inscription
Portail d'information géographique

Résultats de la recherche (20 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • OLSEN, M.
  • Long-term response of soil Olsen P and organic C to the depletion or addition of chemical and organic fertilizers
  • Soil degradation and water pollution could have resulted from inappropriate phosphorus (P) supply. Soil Olsen P is generally a good indicator to estimate bio-availability of P and environmental risk in alkaline soil. The change in Olsen P is always
  • strongly affected by soil organic carbon (SOC) when different forms of inorganic and/or organic P are applied to farmlands with chemical fertilizer and/or manure. The AA. related soil Olsen P to apparent P balance (APB) and SOC in alkaline soils at three 15
  • correlated with Olsen P. The combination of chemical P and manure P with organic C input is a better strategy to increase soil Olsen P and SOC accumulation on farmland with maize–wheat rotation in northern China.
  • Effects of different soil management practices on total P and Olsen-P sediment loss : a field rainfall simulation study
  • Field rainfall simulations were conducted in 2002 and 2005 to study the effects of different soil management practices on the total phosphorous (TP) and Olsen-P losses by soil erosion and redistribution along a 15 m long slope in Luoyang, Henan