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Uurimistulemustest selgus, et punase ristiku kasvatamine külvikorras avaldab soodsat mõju mikroorganismidele, tõstes mullamikroobide aktiivsust. Pestitsiididega töödeldud tavaviljelussüsteemides oli mulla mikroobide aktiivsus ja orgaanilise süsiniku sisaldus võrreldes mahesüsteemidega madalam.

Center of Excellence for Estonian Studies Republic of Estonia, Ministry of Culture Eesti Vabariik, Kultuuriministeerium European Regional Development Fund

Agriculture is facing severe changes due to climate change and extreme weather events. Attention to climate change has been high- lighted in the Common Agricultural Policy, the issue of risk management. Implementation of risk management methods among farmers who make their everyday business decisions in uncertainty, is part of decision making, and depends on the farmers experience and knowledge. This paper aims to find out the assessments of Estonian farmers about the risk factors arising from climate change and the importance of coping adaption measures to climate change. Data from a web-based questionnaire survey of questions with structured statements on perception of production risk and adaption measures were analysed. The main results showed that perception of production risk differed by farmers’ age, geographical area and farm sizes. Relevant risk management practices were different according to farm annual revenue, geographical area and the age of a farmer. The results could be used by agricultural policy makers. Future policies for the agricultural sector are elemental to ensure success in farm- scale implementation. Based on this study it could be further explored risk management practices, which are already used by farmers. It is important because climate change and extreme weather events are increasing, and risk management practices are needed for adaptation.

The study examined the content of reducing sugars in various varieties of potato, beetroot, turnip and pumpkin most commonly grown in Estonia. This study aimed to determine the varieties of vegetables with the lowest levels of reducing sugars after harvesting and after storage at two different temperatures (3 and 8 C). In the present study it was found that the potato variety with the lowest content of reducing sugars after harvesting and after six months of storage was potato variety 'Birgit' with 0.19 g 100 g–1after harvesting, 0.98 g 100 g–1 after storage at 3 C and 0.38 g 100 g–1 after storage at 8 C, respectively. All three varieties of the beetroot, after harvest, contained a similar amount of reducing sugars. After six months of storage, the lowest content of reducing sugars was determined for variety 'Boro' with 1.22 g 100 g–1 at 3 C and 0.96 g 100 g–1 at 8 C, respectively. The lowest average concentrations of reducing sugars from turnips were after harvest in the variety 'Kohalik sinine' with 3.38 g 100 g–1. Also after storage, the same variety had the lowest content of reducing sugars with 8.36 g 100 g–1 at 3 C and 3.76 g 100 g–1 at 8 C, respectively. From the pumpkin varieties, the lowest reducing sugars contents were determined for variety 'Gold Medal' with 2.64 g 100 g–1after harvesting, 2.40 g 100 g–1 after storage at 3 C and 1.90 g 100 g–1 after storage at 8 C. It can be concluded that all studied vegetables stored at 3 °C contained higher amounts of reducing sugars than those stored at 8 °C.

Center of Excellence for Estonian Studies Republic of Estonia, Ministry of Culture Eesti Vabariik, Kultuuriministeerium European Regional Development Fund