Leaf Npk Fluctuations and Their Relationship with Yield of Guava in the Annual Cycle in Alfisol

At attempt was made to utilise the variation in the leaf NPK contents as a guide for their needs by guava Cv. Allahabad Safeda in the annual cycle. Need for nitrogen was observed in July and November, while for potassium it was February and June. No indication on the phosphorus need was available. Positive correlation were highest between July N status and rainy season fruit yield, November N status and winter fruit yield; and July K status with rainy season fruit yield. Critical levels of these nutrients for the yields in different seasons were proposed.