If your foliage is looking a reddish, purple color, it could be a sign that you're facing a phosphorus deficiency in plants. There are 17 essential plant nutrients for growth, and phosphorus is ...

The quickest way to treat a phosphorus deficiency is with a chemical fertilizer that contains a high percentage of phosphorus, the P in the NPK ratio found on most fertilizer packaging.

PREVIOUS attempts 1,2 to induce symptoms of calcium and phosphorus deficiency in oil palm seedlings grown in water-washed quartz sand have failed. Symptoms have now been induced by growing oil ...