home  - about us - nutrients - products - crop deficiencies - analysis - links - news - contact
















Nitrogen is a major component of proteins, hormones, chlorophyll, vitamins and enzymes essential for plant life. nitrogen metabolism is a major factor in stem and leaf (vegetative) growth. Too much nitrogen can delay flowering and fruiting. Deficiencies can reduce yields, cause yellowing of the leaves and stunt growth.

fielder feeder

fielder N36

fielder NPK


Phosphorus is necessary for seed germination, photosynthesis, protein formation and almost all aspects of growth and metabolism in plants. it is essential for flower and fruit formation. Low pH(<4) results in phosphate being chemically locked up in organic soils. Deficiency symptoms are purple stems and leaves; maturity and growth are retarded. Yields of fruit and flowers are poor. Premature drop of fruits and flowers may often occur. Phosphorus must be applied close to the root in order to achieve maximum utilisation.  Large applications of phosphorus without adequate levels of zinc can cause a zinc deficiency.

fielder fighter

fielder phos


Potassium is necessary for formation of sugars, starches, carbohydrates,  protein synthesis and cell division in roots and other parts of the plant. It helps to adjust water balance, improves stem rigidity and cold hardiness, enhances flavour and colour on fruit and vegetable crops, increases the oil content of fruits and is important for leafy crops. Deficiencies result in low yields, mottled, spotted or curled leaves, scorched or a burned look to leaves.

fielder slicker

fielder high k df

fielder high k liquid


Sulphur is a structural component of amino acids, proteins, vitamins and enzymes and is essential to produce chlorophyll. It imparts flavour to many vegetables. Deficiencies show as light green leaves. Sulphur is readily lost by leaching from soils.

fielder sulfur 90

fielder sulphate


Magnesium is a critical structural component of the chlorophyll molecule and is necessary for functioning of plant enzymes to produce carbohydrates, sugars and fats. It is used for fruit and nut formation and essential for the germination of seeds. deficient plants appear chlorotic, show yellowing between the veins of older leaves; leaves may droop. Magnesium is leached by watering and must be supplied when feeding. It can be applied as a foliar spray to correct deficiencies.

fielder magnesium + N

fielder magnesium df

fielder magnesium C


Calcium activates enzymes, is a structural component of cell walls, influences water movement in cells and is necessary for cell growth and division. Some plants must have calcium to take up nitrogen and other minerals. Calcium is easily leached. Once deposited in plant tissue it becomes immobile so there must be a constant supply for growth. Deficiency causes stunting of new growth in stems, flowers and roots. symptoms range from distorted new growth to black spots on leaves and fruit. Yellow leaf margins may also appear.


calcium 36



Fielder (UK) Ltd