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Halina Ruszniak-Rybak (born August 8, 1943 - June 28, 1992 Suchodołoy) was a Polish scientist and an expert in agriculture and plant cultivation. Her impact on the field was seen in her many publications; supervision of dozens of master's students; and the organization of conferences and training courses for agricultural engineers as well as for farmers.

Personal Life
Halina Ruszniak was born on August 8, 1943 in Suchodołoy, Poland – a city near Lublin.

Education
Halina Ruszniak-Rybak began her studies with a chemical-mechanical specialization in technical college. In 1963 she continued on to attend Agricultural University in Poznań in the Department of Agriculture (Wydział Rolniczy Wyzszej Szkoły Rolniczej w Poznaniu). After graduating with a diploma in 1967, she received professional training during her internship at Agricultural Pilot Plant in Marcelin (Rolnicze Zakłady Doświadczalne Ogrody-Marcelin). One year later in 1968, she began what would be her lifetime employment at her home University at the Agronomy Faculty (Katedra Ogólna Uprawy Roli i Roślin). She received her PhD in 1976 under the direction of Józef Dorywalski. The title of her thesis was The impact of row spacing, the method, period, volume of sowing and spring harvesting on the white clover seed yield (Wpływ rozstawy rzędów, sposobu, terminu i ilości wysiewu oraz wiosennego przykaszania roślin na plon koniczyny białej uprawianej na nasiona). She furthered her study of the white clover seed in her post-doctoral thesis of 1989 entitled, The effect of some environmental and agrotechnical factors on the seed yield of white clover (Trifolium repens L.) (Wpływ niektórych czynników siedliskowych i agrotechnicznych na plon nasion koniczyny białej (Trifolium repens L.)), for which she received her degree in 1990.

Work
Halina Ruszniak–Rybak conducted studies on the seed production and the agricultural techniques of clover and seradella. She worked on the soil type, method and period of sowing, crop cultivation, fertilization, drying, crop, weed control (including herbicide selection); determined the methods and periods of sowing and harvesting of seradellas. She authored 36 papers, scientific monographs and many more publications including information leaflets and instructions; 64 master’s theses were written under her supervision. Ruszniak-Rybak organized the conferences and training courses for agricultural engineers as well as for farmers.

Honors
Halina Ruszniak–Rybak was a member of the Soil Science Society of Poland (Polskie Towarzystwo Gleboznawcze) and the Polish Society for Agronomy (Polskie Towarzystwo Nauk Agrotechnicznych).