The Microcomputer: A Valuable Tool for Field Soil Survey

2015 ◽  
pp. 49-55
Author(s):  
F. R. Kukachka
Keyword(s):  
Soil Survey ◽  
Field Soil

Extracting topographic characteristics of landforms typical of Canadian agricultural landscapes for agri-environmental modeling. I. Methodology

2011 ◽  
Vol 91 (2) ◽  
pp. 251-266 ◽  
Author(s):  
Sheng Li ◽  
David Lobb ◽  
Brian McConkey ◽  
R. A. MacMillan ◽  
Alan Moulin ◽  
...  
Keyword(s):  
Agricultural Land ◽  
Quantitative Measure ◽  
Companion Paper ◽  
Environmental Modeling ◽  
Agricultural Landscapes ◽  
Soil Survey ◽  
Field Soil ◽  
Environmental Models ◽  
Topographic Information ◽  
Topographic Characteristics

Li, S., Lobb, D. A., McConkey, B. G., MacMillan, R. A., Moulin, A. and Fraser, W. R. 2011. Extracting topographic characteristics of landforms typical of Canadian agricultural landscapes for agri-environmental modeling. I. Methodology. Can. J. Soil Sci. 91: 251–266. Soil and topographic information are key inputs for many agri-environmental models and there are linkages between soil and topography at the field scale. A major source of soil data is soil databases established based on field soil survey. Although both soil and topographic information are recorded in field soil surveys, the nominal nature of the topographic data has limited their use in agri-environmental models. In this study, we developed a methodology to extract various topographic derivatives and to classify the landscape into landform elements with distinctive topographic characteristics based on detailed analyses of fine resolution digital elevation models. Data obtained from these analyses were used to calculate a representative two-dimensional hillslope of five segments, each with a defined length and slope gradient. A set of modal hillslopes was developed to describe topographic variability. Additional topographic parameters, ratios and indices were calculated to reflect different aspects of topographic characteristics and also to build connections between different agri-environmental models. In particular, a topographic complexity index was developed as a quantitative measure of the degrees of divergence and convergence. This paper describes the methodology using one site as an example. Application of this methodology to other landforms in agricultural land of Canada is reported in a companion paper.

scholarly journals The using pilotless vehicle pictures for urban ecosystem soil-vegetable cover ecological condition estimating

2014 ◽  
pp. 77-89
Author(s):  
I. N. Gorokhova ◽  
T. I. Borisochkina ◽  
E. A. Shishkonakova
Keyword(s):  
Contaminated Soils ◽  
Urban Ecosystem ◽  
Ecological Condition ◽  
Soil Samples ◽  
Soil Survey ◽  
Geochemical Analysis ◽  
Field Soil ◽  
Gis Technologies ◽  
Soil Status ◽  
New Moscow

A soil-environmental analysis of the urbanized ecosystem represented by the key site “Kurilovo” in New Moscow has been made using the images obtained by pilotless air-craft and modern GIS-technologies. In the course of this study the decoding of remote materials and field soil survey were conducted to describe the vegetation and soils; the geochemical analysis of soil samples was made with the aim at compiling an electronic ecological map of the area under study. These studies allowed us to specify the boundaries of the key area, to evaluate the vegetation and soil status in forests, residential and industrial areas as well as to identify the areas covered by contaminated soils.

scholarly journals Long-term changes in the area of saline soils recognized by LANDSAT images in Shauldersk irrigated massive

2014 ◽  
pp. 49-65 ◽  
Author(s):  
I. Yu. Savin ◽  
A. . Otarov ◽  
A. V. Zhogolev ◽  
M. A. Ibraeva ◽  
S. . Duseikov
Keyword(s):  
Satellite Imagery ◽  
Computer Analysis ◽  
Soil Survey ◽  
Saline Soils ◽  
Field Soil ◽  
The South ◽  
Landsat Images ◽  
Long Term Changes

Possibilities to use the archive images obtained by Landsat TM5 in different years have been comprehensively analyzed with the aim at recognizing the soils with different salinity degree. Special approaches were proposed to study the dynamics of saline soils by using the satellite imagery. Based upon a computer analysis of the information transmitted by Landsat in 1987-1988 and 2009-2010 as well as the data of field soil survey, it seemed reasonable to identify changes in the area of such soils in Shauldersk irrigated massive (the South-Kazakhstan region, Republic of Kazakhstan). It was concluded that the share of saline soils revealed an increase at the studied territory within the period from 1987 to 2010.

