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Nitrogen fertilizer

Nitrogen in the soil

Not all soils are suitable for cultivation: gardeners know this well, just as they know that different types of plants can need different types of soil. For this reason, the selection of the plants to grow in the garden will also take into account the characteristics of the same, together with the climatic ones, while for pot cultivation it will be done so as to select a soil that can well host the chosen plants. The soil is, in fact, the source of nourishment for plants and the state of health, strength and vigor of the crops will depend on its composition. Some elements, in particular, are necessary for the development of any plant and must therefore be present in the right quantities in the soil. Nitrogen is among these: it is a predominant substance in plant tissues, also present in chlorophyll and in a variable percentage from 3% to 6% within plant tissues. When the soil is not able to guarantee the right supply of nitrogen, perhaps because it is not sufficiently rich or because it has already been largely absorbed by the plants, it is possible to intervene with nitrogen fertilizers able to restore the right balance.

Nitrogen fertilizers


Nitrogen fertilizers are available on the market in different types, which can adapt to meet the needs of practically any plant species. Nitric fertilizers are those that are absorbed faster by plants, but for this reason they have a not very long lasting effect. They are therefore particularly suitable for periods of greatest growth, such as spring, when new branches develop from the buds and before flowering. The urea and ammonia fertilizers, on the other hand, are characterized by a slower release and for this reason they are suitable for spreading in moments of slower growth and sowing, when the plant needs nourishment to develop and to grow. Slow release fertilizers are usually organic, i.e. they contain nitrogen in organic form. They are indicated for the periods of planting of plants in the ground and for the period following sowing as they are durable over time. Nitrogen fertilizers can be purchased in liquid form or in granules to be spread on the ground: the choice will be dictated by the specific needs of the plant. Within the same garden, therefore, despite the uniformity of the soil, the use of different types of nitrogen fertilizers may be required to meet the needs of individual plants.

Amount of nitrogen


As we have seen, nitrogen is a fundamental element for the growth and development of plants, but this does not mean that its presence must always be the same in every period of the year and for every crop. On the contrary, these characteristics largely influence the quantities of fertilizer to be used. Especially for less experienced green thumbs, therefore, it is advisable that they be advised in the dosage based on the assessments relating to the needs of the individual plant and the type of soil. Many fertilizers also offer the possibility of enriching the soil with multiple elements combined together, to create the perfect nutritious blend depending on the plants you want to grow. Among the main elements we remember calcium and potassium, essential for most plant species.

Nitrogen fertilizer: Spread the fertilizer


Even the spreading of nitrogen fertilizerit must be carried out in such a way as to favor absorption by plants in the best possible way, to avoid the risk that the operations will be useless. Fertilization can take place in two main phases: those on bare ground are distinguished from those on cover. The first take place on the worked soil before the plant is planted, while the second concerns the plants already placed in the ground. In compliance with the quantities calculated on the basis of the quality of the soil and the plants it will host, slow release nitrogen fertilizers are spread on bare soil, usually in the form of granules: the aim is to make the soil rich in substances that can be consumed over a long time by the plant. On the roof, on the other hand, nitrogen fertilizer is spreadquick release, used in the periods of the year of greatest need, corresponding to the vegetative awakening of the plant. In this case, for greater convenience, it is possible to add the fertilizer directly to the watering water, being careful to avoid too high a concentration in a single area but taking care to carry out the operations in such a way as to favor the spreading as much as possible. uniformity of nitrogenous substances, which will thus be absorbed by the soil and consequently by the roots of the plants. Fertilization, therefore, can also be carried out several times throughout the year, in compliance with the specific needs of one’s own vegetation.

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