Change.

We cannot grow the same or related plant species every year. There are many reasons for this. The most important are:

- unilateral use of nutrients. Plants with strong, a deep root system also draw nutrients from deeper layers. Some vegetables have the ability to use harder compounds. Plants with a weak root system require better fertilization in the top layer of soil.

- the spread of diseases and pests appropriate for a given group of plants.

- strong whatening of the field remaining after some, vegetables. They are conducive to the weeding of plants that are difficult to weave, and not shading soils, np. peas, and also vegetables with a long emergence.

- secretion by the roots of some plants harmful to themselves and related plants.

- plant requirements for manure fertilization. In the first year after the manure of manure, vegetables with high food requirements and the long vegetation period are grown, which will still be able to use nutrients released from this fertilizer. They are: onion, cucumbers, cauliflower, Selery, dwarf pores and tomatoes. Plants with a short vegetation period, requiring a large amount of easily available ingredients, such as lettuce, spinach, radish, We cultivate as a shell after plants shocked by manure or spring in the second year after manure.

In the second year - apart from the mentioned - we can also grow plants with a deep root system - high tomatoes, carrot, parsley, and also beans for a green pod, which, despite the fact that it binds nitrogen from the air with the help of bacteria, will be grateful for a good position.

In the third year, we can grow butterfly and beets.

Changing is therefore necessary, to make organic fertilization fully used, so that the disease and pests of plants do not spread and to facilitate the fight against weeds.