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Natalia Znojkiewicz, Dariusz Korzeniewski and Martyna Wiciak
] Massod S. H., Armitage K., Brandt M.: An experimental study of laser-assisted machining of hard-to-wear white cast iron, International Journal of Machine Tools & Manufacture, (2011), Vol. 51, p.450-456.  Olszak W.: Obróbka skrawaniem, WNT, Warszawa 2008.  Ozler A.I.L., Ozel C.:Theoretical and experimental determination of tool life in hot machining of austenitic manganese steel, International Journalof Machine Tools & Manufacture (2001), Vol. 41,p.163-172.  PN-EN 1563:2000, Odlewnictwo, Żeliwo sferoidalne
B.V. Shalyuta and E.V. Kostitskaya
The article presents the results of two-year studies on the influence of the method of sowing and the level of nitrogen application on the yield of seeds of Silphium perfoliatum L. − a new fodder crop for the conditions of Belarus. Silphium is precious for the nutritive value of green mass. According to the literature sources, dry matter contains 16-28% of protein, more than 60% of nitrogen-free extractives, 13-23% of sugars, high content of mineral substances, a small amount of fiber, adequate calcium and phosphorus, carotene, vitamin C. Mineral composition of Silphium contains 17.6% of dry matter, including 152.3 mg·kg−1 of ash. Macro elements: calcium – 18.1, phosphorus − 2.55, manganese – 4.48, potassium – 24.03, sodium – 0.40, sulphur – 0.40 mg· kg−1 of mg· kg−1 of dry matter. The mass of 1000 seeds was from 23.7 to 25.5 g. The seed germination was good and varied from 75% to 84%. It has been established that the best way to sow the Silphium is planting seedlings according to the 70x30 scheme. This option ensured the yield of seeds of 3.6 and 3.7 c/ha. The applying of increased doses of nitrogen fertilizers N90 and N120 and sowing seeds ensured the yield of seeds ranging from 3,6 to 3,9 c·ha−1.
Edyta Kardas, Pavlína Pustějovská and Silvie Brožova
. Wolters Kluwer Polska, Warsaw. Maszke, A., Dwornicka, R, Ulewicz, R., 2018. Problems in the Implementation of the Lean Concept at a Steel Works - Case Study . MATEC Web of Conferences, 183, DOI: 10.1051/matecconf/201818301014 Parma, V. 1988. Correlation between the content of manganese and silicon and sulphur in pig iron . Metallurgy – Metal Engineering, 55(4), 111-114. PN – 93/H – 01010/02, 1993. Metals. Definition and classification of pig iron . Polish Committee of Standardization. Sabela, W., Brzezinski, P., Buzek, J., 2005. Factors