Improving water productivity (WP) through deficit irrigation is crucial in water-scarce areas. To practice deficit irriga-tion, the optimum level of water deficit that maximizes WP must be investigated. In this study, a field experiment was con-ducted to examine WP of the three treatments at available soil water depletion percentage (����) of 25% (reference), 45% and 65% using a drip irrigation system. Treatments were arranged in a randomized complete block design. The water deficit was allowed throughout the growth stages after transplanting except for the first 15 days of equal amounts of irrigations during the initial growth stage and 20 days enough spring season rainfall during bulb enlargement periods. Physical WP in terms of water use efficiency (WUEf) for treatments T1, T2, and T3 was 9.44 kg∙m–3, 11 kg∙m–3and 10.6 kg∙m–3 for mar-ketable yields. The WUEf and economic water productivity were significantly improved by T2 and T3. The WUEf differ-ence between T2 and T3 was insignificant. However, T2 can be selected as an optimal irrigation level. Hence, deficit irriga-tion scheduling is an important approach for maximizing WP in areas where water is the main constraint for crop produc-tion. The planting dates should be scheduled such that the peak water requirement periods coincide with the rainy system.

The reviewed book was written basing on Piotr Szlanta’s habilitation thesis defended in 2015 at the University of Warsaw. It deals mainly with “the Polish question”, by describing the relations between Emperor Wilhelm II and his Polish subjects. The title deals with stereotypes of the Emperor and his Polish subjects, and its evolution during subsequent decades. Piotr Szlanta managed to grasp the ambiguous relation between these two sides. On the one hand, the Emperor sought for acceptance and recognition from the side of “his Poles”, on the other hand, he underlined on almost every occasion the historical role of Germans in civilising east territories and its inhabitants. The last attempt of gaining support of Poles towards his politics and himself was an attempt of creating “The Kingdom of Poland” in autumn 1916. Piotr Szlanta’s book, basing on a broad research in various archives managed to highlight this complicated chapter of Polish-German relations.

The paper is dedicated to the memory of Professor Jerzy Wilkin, who passed away in Warsaw 10th of January 2023. Professor Jerzy Wilkin was an outstanding economist, scholar, full member of the Polish Academy of Sciences, and a professor at the Institute of Rural Development and Agricultural the Polish Academy of Sciences. The paper presents the facts of the life and scientific road of Professor Jerzy Wilkin.