Effect of phosphorus, potassium, and calcium on peanuts at Mauke (Cook Islands)

Abstract The effects of phosphorus, potassium, and calcium on ‘Virginia’ runner peanuts grown in Nuata clay loam were examined in a 2 × 2 × 2 factorial experiment. Phosphorus and calcium together gave large increases in peanut yields; either element applied separately was relatively ineffective. Potassium depressed yield when applied in association with phosphorus and calcium.