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Soilless hydroponic cultivation of cucumbers (Cucumis sativus L.) has expanded rapidly during the last few decades. One of the key factors in achieving high productivity in industrial greenhouses is the choice of growing medium. Rockwool has become dominant, especially in Europe. However, in addition to energy consumption during production, landfilling of rockwool as a non-biodegradable material is expensive and poses an environmental risk. Therefore, there is increasing use of organic substrates in the soilless c...

Garlic (Allium sativum L.) is among the main bulbous vegetable known worldwide for both economic and health value. The research was conducted in the framework of the project on the modernization of winter garlic cultivation to ensure guaranteed yield in the organic production system. The new technology is designed to prevent the effects of unfavourable soil and climatic conditions on the rooting and wintering ability of garlic ? factors that significantly affect the garlic production in Latvia. Field studies were ...

Great cormorant Phalacrocorax carbo are frequent nesting in colonies in trees next to water bodies or on islands of Latvia?s lakes. The present study was done to evaluate the effect of great cormorant colonies on the soil chemical composition and vegetation on two islands of Lake Kanieris in a long term, 2010-2017. While great cormorants were distributed unevenly, two different sites on each island were set up, one representing a site without vegetation, the other ? a site with vegetation. To characterize the back...