Facskó Ferenc (szerk.) (2012): Kutatások a Nyugat-magyarországi

Kutatások a Nyugat-magyarországi Egyetemen
data can be mapped by GIS methods to ensure visualization of within fi eld diff erences. Soil
moisture and soil electrical conductivity measurements are two relatively easy methods to
determine variability of soil characteristics within fi eld.
In our examination we carried out fi eld measurements with the purpose of determining soil
characteristics on the investigated research fi eld where site-specifi c crop production was
applied since 2001. The instruments applied were:
1. A hand-held Spectrum Field Scout TDR-300 type soil moisture probe further equipped
with a data logger and GPS receiver. Data transfer was via RS-232 port, the rods were 20 cm.
Due to the additional equipments we could automatically collect volumetric soil moisture
data with additional coordinates.
2. The other instrument was a vehicle-pulled specifi c Veris 3100 Electrical Conductivity
meter. This instrument was equipped with GPS-connection too. This tool underway
permit of continuous measurement and with this it assures the necessary number and
density of data.
In the research we looked for an instrument which provides enough data for precise mapping
of soil characteristics and helps to decide the boundaries of various management
zones within fi eld. In the investigated fi eld we have found that soil electrical conductivity
measurement provides enough data for soil characteristics measurements, furthermore
correlation between soil electrical conductivity and soil moisture content was R2=0.79 in
the best case (R2=0.74 in the worst), therefore in the investigated area soil moisture mapping
can be carried out by means of indirect, semi-online data collection.
I. VIRÁG – M. CSIBA – G. MILICS – N. SMUK – M. NEMÉNYI (2011): Evaluation of Variable Rate
Fertilization Technology with the help of geospatial processing programs. 8 th European
Conference on Precision Agriculture, július 11-14., pp. 352-357.
Abstract – In this study a modern, nutrient replenishment plan-based Variable Rate
Fertilization system (spinner disc applicator) was tested with respect to accuracy and
traceability. The as-applied rates were compared to the prescribed rates. The correlation
between the data set of prescription map to the data set of as-applied map was determined.
In areas of the management zones, the correlation coeffi cient between the as-applied and
prescribed rates was 0.87. This result was attributed to scattering that was attributed to a
sluggish system response (when changing from low to high application rates). When the
tramlines of the tractor were close to the neighbouring management zones, the distribution
was done beyond the border of the actual management zone. This is another important fact
that aff ects the accuracy of the distribution work.
G. MILICS – N. SMUK – V. NAGY – J. DEÁKVÁRI – M. NEMÉNYI (2012): The role of microrelief
measurements in precision agriculture. In: HARCSA Marietta (szerk.): Proceedings of
the 11 th Alps Adria Scientifi c Workshop. Budapest: Akadémiai Kiadó, pp. 403-406.
Abstract – Micro relief measurements are providing information on the small scale diff erences
concerning relief within fi eld. Precision agriculture measurements nowadays can be
carried out by sub-inch accuracy, therefore micro relief measurements have provided accurate
information on the surface of our experimental research fi eld near Mosonmagyaróvár,
Hungary. Within fi eld diff erences on yield permanently appears in the experimental fi eld.
Yield is determined by various factors, such as nutrient replenishment, soil chemical and
physical properties etc. Subsurface water resources such as soil moisture and groundwater or
in other words inorganic green water and its regime have also signifi cant role on yield. Available
water for the vegetation – being “blue” or “green” – therefore determines the success of
plant production. Surface of the cultivated fi eld in every case has diff erences in height above
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