Technical guides on phosphorus availability, nutrient form, application rates and field diagnosis. Written for people who have to defend a specification internally.
GUIDE
Two bags can both say 18% P₂O₅ and behave nothing alike. What the label hides.
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A crop-by-crop table for tobacco, potato, citrus, rice and vegetables.
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Where it comes from, which crops suffer, and how nitrate grades avoid it.
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Basal versus top-dressing, rates by stage, and what the trials showed.
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Concentration, timing, tank-mix limits and drone application.
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How to decide with arithmetic rather than instinct.
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Insoluble content, salinity and nitrogen form — three numbers that decide.
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Old leaves or new leaves: the first question that eliminates half the options.
Read →Ask us directly. We answer in writing, usually the same working day.
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