Healthy soil. Healthy crops.
More productive farming.

Organic toxicity in rice

15–25 days after transplanting or sowing, rice grows slowly, leaves turn yellow and tillering is poor. Pulled-up plants show dark, blackened roots with few white roots and a foul smell; gas bubbles rise from the field.

• Straw, stubble and undecomposed organic manure buried in flooded fields break down without oxygen (anaerobically).
• This produces toxic H₂S and CH₄ gases and organic acids, while soluble iron (Fe²⁺) builds up to excess.
• Rice roots are poisoned, blackened and rotting, and cannot take up nutrients, so leaves yellow even when enough fertiliser has been applied. Hot, sunny weather makes the process faster and more severe.

Tiến Nông Vinafer

Drain the field, let it dry lightly for 2–3 days and stir the mud to release the toxic gases. Then apply Vinafer – an easily absorbed chelated micronutrient fertiliser that helps rice quickly put out new white roots, regreen and tiller strongly.

Acid and acid sulphate soils

Stunted plants with short, sparse roots and yellow or purple leaves; in acid sulphate fields the water is clear with a rusty-yellow film and the soil smells sour. Lots of phosphate is applied but the crop is still short of phosphorus.

• Acid soil (pH below 5.5) contains many H⁺ ions and dissolved aluminium (Al³⁺), which are toxic, shorten roots and kill root tips.
• Aluminium and iron in acid soil lock up phosphorus, so most of the phosphate applied cannot be taken up.
• In acid sulphate soils, pyrite (FeS₂) oxidises on contact with air to form sulphuric acid, driving pH very low. Beneficial microorganisms are also less active in acidic conditions.

Tiến Nông Soil pH Conditioner

Apply Soil pH Conditioner before sowing, transplanting or planting to raise pH, supply calcium and magnesium, reduce aluminium and iron toxicity and release locked-up phosphorus for the crop. Apply it first, then nitrogen and phosphate 7–10 days later.

Degraded, infertile soil

Soil is hard, pale, dries quickly and holds nutrients poorly. Yields fall season after season even as fertiliser rates rise each year.

• Continuous cropping, mainly with chemical fertilisers and little organic matter returned, gradually depletes soil humus.
• Without humus the soil loses its loose structure, and its capacity to hold water and nutrients (CEC) falls, so fertiliser is easily leached.
• The soil also becomes poor in beneficial microorganisms and depleted of secondary and micronutrients after years of crops removing them without replacement.

Tiến Nông soil restoration package

Combine product groups step by step: add organic matter and humic substances to restore humus and soil structure; correct pH; apply balanced NPK for the crop; add secondary and micronutrients. A Tiến Nông agronomist will recommend a programme suited to each field.

Yellow leaves in pineapple

Pineapple leaves turn pale yellow then yellowish-white, especially young leaves; plants are stunted, grow slowly, bear small fruit and yield poorly.

• Pineapple is very sensitive to iron deficiency. In many pineapple-growing soils, iron is in a poorly soluble form, especially where the soil is high in manganese or the pH is unsuitable, so roots cannot take up enough.
• Iron deficiency prevents the plant from making enough chlorophyll, so leaves yellow and photosynthesis suffers. Accompanying zinc and nitrogen deficiency makes it worse.

Tiến Nông Vinafer Special

Use Vinafer Special, formulated for pineapple, which supplies easily absorbed chelated iron and micronutrients to regreen the leaves. Combine it with Tiến Nông's pineapple NPK for balanced growth and large, even fruit.