RELATIONS BETWEEN THE CLIMATOLOGICAL CONDITIONS AND THE CONTENT OF NUTRIENT ELEMENTS IN CARNATIONS GROWN IN GREENHOUSES
The results obtained show that the nutrition of the plants is similar for the three types of substratum tested. There is at times some relation between the absorption of certain elements, the illumination and the mean temperatures. The production tends to be higher when the organic matter content of the substratum increases, but this difference is not significant.
Variations of the equilibria N-P2O5-K2O and CaO-MgO-K2O in the leaves and cuttings have been studied.