Viticulture – existing vineyards
For vineyards, basic testing (pH, available amounts of phosphorus and potassium) and the examination of magnesium, from both the top soil layer as well as from the subsoil, are recommended, as a large portion of the vine roots also grows into deeper soil layers.
In addition to making a detailed recommendation, examining the lime content and lime activity (when suspecting problems with lime tolerance of rootstocks or signs of lime-induced chlorosis), the content of plant-available trace elements (iron, manganese, copper, zinc, boron) and the exchangeable cations should be considered.
Viticulture – establishing new vineyards
When examining both the top soil layer as well as the subsoil's pH level, the available amounts of phosphorus and potassium as well as the content of plant-available magnesium is required as a basis for determining an appropriate reserve supply fertilisation.
To facilitate the selection of suitable rootstocks, the lime content as well as lime activity should additionally be examined.