Hints and tips:
...To survive, commercial crops need — in descending order of importance — three main macronutrients: nitrogen, phosphorous and potassium, often abbreviated to NPK after their periodic table symbols....
...The generic term “fertiliser industry” actually refers to three different crop-yield-enriching elements: nitrogen, phosphorus and potassium, or “NPK”....
...In a difficult year for global mineral fertiliser industry, PhosAgro has fared better than its peers thanks to its flexibility....
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