Which Nitrogenous fertilizers is considered suitable for pineapple?

Ammonium sulphate is the nitrogenous fertilizer that is considered suitable for pineapple.
Pineapple plants require heavy manuring. Nitrogen increases the yield of fruit. It can absorb nitrogen in the form of ammonia, thus ammonium sulphate is the best fertilizer for pineapples.
Young pineapple plants should be fed 1 - 2 ounces of nitrogen every eight weeks, with the amount increasing by one ounce every 2 - 3 months.