Vladimir Zebec

Comparison of Chemical Extraction Methods for Determination of Soil Potassium in Different Soil Types

Determining potassium supply of soil plays an important role in intensive crop production, since it is the basis for balancing nutrients and issuing fertilizer recommendations for achieving high and stable yields within economic feasibility. The aim of this study was to compare the different extraction methods of soil potassium from arable horizon of different types of soils with ammonium lactate method (KAL), which is frequently used as analytical method for determining the accessibility of nutrients and it is a common method used for issuing fertilizer recommendations in many Europe countries. In addition to the ammonium lactate method (KAL, pH 3.75), potassium was extracted with ammonium acetate (KAA, pH 7), ammonium acetate ethylenediaminetetraacetic acid (KAAEDTA, pH 4.6), Bray (KBRAY, pH 2.6) and with barium chloride (

Efficiency of maize irrigation scheduling in climate variability and extreme weather events in eastern Croatia

K_{BaCl_2 }

DEFICIT IRRIGATION OF SOYBEAN ( GLYCINE MAX . (L.) Merr.) BASED ON MONITORING OF SOIL MOISTURE, IN SUB -HUMID AREA OF EASTERN CROATIA

KBaCl2, pH 8.1). The analyzed soils were extremely heterogeneous with a wide range of determined values. Soil pH reaction

Pogodnost lesiviranih tala za navodnjavanje na području Istočne Hrvatske

\left( {pH_{H_2 O} } \right)

The Response Of Maize (ZEA mays L.) Grain Yield to Water and Nitrogen Supply in An Eastern Croatian Environment

(pHH2O) ranged from 4.77 to 8.75, organic matter content ranged from 1.87 to 4.94% and clay content from 8.03 to 37.07%. In relation to KAL method as the standard method,