Original scientific paper

FERTILIZATION OF AGRICULTURAL LAND USING GIS AND PRINCIPLES OF ELECTRIC CONDUCTIVITY OF SOIL

Željko Barač ; Poljoprivredni fakultet Osijek, Sveučilište J.J.Strossmayera, Osijek, Hrvatska
Mladen Jurišić ; Poljoprivredni fakultet Osijek, Sveučilište J.J.Strossmayera, Osijek, Hrvatska
Pavle Marić ; Poljoprivredni fakultet Osijek, Sveučilište J.J.Strossmayera, Osijek, Hrvatska
Ivan Plaščak ; Poljoprivredni fakultet Osijek, Sveučilište J.J.Strossmayera, Osijek, Hrvatska

Abstract

In 2011 and 2014 on the experimental fields of Belje scientific research was conducted on the electrical conductivity of the soil and its importance in inventory making. Maps of conductivity and maps of nutrients for mineral fertilization (KCl, MAP) were created. This study has confirmed the hypothesis on the importance of applying the principle of electrical conductivity in determining the properties of the soil and creating a map of nutrients for mineral fertilization using an EC scanner. In terms of application of the methods in accordance with electrical conductivity of the soil, it is evident that standardly (or conventionally) used randomized method contains patterns that are not sufficiently homogeneous and precise, while the predictive method is more advanced and the samples are more homogeneous and better represent the state of the production area. Comparison of randomized method and “Z scheme” when making a map of nutrients shows that the consumption of mineral fertilizers KCl with “Z scheme” is significantly higher. When creating a map of nutrients (MAP) their comparison shows a significant reduction in consumption of fertilizer with the “Z scheme” method. With the use of “Z scheme” the entire area is covered and the samples are more homogenous and more precise. For that method it has been found that the amount of the applied KCl fertilizer is twice as large while the amount of the applied MAP fertilizer is twice as small less. During the research using “Z scheme” method 324 GPS points were counted, while using randomized method 252 GPS points were counted so that using this method it is not necessary to cover the entire area. This fact indicates that in the mapping of nutrients the “Z scheme” method is particularly reliable in predicting and determining the amount of fertilizer. The application of the principle of electrical conductivity or the creation of electrical conductivity charts achieves a more precise sampling, and the creation of forage charts allows for a more significant precision and effectiveness of fertilization.

Keywords

vegetable production; electroconductivity; map of nutrients; EC scanner

Hrčak ID:

175722

URI

https://hrcak.srce.hr/175722

Publication date:

15.2.2017.

Article data in other languages: croatian

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