Effective fertilization with phosphorous and potassium

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Appropriate application of phosphorous and potassium is very important in plant cultivation. Those elements have a direct impact on the growth and condition of each plant. If P and K are deficient, yield may prove disappointing.

Phosphorous and adequate development

Phosphorous deficiency in the soil has a negative impact on the roots of the plant. The plant is unable to absorb water and other nutrients in the appropriate manner. Due to deficiency, the growth of the stem and leaves is hampered, the plant becomes smaller and changes color: from matte dark green to purple or red.

Consequently, phosphorous in the soil is crucial in the early stage of plant development, when its growth is the fastest. This means that phosphorous needs to be applied before the sowing. Should phosphorous be lacking in the soil, the yield will not be rich in seeds (cereal grains). There is no need to be afraid of applying excessive dosage of phosphorous, as the plants do not tend to absorb excessive quantity of the element. We need to be careful with nitrogen and potassium, though, as in this case the rule is not applicable.

Unfortunately, fertilization with phosphorous is neglected in most farms, despite the fact that the results of analysis of Chemical and Agricultural Stations are very poor.

Deficient potassium in Polish soil

Is the story with potassium similar? Yes, potassium is another element which is deficient in the soil on Polish farms. Poland, in contrast with the Southern European countries, is located in a zone of soil deficient in potassium. Therefore, it is necessary to apply this element each year, in accordance with the fertilization demand of the plantation. Potassium is lacking the most in peaty soil. In the case of mineral kinds of soil – the lighter they are, the less potassium they have. In peaty soil, potassium deficiency may be serious. As a result, fertilization needs to be done regularly, each spring.

What does potassium have an impact on?

Just as in the case of phosphorous, potassium influences the roots of the plant. The element stimulates the creation of new stems, and reduces water loss in the plant. What is important for the farmers, potassium makes the plants more resistant to diseases and pest, and boosts their resistance to frost.

Potassium deficiency makes the plant limp and very prone to slight water deficiencies. However, excessive quantity of potassium is also harmful for the plant and the soil.