Top fruit weight is an important element for increasing yields. Provided that a desired quality is maintained, the aim of growers is to produce heavier fruits. Crop nutrition plays an important role on increasing top fruit weight.
Nitrogen form is important for yields. Calcium nitrate forms are readily available and can produce higher yields. Compared to ammonium nitrate, calcium nitrate also has an effect on maintaining soil pH, improving tree growth and ensuring other nutrients are more available.
Calcium activates enzymes and is essential for cell division, elongation, and fruit growth.
Phosphorus has a direct effect on yield. As the season develops, leaf phosphorus concentration decreases, with phosphorus being transferred to the fruit. As fruit weight increases, so does the amount of phosphorus in the fruit. Thus, it is important to ensure supplies are not limiting throughout the season to maintain good growth and steady accumulation of phosphorus in the fruit.
Where supplies are inadequate, potassium yield responses have been recorded following applications of up to 600-700 g/K/tree in low density orchards. Some of this yield increase comes from an increase in fruit weight. However, applications need to be adjusted according to soil potassium levels: where levels are high, high K fertilizer rates may lead to a yield reduction, mainly due to a reduced uptake of other cations (Mg and Ca).
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12-4.8-14.9 + 8% S - Prilled NPK fertilizer which also contains magnesium and sulphur as well as micronutrients ideal for use on a wide range of arable and horticultural crops.
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15.5% N + 19% Ca - Granular calcium nitrate fertilizer for field application to a wide range of crops.
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A fully formulated flowable liquid micronutrient fertilizer containing 700 g/l zinc for foliar application to prevent and treat zinc deficiency on a wide range of crops.
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A liquid micronutrient fertilizer containing 150 g/l boron for foliar application to provide additional boron or to treat boron deficiencies in a wide range of crops.
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A liquid micronutrient fertilizer containing high concentrations of phosphate and calcium for foliar application to improve yield and quality in fruit and potatoes.
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A liquid micronutrient fertilizer containing 160 g/l calcium for foliar application to control and reduce calcium related disorders in top fruit and other crops.
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A flowable liquid suspension fertilizer with nutrients and micronutrients including magnesium, zinc, nitrogen, boron and phosphate for foliar application to improve the flowering of top and soft fruit.
