Nitrogen deficiency in plants
Nitrogen is one of the most important elements that contribute to the development of the plant, therefore, when it is lacking the symptoms are varied and evident. In general there is a more stunted development of the plant, which sometimes degenerates into a real dwarfism, due to a lower photosynthetic activity. The leaves, in fact, are prey of yellowing (chlorosis) which initially appears on the older leaves at the base of the branches, to then extend to the apical ones. The yellowing is followed by necrosis and the fall of the leaves themselves.
Another serious consequence of the lack of nitrogen is the sterility of the plant, with an easy detachment of the flowers and, later, the fall of the little fruits. Even if the fruits are formed they are not very juicy and seedless. In general the plant ages faster and is easily prey to pests and fungal diseases. It is also less resistant to frost. All these symptoms are particularly evident in citrus plants and in particular in the lemon which offers a complete sample of the consequences of the lack of nitrogen. Nitrogen deficiencies usually occur during periods of higher growth, such as in spring, when the need for plant growth is high. For the fertilizations they will have to be more frequent in that period. Be careful not to exceed the doses, because in this case the fertilization would prove, on the contrary, harmful: carefully evaluate the interventions before applying them. Keep in mind that nitrogen is an easily washable element in the ground, so avoid the rainy periods; in general it is good to stagger the fertilizers in a longer period. Therefore we advise to spread the fertilization in more dilated times trying to avoid excess nitrogen in the soil. Intervene during vegetative growth and growth, even if a small but constant nitrogen fertilization can be carried out throughout the year.