New Technologies in Field Soil Survey

2011 ◽  
Author(s):  
David C. Weindorf ◽  
Somsubhra Chakraborty ◽  
Yuanda Zhu ◽  
John Galbraith ◽  
Yufeng Ge
Keyword(s):  
New Technologies ◽  
Soil Survey ◽  
Field Soil

The use of Soil survey

1907 ◽  
Vol 64 (1657supp) ◽  
pp. 221-222
Author(s):  
J. A. Bonsteel
Keyword(s):  
Soil Survey

THE CLASSIFICATION OF LAND ACCORDING TO THE DEGREE OF RABBIT INFESTATION IN CENTRAL OTAGO

1987 ◽  
pp. 65-70
Author(s):  
I.G.C. Kerr ◽  
J.M. Williams ◽  
W.D. Ross ◽  
J.M. Pollard
Keyword(s):  
Carrying Capacity ◽  
Mediterranean Climate ◽  
Natural Habitat ◽  
Public Funding ◽  
Soil Survey ◽  
European Rabbit ◽  
Cultural Modification ◽  
Classification Information ◽  
Semi Arid

The European rabbit (Oryctolagus cuniculus) introduced into New Zealand in the 183Os, has consistently flourished in Central Otago, the upper Waitaki, and inland Marlborough, all areas of mediterranean climate. It has proved difficult to manage in these habitats. The 'rabbit problem' is largely confined to 105,000 ha of low producing land mostly in semi arid areas of Central Otago. No field scale modifications of the natural habitat have been successful in limiting rabbit numbers. The costs of control exceed the revenue from the land and continued public funding for control operations appears necessary. A system for classifying land according to the degree of rabbit proneness is described. Soil survey and land classification information for Central Otago is related to the distribution and density of rabbits. This intormation can be used as a basis for defining rabbit carrying capacity and consequent land use constraints and management needs. It is concluded that the natural rabbit carrying capacity of land can be defined by reference to soil survey information and cultural modification to the natural vegetation. Classification of land according to rabbit proneness is proposed as a means of identifying the need for, and allocation of, public funding tor rabbit management. Keywords: Rabbit habitat, rabbit proneness, use of rabbit prone land.

Comparison of pedotransfer functions to estimate the van Genuchten parameters from soil survey information

2013 ◽  
Vol 62 (1) ◽  
pp. 5-22 ◽  
Author(s):  
Brigitta Tóth ◽  
András Makó ◽  
Gergely Tóth ◽  
Csilla Farkas ◽  
Kálmán Rajkai
Keyword(s):  
Soil Survey ◽  
Pedotransfer Functions

Kutatásunk célja a víztartóképesség-függvény (VKF) paramétereit az átnézetes térképeink adattartalmával becslő módszerek megbízhatóságának összehasonlítása és továbbfejlesztésük vizsgálata a Magyarországi Részletes Talajfizikai és Hidrológiai Adatbázison (MARTHA).Az irodalomban fellehető módszerek közül VKF-becslő módszert hazai átnézetes talajtérképi információkra eddig egyedül a Kreybig térképekre alkalmazták (Bakacsi et al., 2012). Ők a talaj higroszkópossága (hy) alapján becsülték adott talaj FAO (1995) fizikai féleség kategóriába tartozását. Wösten és munkatársai (1999) és Nemes (2003) pedotranszfer-függvényei alapján rendelték továbbá a talajhoz a fizikai féleség kategóriára meghatározott víztartóképesség-függvény (VKF) van Genuchten paramétereit (HYPRES_hy és HUNSODA_hy módszerek).Bakacsi és munkatársai (2012) eljárását követve, a MARTHA adatbázison vizsgáltuk a hy és az ötkategóriás FAO fizikai féleség kapcsolatát. A fizikai féleség becslését az Arany-féle kötöttség (KA) alapján is kidolgoztuk.Wösten és munkatársai (1999) módszerével meghatároztuk a MARTHA adatbázis talajainak a FAO fizikai féleség kategóriákra jellemző víztartóképességfüggvényeinek van Genuchten paramétereit. A meghatározást a pF6,2 értéken felül a legalább három, majd a legalább öt mért víztartóképesség-értékű talajmintákon végeztük.Megállapítottuk, hogy a KA alapján hatékonyabb a talajminták FAO fizikai féleség kategóriába sorolása, mint a hy alapján.Abban az esetben, amikor nem áll rendelkezésre mechanikai összetétel és a fizikai féleség kategóriába történő besorolást a talaj higroszkópossága alapján végezzük, akkor a VKF-becslés megbízhatósága szignifikánsan rosszabb. Hazai talajmintákon vizsgálva a MARTHA adatbázison pontosított VKF-becslő módszerek szignifikánsan megbízhatóbbak a HYPRES és HUNSODA VKF-becslő módszereinél. A hy-ból kiinduló MARTHA VKF-becslések annak ellenére szignifikánsan megbízhatóbbak a WÖSTEN és munkatársai (1999) módszerénél (HYPRES), hogy utóbbit nem rontja a fizikai féleségbe sorolás hibája.A dolgozat az EU FP7/2007-2013 (Nr. 263188) MyWater és a TÁMOP-4.2.2.A-11/1/KONV-2012-0064 projekt keretében készült. A TÁMOP projekt az Európai Unió támogatásával, az Európai Szociális Alap társfinanszírozásával valósul meg.

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