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| Uusitalo, Risto; Turtola, Eila; Grönroos, Juha; Kivistö, Juhani; Mäntylahti, Väinö; Turtola, Ari; Lemola, Riitta; Salo, Tapio. |
| Soil test phosphorus (P) concentration has a major influence on the dissolved P concentration in runoff from agricultural soils. Thus, trends in soil test P partly determine the development of pollution potential of agricultural activities. We reviewed the changes of soil test P and P balances in Finnish agriculture, and assessed the current setting of P loss potential after two Agri-Environmental Programs. Phosphorus balance of the Finnish agriculture has decreased from +35 kg ha–1 of the 1980’s to about +8 kg P ha–1 today. As a consequence, the 50-yr upward trend in soil test P concentrations has probably levelled out in the late 1990’s, as suggested by sampling of about 1600 fields and by a modelling exercise. For the majority of our agricultural soils,... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2007 |
URL: http://orgprints.org/17083/1/uusitalo.pdf |
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| Mäntylahti, Väinö; Laakso, Pirkko. |
| Increasing concentrations of arsenic and heavy metals in agricultural soils are becoming a growing problem in industrialized countries. These harmful elements represent the basis of a range of problems in the food chain, and are a potential hazard for animal and human health. It is therefore important to gauge their absolute and relative concentrations in soils that are used for crop production. In this study the arsenic and heavy metal concentrations in 274 mineral soil samples and 38 organogenic soil samples taken from South Savo province in 2000 were determined using the aqua regia extraction technique. The soil samples were collected from 23 farms.The elements analyzed were arsenic, cadmium, chromium, copper, mercury, nickel, lead and zinc. The median... |
| Tipo: Journal paper |
Palavras-chave: Soil quality. |
| Ano: 2002 |
URL: http://orgprints.org/17092/1/m%C3%A4ntylahti.pdf |
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