Fertilizer trial in maritime pine, 14 years. n.b person at control plot is W. Pritchett (University of Florida).

Tower view of area of fertilizer trials. Mimizan.

View of fertilizer and drainage. Large trees had both, smaller trees had fertilizer only. Mimizan.

Maritime pine. Person is Professor Douglas Malcolm (Edinburgh). Les Landes.

Norway spruce planted on large clearcut (coup a blanc). Poitiers.

Norway spruce planted on large clearcut (coup a blanc). Poitiers.

Potassium deficiency in Corsican pine. Saint-Front, Dordogne.

Potassium deficiency in Corsican pine. Saint-Front, Dordogne.

Potassium deficiency in Corsican pine. Saint-Front, Dordogne.

Potassium deficiency in Corsican pine. Saint-Front, Dordogne.