salt at 36 percent of the soil, 64 % of the soil contains little salt. Eight percent of the soil contains very little organic matter, 40 % of the soil contains little, 44% of the soil contains moderate and 8% of the soil contains sufficient organic matter. 28% of the soil is sufficient, 64% of the soil is high and 8% of the soil is very high in terms of nitrogen. If an evaluation was made in terms of available nutrient concentrations, it was seen that 16% of the soil had lower, 56% of the soil had sufficient and 28% of the soil had high P. 52% of the soil contained sufficient, 4% of the soil contained lower amount, 36% of the soil contained high and 8% of the soil contained very high amount K. For available Ca, 48% of the samples is low, 52% of is enough. While 4% of the soils contained very little Mg, 96% of the soil contained little amount of Mg. According to micronutrient results, it was seen that 84% of the soil is poor for Fe, 52% of the soils is poor for Mn, 44% of the soil is poor for Zn and 4% of the soil is poor in terms of Cu.

Show more [+]

Less [-]

Ministry of Agriculture and Forestry, Department of Training and Publication, National AGRIS Center (Turkey) - Turkey