Using Geostatistical Methods for Characterization of Variations in the Agrochemical Properties (Based on the Study of Arable Lands in Northern Kazakhstan)

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2016, . 158, . 2 ISSN 1815-6169 (Print)

. 259–276 ISSN 2500-218X (Online)

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10.02.16

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ISSN 1815-6169 (Print)

ISSN 2500-218X (Online)

UCHENYE ZAPISKI KAZANSKOGO UNIVERSITETA. SERIYA ESTESTVENNYE NAUKI

(Proceedings of Kazan University. Natural Sciences Series)

2016, vol. 158, no. 2, pp. 259–276

Using Geostatistical Methods for Characterization of Variations in the Agrochemical Properties (Based on the Study of Arable Lands in Northern Kazakhstan)

K.G. Giniyatullina*, S.S. Ryazanova,B.R. GrТРШr’вКЧb, I.V. Shakirzyanovc, R.V. Shakirzyanova, E.S. Vaganovaa, A.G. Galiullinaa

a

Kazan Federal University, Kazan, 420008 Russia

b

Institute for Problems of Ecology and Mineral Wealth Use, Tatarstan Academy of Sciences, Kazan, 420087 Russia

AO “AtКmОkОЧ AРrШ”, Kokshetau, 020000 Republic of Kazakhstan E-mail:*ginijatullin@mail.ru

Received February 10, 2016

Abstract

The agrochemical properties (humus content; available forms of nitrogen, phosphorus, and potassium; pH; and specific electrical conductivity of water extract) of two tracts (1468 and 1378 ha) of the arable land from Petropavlovsk region of Northern Kazakhstan have been studied. The research shows that these tracts can be considered as belonging to the same type according to the average values and varia-bility of their agrochemical properties. However, the analysis of experimental variograms indicates that the fields are significantly different from each other by spatial variability of the agrochemical properties. It has been demonstrated that interpolated cartograms of availability of the chemical elements in the fields require differential selection of methods for data interpolation that correspond to the results of vario-gram approximation.

Keywords: arable soils of Northern Kazakhstan, agrochemical properties, spatial variability, geosta-tistical analysis

Acknowledgments. This study was performed as part of the Russian-KКгКФС SR ЩЫШУОМЭ “EЬЭТЦК

t-ТЧР ЯКЫТКЛТХТЭв ШП ЭСО ЦКТЧ КРЫШМСОЦТМКХ ЩЫШЩОЫЭТОЬ ШП КЫКЛХО ХКЧНЬ ТЧ ЭСО TOO MТМСuЫТЧЬФТТ”.

Figure captions

Fig. 1. Experimental variograms of the soil properties and adjusted models. Dots designate experimental variograms of tract no. 1, dashed line shows its model; triangles are experimental variograms of tract no. 2, line is adjusted model.

Fig. 2. Interpolated cartograms showing the availability of nitrogen, phosphorus, and potassium com-pounds in the tracts of the studied arable land.

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