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Question: sowing

after a harvest I can sow all kinds of vegetables or are there incompatibilities? thanks

Answer: sowing

Dear Pino,
often in the family garden one does not think about it, but as it happens in the fields cultivated by expert peasants, even in small gardens it is good to rotate the cultivated vegetables, and this for various reasons.
First of all, every single cultivated vegetable releases particular remains in the soil deriving from the discarding of its metabolism, or even due to portions of the plant left in the soil; cultivating the same plant for months, re-seeding it continuously, these remains tend to accumulate, making them harmful.
In addition to this, every plant cultivated in the garden has its roots at a different depth, so if we continue to grow tomatoes in the same plot over the years, we will use the mineral salts contained only at a certain depth, leaving the most untouched. or less profound.
In addition to this, every type of vegetable consumes in particular some mineral salts at the expense of others; therefore a flowerbed in which we have cultivated the courgettes, will be not very hospitable towards its own courgettes, since the previous generation has removed from the ground most of the fundamental mineral salts for these plants.
And the parasites?
Parasites tend to prefer some plants rather than others, if we continue to cultivate the same plant in the same plot, we will already have parasites waiting for it, whether it is mushrooms or insects; more: it often happens that the spores of the mushrooms remain in the ground when we have eradicated the vegetables that lived in that soil: if we plant the same vegetables, the mushrooms will already be ready to infest it. The same applies to the weeds, which tend to adapt to the crops that surround them, if we vary the crops, we stress the weeds, which will tend to develop less effectively.
In general, some large groups of vegetables are considered: tomatoes or other solanaceae (peppers and aubergines), legumes, courgettes (and relatives, such as pumpkins, cucumbers), root vegetables, and leafy vegetables. There are also different types of subdivision of vegetables, in fact there are also those who, instead of subdividing the vegetables by family, subdivides them by quantity of organic substance and minerals used; in this case zucchini and tomatoes are combined in the same group, because they consume many mineral salts.
In practice you should try to rotate these different groups of vegetables in your parcels, in order to make the most of the soil; so where are you growing tomatoes, at the end of the season you will plant salad, next year you will put green beans and the year after some carrots (to give you an example).
Remember that legumes in general live in symbiosis with bacteria that fix the nitrogen in the air in the soil, therefore growing legumes always enriches the nitrogen soil, making it more fertile in practice; then look over time to grow legumes in a plot, at least once every 3-4 years.
Another tip: don't do like my father, who year after year forgets where he put tomatoes or zucchini; equip yourself with a notepad, draw us your garden, and indicate which vegetables you are planting, as a reminder for the next sowing or for the preparation of next year's garden.