Fifty years ago, the Swedish long-term soil fertility experiments were started by the late Prof. Sven L. Jansson to “elucidate the nature of soil fertility, to provide a basis for soil evaluation and soil conservation”. At that time, the use of mineral fertilisers was still minor and a major concern was the consequences for soil fertility of completely replacing animal manure with mineral fertilisers due to separation of animal and crop production. The main questions were the extent to which different cultivation measures affect yields and the levels of production that could be reached and maintained under different conditions.
The experiments have provided valuable insights into soil fertility in relation to crop production and fertilisation. They still answer questions that arise regarding new practices and their impact on soil and the environment. They are used as a platform for new research tasks and modelling driven by structural changes in agriculture. Furthermore, differences developing in soil conditions over time provide valuable information for addressing complex interactions in an appropriate way. This report recognises the great significance of long-term field experiments for our understanding of agricultural production, soil fertility and environmental issues and illustrates main findings from on-going long-term activities.
Vagn J. Brøndegaard (1919–2014) ägnade hela sitt liv åt att dokumentera och systematisera folklig kunskap om växters användning och föreställningar om dem. I detta bokverk samlas 80 av Brøndegaards uppsatser om alla möjliga aspekter på växter.
Hur påverkar vårt leverne i den rika världen de som lever i den fattiga? Vi ser torka i Australien, översvämningar i Indonesien, skyfall i Europa och i Afrika som där ofta leder till omfattande jorderosion. Rapporterna om hur vi människor bidrar till klimatförändringarna är många. Men vilka konsekvenser får klimatförändringarna för möjligheterna att mätta allas munnar?
The ’Academy Blue Book’ describes global fisheries and aquaculture from the points of view of sustainable ecosystems, economy, trade and development. The main objective is to provide an overview of fisheries and aquaculture, their natural conditions and their significance for economic development and people’s livelihoods. A further objective is to show the impact of rich countries on the developing world within this sector through trade, aid and global fisheries.
Årets höstnummer. Klimat, miljö, blandskog, oxidativ dubbel reformering… och mycket annat!
