Tomato

In autumn when light levels and temperature drop and humidity increases, it is better to decrease the nitrate level to make the plant more generative. Growing the plants in a vegetative manner would decrease production, since sugars would be used for leaf and stem growth instead of fruit formation.

Lack of nitrogen will turn the color of old leaves pale green, the flowers will turn pale yellow and plants may mature earlier leading to lower yield and quality. Excess of nitrogen will cause thick stems, big leaves and big flower trusses followed by poor fruit set.

Open field growers will use less nitrogen at the start of the cultivation to steer the crop from vegetative growth to more generative growth.
Processing tomatoes in certain cases may require more nitrogen compared to fresh tomatoes.

A low soil temperature can decrease the uptake of phosphorus at the beginning of the growth season. Phosphorous is also needed for the vegetative growth and fruit set periods. Besides a low temperature, a high pH can also reduce the availability of the phosphorous in the soil.

In case of deficiency, the plant appears to be stunted and leaves may be a darker green. Later the underside of the leaves will have a red/purple color, especially the old leaves. Leaves are small and turned slightly downwards.

Excessive levels of phosphorous are very uncommon but can lead to zinc deficiency. High levels of phosphorous in drip irrigation water can easily lead to precipitation.

Two thirds of all the potassium that is taken up by the plants is needed for the formation of the fruits. A lack of potassium will lead to problems of irregular
coloring, puffiness, boxy fruit and cracking. Cracking of the fruit can also be caused by uneven watering. Potassium is also important at the stage of transplanting and to reduce drought and salt stress.

Deficiency will lead to reduced growth and chlorosis followed by necrosis on the old leaves. Chlorosis will first appear at the margins of old leaves. Post-harvest quality will be poor.

Uptake of potassium can be limited in anaerobic rooting conditions, with low root-zone temperatures or when there are high levels of magnesium and calcium.

as well as S-bonds in some hormones, vitamins, glucosides, sulfolipids and coenzyms.Sulfate is often used to reduce the amount of nitrate given to tomatoes, and therefore to make the crop more generative. In the past sulfur deficiency was very rare due to atmospheric deposition. A reduction of sulfur emissions from industry and traffic, along with the development of higher yielding varieties, makes it more likely today that deficiency could occur.

Deficiency will cause the upper leaves to turn light green. To correct this sulfur can be applied as sulfate or as thiosulfate.

It is therefore important for rigidity and strength of the tissues, which influences the shelf life of the fruit. Deficiency will lead to burning of tips and edges of
young leaves. Blossom end rot is the most well-known physiological disorder caused by calcium deficiency. Calcium deficiency can be caused by lack of calcium or high salinity in the root zone, but watering strategy and large variations in relative humidity can also influence the risk of blossom end rot. The nitrogen source plays an important role in the uptake of calcium for cultivation in substrate. Nitrogen applied as ammonium will decrease the uptake of calcium.

At that moment the uptake of potassium increases, leading to a decrease in the uptake of magnesium. This will lead to chlorotic spots in the old leaves but rarely leads to a reduction of the yield.

Each litre of KTS supplies approximately 360 g of potash and 252 g of sulfur, providing a highly concentrated source of soluble potassium and sulfur. Its nitrate-free and chloride-free formulation allows potassium to be supplied without adding unnecessary nitrogen or chloride.

Potassium supports water regulation, enzyme activity, carbohydrate transport and the development of crop yield and quality, while sulfur contributes to protein and enzyme formation. KTS is particularly valuable during periods of rapid growth, reproductive development and crop filling, when potassium requirements can increase substantially.

KTS can be used through fertigation, in starter or side-dress programmes, in compatible liquid fertiliser blends and as a foliar treatment on selected crops. Its versatility allows potassium and sulfur to be delivered at critical stages within a wide range of crop nutrition programmes.

Each litre of CaTs supplies approximately 75 g of calcium and 125 g of sulfur, providing both nutrients in a fully soluble liquid form. CaTs combines crop nutrition with soil-management benefits and can be incorporated into a broad range of fertilisation programmes.

Calcium contributes to cell-wall strength, root development and the structural integrity of growing plant tissues, while sulfur supports protein and enzyme formation. A consistent calcium supply is especially important during periods of rapid vegetative growth and fruit development, helping support crop quality, firmness and marketability.

CaTs can be applied through irrigation systems, banded, broadcast or blended with compatible liquid fertilisers. It may also be used as a soil amendment to provide soluble calcium, support soil aggregation and water infiltration, and help manage the effects of excess sodium in saline or sodic soils.

Its fine crystalline formulation dissolves rapidly and completely, producing a clean spray solution with minimal residue. This makes K-Leaf particularly suitable for precision spraying and for situations in which crops require a rapid supplementary supply of potassium and sulfur.

Applied directly to the foliage, K-Leaf helps prevent or correct potassium and sulfur deficiencies during critical growth stages. Potassium supports water regulation, photosynthesis, carbohydrate movement and crop quality, while sulfur contributes to protein synthesis and essential metabolic processes.

K-Leaf can supplement soil fertilisation when nutrient uptake through the roots is restricted or when crop demand temporarily exceeds soil supply. It is suitable for a wide range of broad-acre, fruit and vegetable crops and can be combined with many compatible soluble fertilisers and crop-protection products following a compatibility test.

The chloride-free, nitrogen-free formulation of GranuPotasse provides an efficient source of potassium and sulfur, making it ideal for chloride-sensitive crops and high-value production systems. The uniform, free-flowing granules ensure accurate spreading, easy handling and consistent field performance.

By supplying potassium and sulfur in readily available forms, GranuPotasse supports water regulation, enzyme activation, carbohydrate transport and protein synthesis, helping improve crop yield, quality and marketability. It is particularly beneficial for fruit, vegetable and other high-value crops where crop quality, storage life and export potential are essential.

GranuPotasse® is suitable for pre-plant, basal and in-season applications and can be broadcast, banded or incorporated into the soil. It also blends readily with many granular fertilizers, providing growers with a flexible solution for balanced potassium and sulfur nutrition across a wide range of cropping systems.

SoluPotasse provides potassium and sulfur without nitrogen or chloride, allowing both nutrients to be managed independently within the crop nutrition programme. Its fine crystalline form dissolves rapidly and completely, making it suitable for demanding fertigation applications.

Potassium supports water-use regulation, enzyme activation, carbohydrate transport and crop quality, while sulfur contributes to protein formation and nutrient metabolism. SoluPotasse is particularly useful when crops require additional potassium but no further nitrogen, including during fruit, tuber and grain development.

SoluPotasse can be applied through fertigation and other systems designed for fully soluble fertilisers. Its low-chloride, nitrogen-free composition makes it well suited to chloride-sensitive crops, saline growing conditions and fertilisation programmes requiring precise control of nitrogen and potassium inputs.