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SOIL PROPERTIES OF TYPICAL IRRIGATED SEROZEM SOILS BY
ELEVATION LEVEL BASED ON GIS TECHNOLOGY
Normatov Yodgor Mamanazarovich
Researcher
э-mail: yodgor-normatov@mail.ru
phone +99899 476 79 24
Baxodirov Zafar Abduvalievich
(PhD) senior scientist
э-mail: Baxadirov @mail.ru
phone +998998176114
Tursunov Shodmon Togʼaevich
(PhD) senior scientist, t.w.
+99893 456-64-76
Institute of soil science and agrochemical research
https://doi.org/10.5281/zenodo.16760711
Abstract.
The article presents data on the content of humus, phosphorus,
potassium, physical clay, dry matter and bulk density of typical irrigated
serozem soils distributed in the Jizzakh region at various altitudes using GIS
technology.
Key words
: Soil, humus, phosphorus, potassium, physical clay, dry matter,
bulk density, GIS technologies, altitude, typical soil.
Introduction.
Nowadays, with its numerous capabilities, GAT is being used
in agriculture, as in other sectors. In particular, it is used to perform tasks such
as agricultural environmental management, planning, and decision-making.
Based on GAT, a number of works are being carried out on remote sensing,
monitoring water quality, microbiological activity, and plant distribution in the
agricultural sector [1].
Using traditional methods to conduct various studies on soil takes some
time. As computer technology has developed, new methods have emerged to
map the properties of soil. Remote sensing, global positioning using GAT
programs, and analysis of various properties over time are methods [2].
Research object and methods.
Typical irrigated serozem soils of the
“Laylak Uya” massif of the Zamin district of the Jizzakh region were selected as
the research object. The study was carried out on the basis of the Instructions
for conducting soil surveys and compiling soil maps for maintaining the state
land cadastre [3] and generally accepted methods.
General chemical and
physicochemical soil analyses were performed according to generally accepted
methods based on the manuals of Ye.V. Arinushkina [4]. Analysis based on
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geographic information systems was performed using the ArcGIS program and
its Geostatistical Analyst modules.
Research results and their analysis.
The humus content of the study area
was determined by altitude. In particular, the highest humus content (0,81-
1,2%) was observed in irrigated areas at low altitudes (480-530 m) and
amounted to 489,74 hectares, while a decrease in humus content was observed
in areas at medium (531-580 m) and the highest altitudes (581-634 m).
According to the results, soils with low and medium humus content in terms of
hectares prevail at low, medium and high altitudes.
Exchangeable potassium plays an important role in plant life, contributing
to good plant growth and development and increasing disease resistance. The
highest exchangeable potassium content (201-300 mg/kg) was found in the area
of 359,9 hectares of soils at altitudes of 480-530 m. A decrease in exchangeable
potassium content was observed at medium (531-580 m) and high (581-634 m)
altitudes. Its highest content is found in areas with low altitudes and moderately
supplied groups.
Mobile phosphorus, that is, phosphorus, is essential for good plant
development and increases the strength of stems and roots. It was found that at
low (480-530 m) altitudes, the area occupied by mobile phosphorus (16-30
mg/kg) was 307,5 hectares, while at medium and high altitudes, the amount of
mobile phosphorus decreased.
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Picture 1. Map of the elevation of the “Laylak uya” massif above sea
level
In terms of mechanical composition, medium loamy (31-45%) soils occupy
the largest part of the irrigated land at low altitudes (480-530 m), accounting for
443,8 hectares. It was found that medium loamy areas are less common at
higher altitudes. In terms of mechanical composition, medium loamy soils are
widespread in large areas at low and medium altitudes, and their share is
dominant over soils of other mechanical compositions.
49,6% of the irrigated
land area of Jizzakh region is considered medium loam [5].
In irrigated soils, salinity is mainly determined by the amount of dry matter
in the soil (this only includes determination by dry matter). At low altitudes
(480-530 m), the area with a dry matter content of 0,136-0,160% was found to
be 204,2 hectares. At medium and high altitudes, the area with a dry matter
content of 0,136-0,160% was found to be less than a hectare.
At low altitudes, the area in hectares with a dry matter content of 0,136-
0,160% in soil composition was higher, while at medium and high altitudes, the
area with a dry matter content of 0,136-0,160% decreased.
Picture-2
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Picture-2.Dynamics of changes in soil properties at different altitudes
of irrigated soils in the selected reference area.
The bulk density of the soil indicates its density and water permeability. It
was found that 507,55 hectares of irrigated land at low altitudes (480-530 m)
had a bulk density of 130-139 g/cm³, which is within the acceptable range for
soil density at this altitude.
Conclusion.
In conclusion, it is worth noting that, according to the results
of the study, it was found that in the study area, areas belonging to the group
with an average (0,81-1,2%) soil humus content were higher at low altitudes
(480-530 m).
This indicator was not high at medium and high altitudes. Areas with a
mobile phosphorus content of (16-30 mg/kg) occupy a large part of the
territory.The amount of exchangeable potassium was (201-300 mg/kg). Areas
with a physical clay content of (31-45%), a bulk density of 130-139 g/cm³, and a
dry residue content of 0,136-0,160% were identified, occupying large areas at
low altitudes
References:
1.
Hong S. Y. et al. Geographic information system and remote sensing in soil
science //Korean Journal of Soil Science and Fertilizer. – 2010. – Т. 43. – №. 5. –
С. 684-695.
2.
Sreekanth P. D., Debarup Das D. D. Applications of remote sensing and GIS
in soil science. – 2016.
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3.
Koziev R.K., Abdurakhmonov N.Yu. and others. Instructions for conducting
soil surveys and compiling soil maps for maintaining the state land cadastre.
Tashkent-2013. 52 p.
4.
Arinushkina. E.V. Guide to chemical analysis of soil. Moscow, 1970.
5.
Abdurakhmonov. N.Yu. Recommendations on the condition of soils of the
Jizzakh region and agrotechnologies for the placement and cultivation of
agricultural crops on low-fertility lands. Tashkent-2017.9-p
