For their harmonic development, all plants need adequate secondary element supplies. Calcium, magnesium and sulphur are in fact required in considerable quantities by plants, even if these are stile inferior to microelement requirements.
Secondary elements carry out many functions; that is why deficiencies in these elements or altered balance relations among them lead plants to real “suffering” conditions. Diseases related to secondary element deficiencies are very common to all crops: flowering plants, vegetables and fruit trees. “Extensive” crops (maize, wheat, sugar beet, soya, sunflower) and fodder plants are not immune from this phenomenon too.
Sulphur is present inside the plant in organic form and, more precisely, as a constituent element of some sulphurated aminoacids (cystine, cysteine, methionine) and of many enzymes that regulate the growing process. “Crucifer” plants require considerable quantities of this secondary element and, since it is not very mobile, the sulphur deficiency is shown by a widespread chlorosis of terminal young leaves, by stunted growth and poor germination. Calcium contributes to the formation of the cell membrane. It is indispensable in apical meristems, where it reaches very high levels. It also carries out a mechanical action of resistance; it encourages nitrogen absorption and it regulates water equilibrium. Calcium deficiency leads to necrosis, tissue rottenness and root browning; fruit preservability is compromised.
Magnesium, whose behaviour is similar to calcium, is very important at vegetative level, for chlorophyll synthesis and as essential element of many enzymes. Magnesium deficiency appears in older tissues (adult leaves) and it is often related to potassium surplus. Calcium deficiency, magnesium deficiency and altered relations between K/Ca and K+Mg/Ca are at the base of serious crop disorders:

- apical rottenness in tomato and pepper;
- edge desiccations in lettuce and celery;
- leaf and brank desiccation in melon;
- pulp deteriorations in nectarines;
- leaf-dropping in apple tree;
- bitter-pit in apple tree;
- drying of the vine rachis;

Prevention and cure of these diseases are possible by treating crops with specific formulations that AGROFILL® has tested and made available for a long time. This range includes:


“AGROMAG” Line .
It is made up of liquid and powder formulations with high magnesium content readily assimilable through the leaves as well as through the roots.

MICROWAX
Its action against early leaf-shedding in pomaceous plants is clearly evident. Anyway, it can be applied whenever a strong magnesium contribution is required.

AGROCAL .
It brings calcium in chelate form (Ca EDTA).

“BUTTERFILL” Line .
Formulations for leaf application whose primary action against bitter pit is particularly effective. Because of the high calcium content, they can also be used to prevent and cure all diseases related to calcium deficiencies, especially on tomato, celery, pepper and lettuce.

DRY-STOP .
Corrective for leaf application which brings calcium and magnesium at the same time. Conceived to prevent and treat desiccations typical of melon and lettuce.

BOROMAG Ca .
It’s a combination of calcium, magnesium and boron. Thanks to its particular formulation, BOROMAG Ca can be employed right from pre-flowering and flowering stage on fruit trees, vegetables and flowering plants.

TIOFILL L .
It is conceived to prevent and treat sulphur deficiency. Its application field is wide and ranges from fruit trees to vegetables, from industrial to extensive crops.