2.1.1. Field Site

The two-year study was conducted in 2015 and 2016 on three di fferent locations. Field trials were located in two distinct counties of Croatia, Virovitica-Podravina County in Lukaˇc (45◦5226" N 17◦2509" E) and Vukovar-Sirmium County in Tovarnik (45◦0954" N 19◦0908" E), while greenhouse trial was set up in Zagreb at the Faculty of Agriculture, Department of Agricultural Zoology (45◦8277 N, 16◦0309 E).

#### 2.1.2. Characteristics of the Soil

To determine the physical and chemical soil properties in Lukaˇc and Tovarnik, soil samples were taken in 2016 according to an internal protocol for annual crops provided by the Department of Plant Nutrition (University of Zagreb Faculty of Agriculture). At each site, 15 individual soil samples were taken on the same date from a depth of 0–30 cm, evenly distributed over the entire plot. A homogenized sample was prepared and 1.000 g were extracted for analysis. Chemical soil properties and texture analyses were carried out according to standard methods (ISO 11277 2004) in the pedological laboratory of the Department of Soil Science University of Zagreb Faculty of Agriculture.
