Knowledge & guides

Expert agronomic advice, soil knowledge and news from the world of Bluebird.

A gloved hand holds fertilizer granules above the soil beside tomato plants.

Organic farming8 min

Rules and requirements for fertilization in organic farming - everything you need to know

The foundation of fertilization in organic farming is the continuous building of soil fertility and increasing organic matter levels.

Clods of soil in a field covered with pale lime.

Guide7 min

Why is autumn the best time to lime a field? Discover the main reasons

Autumn is the optimum time to lime a field because the period after harvest allows acidity to be neutralized and phosphorus to be unlocked before spring.

A soil cross-section showing plant roots and green shoots.

Guide6 min

What are the symptoms and effects of soil acidification? 4 main warning signs for farmers

The main symptoms and effects of soil acidification are stunted crop growth, weed invasion, yellowing leaves and damage to the root system.

A tractor with a funnel-type spreader applies fertilizer in a field.

Guide8 min

How to set up a fertilizer spreader correctly? Learn the key principles

Setting up a fertilizer spreader correctly requires coordinating the machine's working width, the tractor's forward speed and the physical properties of the granules.

Cultivated field illustrating soil liming.

Guide7 min

How and when should you lime soil? Timing, rates and choosing a lime

The best time to lime soil is after harvest, from late summer to late autumn, with rates based on current pH and soil texture.

Soil with symbols for nitrogen, phosphorus, potassium and other nutrients included in a fertilization plan.

Organic farming7 min

Eco-schemes and fertilization — how to plan nutrient management for payments?

Under eco-schemes, fertilization matters most in practices concerning carbon farming and nutrient management.

Guide6 min

Protecting against soil crusting after heavy rain

After heavy rainfall, poorly structured soils form a compacted crust that suffocates emerging seedlings and blocks air access. Calcium and magnesium rebuild the crumb structure.

Guide5 min

Enough of troublesome dust — clean spreading with Carbonate Lime

Dusty oxide lime means wasted material, uneven doses and uncomfortable work. An even 3–6 mm granule lets you spread precisely, with no dust cloud and no downtime.

Guide5 min

Magnesium Lime — a double benefit in a single granule

One operation, two elements. Calcium regulates soil pH and structure, magnesium drives photosynthesis. Magnesium Lime combines both actions in an even granule.

Guide6 min

Find out what your field really needs

Fertilising blind is a waste of money. A soil test reveals the reaction and nutrient levels, so you can choose the right fertiliser and dose for the site's real needs.

Guide6 min

Carbonate Lime — the foundation of modern cultivation

Without regulated pH, even the best NPK fertilisation will not work. Regulating the soil reaction is the foundation on which the effectiveness of all agronomy rests.

News4 min

Bluebird at the Agrotech 2026 fair — let's meet!

On 13–15 March 2026, the largest agricultural fair in Central Europe will be held at Targi Kielce. Visit the Bluebird stand: Hall 11, Stand A20.

Guide6 min

Calcium and the plant — what does soil liming do and how does it affect yield?

Calcium is a building block of cell walls and regulates the plant's water balance. On strongly acidified soils, liming can increase maize yield by as much as several dozen percent.

Guide7 min

Black chalk with humus — how to retain water in the soil during drought?

Increasing humus content by 1% can raise the soil's water-storage capacity by as much as around 150 m³ of water per hectare. Learn how humic acids and lake chalk work.