Wood, bark, peat and coal ashes as liming agents and sources of calcium, magnesium, potassium and phosphorus [in Finland]

absorption de substances nutritives amendement calcique ashes avena sativa bark products calcio calcium cendre ceniza cereal crops cultivos de cereales disponibilidad de nutrientes enmiendas calizas finland finlande finlandia fosforo gramineas graminee grasses hordeum vulgare liming materials lolium magnesio magnesium nutrient availability nutrient uptake peat ph phosphore phosphorus potasio potassium productos de la madera tourbe trozos de corteza turba wood products