Oilseed rape (Brassica napus) can grow well on almost all soils, although the highest yields are achieved on (sea) clay soils and freshly ploughed grassland. As rapeseed is a very nitrogen needy crop, crops such as alfalfa, grassland and peas are excellent pre-fertilizers. Beets, spinach and other brassica crops are not recommended in one rotation as they are host plants for the beet cyst nematode.

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Stage 1 Growing preparation
Stage 1

Growing preparation

Brassica species, including oilseed rape, are sensitive to boron deficiency. Boron affects sugar transport and flowering. A shortage will therefore have a negative influence on the yield. Especially on soils with a slightly higher pH (pH > 6.2) and/or a low organic matter content, it is advisable to administer boron during the cultivation preparation, for example in a complex form with humic acid. Humic acid promotes both root development and soil properties and thus prevents leaching of boron and other trace elements. The complexed boron is easily absorbed.

Stage 2 4-leaf stage (BBCH 14)
Stage 2

4-leaf stage (BBCH 14)

Depending on the soil temperature, the first seedlings will emerge 1-2 weeks after sowing. In the period up to winter, it is important to create as much growth as possible, without the crop already showing lengthwise growth.
Due to the rapid growth, the crop has a great need for sufficient nutrients, such as calcium, nitrogen and trace elements. Good foliage development is decisive for a good yield. Sufficient leaf mass, chloroplasts and efficient photosynthesis are crucial for the plant. To optimise all this for the plant, we have developed Optima Sugar+. This product contains the right nutrients and complexed trace elements that ensure a vital crop.

It is therefore a good idea to spray with Optima Sugar+ at the same time as the last herbicide treatment, which usually takes place during the 4-6 leaf stage.

Advice:
2 l/ha Optima Sugar+ during the 4-5 leaf stage (BBCH 14-15)

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Stage 3 Stem allongation (BBCH 32)
Stage 3

Stem allongation (BBCH 32)

When temperatures rise in early spring, the crop will prepare for length growth and then flowering. But often in spring, soil temperatures are still too low to fully meet the nutrient needs of the crop. Therefore, as soon as the crop is stretched, apply Optima Sugar+ again. The nutrients and trace elements in Optima Sugar+ contribute to a healthy leaf development and a vital crop.

Recommendation :

3 l/ha Optima Sugar+ at the start of length growth (BBCH 32).

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Stage 4 Flowering
Stage 4

Flowering

After flowering, the crop starts producing seeds. The final oil content is largely determined by the temperature during ripening. In general, higher temperatures lead to a lower oil content. To improve the quality, some spraying with Optima Leaf-K can be done in the period from the flowering phase. The element potassium is also called the 'quality element'. Potassium plays an important role in the moisture balance of a plant, but it is also essential for efficient sugar transport. Optima Leaf-K contains a high level of directly absorbable potassium. Because the potassium in Optima Leaf-K is organically complexed, it has a neutral pH, making it excellent for use in a tank mix.

Recommendation:

3x 3 l/ha Optima Leaf-K from flowering onwards, at an interval of 10-14 days.

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Stage 5 Maturing
Stage 5

Maturing

After flowering, the crop starts producing seeds. The final oil content is largely determined by the temperature during ripening. In general, higher temperatures lead to a lower oil content. To improve the quality, some spraying with Optima Leaf-K can be done in the period from the flowering phase. The element potassium is also called the 'quality element'. Potassium plays an important role in the moisture balance of a plant, but it is also essential for efficient sugar transport. Optima Leaf-K contains a high level of directly absorbable potassium. Because the potassium in Optima Leaf-K is organically complexed, it has a neutral pH, making it excellent for use in a tank mix.

Recommendation:

3x 3 l/ha Optima Leaf-K from flowering onwards, at an interval of 10-14 days.

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