Studies on the effect of phosphous fertilization on soil properties in a phosphorus rich vertisols

A field experiment was conducted in paddy in a high soil available P vertisols under K.C. Canal ayacut at Regional Agricultural Research Station, Nandyal to study the influence of levels of phosphorus either alone or in conjunction with FYM and green manure on soil properties and yield during kharif 2011. The influence of phosphorus alone or in conjunction with green manure or farmyard manure on pH and EC shows non-significant results. Application of 50% recommended dose of phosphorus along with farm yard manure recorded highest available nitrogen, phosphorus and potassium at all stages of crop growth.