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Root vegetables and tubers

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Fertilization in carrots

The cultivation of carrots has increased over the last years. Driven by stronger demands for yield and quality, the production is concentrated more and more on specialized farms.

 For an optimized nutrition management, foliar fertilizers can be applied preventive as integrated part of the fertilization strategy or if it comes to an undersupply with nutrients and visible symptoms. Besides soil analysis, the additional leaf analysis can help to analyze and recognize the availability for each element.

 

Lack of phosphorus and magnesium

Results of the complex plant analysis have shown a significant deficiency of phosphorus and magnesium (half of all analysis) over the last years.

A magnesium deficiency (figure 01) will be visible with yellow, followed by brown leaf tops on older leaves.

phosphorus deficiency (figure 02) is indicated by reddish leaves, particularly at the midrip. The growth is limited and plants remain small.

magnesium-deficiency (pic 01)

lack of phosphurus (pic 02)

Fertilization with boron, zinc, manganese and molybdenum

An undersupply with boron will limit growth and quality as well (cracks on the carrots).

A deficiency with zinc will cause a reduced auxine metabolism with small leaves and limited growth at the end.

The lack of manganese will be visible by yellow coloring between the leaf nerves. First symptoms are occure on younger leaves. This is in contrast to undersupply with magnesium where first first symptoms appear on the oldest leaves.

 An undersupply with boron will limit growth and quality as well (cracks on the carrots).

A deficiency with zinc will cause a reduced auxine metabolism with small leaves and limited growth at the end.

The lack of manganese will be visible by yellow coloring between the leaf nerves. First symptoms are occure on younger leaves. This is in contrast to undersupply with magnesium where first first symptoms appear on the oldest leaves.

A deficiency with molybdenum will cause the cracking of carrots.

All our informations and recommendations are based on various field trials done in the last years. Our knowledge and experience in combination with the complex plants anaylsis can help to optimize production, yield and quality. 

 Lebosol®-Magphos improves initial development of carrots

Agravis Raiffeisen AG, Abbenhausen, Niedersachsen, 2009-2013

 

Fertilization after results of a complex plant analysis increases the yield of carrots

Agravis Raiffeisen AG, Abbenhausen, Niedersachsen, 2011-2014

 

Main recommendations

Aim/Problem Recommendation Time
Improvement in effectiveness and tolerability of soil-applied herbicides 0,2 - 0,6 l/ha Herbosol® (Increase to 0.6 l/ha on light soils with a low humus content; reduce to 0.2 l/ha for heavy soils with a high humus content.) With soil-applied herbicides
Promotion of root formation, growth 5 - 10 l/ha Aminosol® 7 - 10 days after planting
Improvement in effectiveness and tolerability of plant protection products 150 - 300 ml Aminosol® (per 100 l spray water) With plant protection products
Improvement in effectiveness and tolerability of plant protection products 1 - 2 l/ha Aminosol® With post-emergence herbicides, in extreme weather conditions
To cover periods with poor growth conditions 4 - 6 l/ha Lebosol®-Total Care In the event of stress at the site
Calciumtransport, Ertrag, Knöllchenbildung, Qualität (Risse bzw. hohle Knollen, innere Verbräunung) 1 - 4 times 2 - 3 l/ha Lebosol®-AqueBor SC +
1 - 2 times 0,25 l/ha Lebosol®-Molybdänor1 - 4 times 2 - 3 l/ha Lebosol®-AqueBor SC (Mo)
Once sufficient leaf mass has developed
Improvement in leaf quality, photosynthesis rate, N efficiency 2 - 3 times 1 l/ha Lebosol®-Mangan GOLD SC Once sufficient leaf mass has developed
Calcium transport, internal quality, vitamin synthesis 1 - 3 times 0,5 l/ha Lebosol®-Zink 700 SC Once sufficient leaf mass has developed
Improvement in quality and shelf life 2 - 4 times 5 l/ha Lebosol®-Kalium 450 Once sufficient leaf mass has developed
Improvement in leaf quality, chlorophyll, vitality, photosynthesis rate 2 - 3 times 3 - 5 l/ha Lebosol®-MagSOFT SC Once sufficient leaf mass has developed
Storage stability, increase in resilience 3 - 4 times 4 - 6 l/ha Lebosol®-Calcium-Forte SC Once sufficient leaf mass has developed
Vitalisation, improvement in the photosynthesis rate, resilience, internal quality 2 - 4 times 4 - 6 l/ha VITALoSol® GOLD SC Once sufficient leaf mass has developed
Initial development, vitality, energy and water balance, N efficiency 1 - 2 times 5 l/ha Lebosol®-Magphosor1 - 2 times 6 - 8 l/ha Lebosol®-PK-Max Once sufficient leaf mass has developed
Treated crops are avoided by mice 3 - 5 times 5 l/ha Lebosol®-Schwefel 800 OD When required
Treated crops are avoided by furred game 2 l Aminosol® (With 2 l water 2 - 3 days beforehand (quantity for 1 ha)) When required