https://ojs.sazu.si/fagopyrum <p><em>Fagopyrum </em>is a publication of the Slovenian Academy of Sciences and Arts (SAZU), published by its class of Natural Sciences. It is published twice a year on the web page of SAZU (<a href="http://www.sazu.si/publikacije-sazu">http://www.sazu.si/publikacije-sazu</a>). </p> <p>Since 1981 to 1985 it was published as the Bulletin of International Buckwheat Research Association (IBRA). Since 1986 it is registered in Slovenia as a scientific journal under auspices of IBRA. Back volumes are available at <a href="http://www.sazu.si/publikacije-sazu">http://www.sazu.si/publikacije-sazu</a>. In 1995 was a gap in publishing. From 1998 to 2016 it was published in Japan (Shinshu University, Ina, editor Toshiko Matano; Kyoto University, Kyoto, editor Ohmi Ohnishi; Kobe Gakuin University, Kobe, editor Kiyokazu Ikeda). Since 2017 the owner and publisher is the Slovenian Academy of Sciences and Arts (SAZU).</p> Slovenian Academy of Sciences and Arts (SASA) en-US Fagopyrum 0352-3020 https://ojs.sazu.si/fagopyrum/article/view/8087 <p class="Tekstzamik"><span lang="EN-GB">Growing crops as cover or companion crops, as well as for green manure, forms the basis of sustainable and organic field crop production. This practice helps reduce soil degradation and supports sustainable soil management. The aim of this field study was to evaluate the effects of crop management systems on the growth and biomass yield of two varieties of common buckwheat. The crop management systems tested were: common buckwheat (Zoe and Harpe) grown alone (control), intercropped with sorghum (<span class="Tekstitalic">Sorghum bicolor</span>), intercropped with a mixture of lacy phacelia (<span class="Tekstitalic">Phacelia tanacetifolia</span>) and white mustard (<span class="Tekstitalic">Sinapis alba</span>), and grown in postharvest wheat residues (straw). The experiment was laid out in a randomized complete block design with three replicates. Data were collected on plant height (cm), number of leaves/plant, number of branches/plant, total leaf area/plant (cm²), stem diameter (cm), and biomass yield (t/ha). Crop management systems had a significant effect on the number of branches/plant, stem diameter, and overall biomass yield of buckwheat. The highest biomass yield (1.13 t/ha dry weight) was obtained from Harpe variety intercropped with <span class="Tekstitalic">Phacelia + Sinapis</span>, while the lowest value 0.71 t/ha was recorded in the control. Given the high biomass yields, intercropping common buckwheat with <span class="Tekstitalic">Phacelia + Sinapis</span> mixtures is a promising option for green manure production. Although the buckwheat varieties differed in number of leaves, leaf area, and number of branches/plant, the variety used did not have a statistically significant effect on biomass yield.</span></p> Sunday Ebonka Nwajei Jana Pexová Kalinová Copyright (c) 2026 Fagopyrum https://creativecommons.org/licenses/by-nc-nd/4.0/ 2026-02-02 2026-02-02 43 1 5 13 10.3986/fag0051 https://ojs.sazu.si/fagopyrum/article/view/8088 <p>Changes of the quantitative and qualitative parameters of buckwheat were observed on gleyic Fluvisols (locality Milhostov, Slovak Republic) at different tillage between 2013 and 2015. The experiment was conducted using two soil tillage treatments: conventional tillage and reduced tillage, and three conditioner application treatments: soil conditioner PRP SOL, a combination of soil conditioner PRP SOL and plant auxiliary substance PRP SOL+EBV, and control. <br>In buckwheat crops, basic physical properties were also monitored. The statistically significantly higher yields of buckwheat were achieved with reduced tillage. Significant differences were found in buckwheat yield between years. <br>The lowest yields of buckwheat were recorded in the dry and extremely hot year of 2015. In the variant with conventional tillage, better values of basic soil physical properties were recorded compared with the reduced tillage. Significantly higher yields of buckwheat were found with applications of conditioners than in the control. The application of plant auxiliary substance PRP SOL+EBV on the variant with PRP SOL did not substantially increase the yields of buckwheat. The content of nitrogen substances in the grain of buckwheat was dependent on the fertilization options. Higher content of nitrogen substances in the grain of buckwheat was found in the control than with the application of conditioners. A negative correlation was found between the yield and nitrogen substances in the grain of buckwheat (r = -0.74).&nbsp;</p> Ladislav Kováč Božena Šoltysová Copyright (c) 2026 Fagopyrum https://creativecommons.org/licenses/by-nc-nd/4.0/ 2026-02-02 2026-02-02 43 1 15 23 10.3986/fag0052