Sir,

I wish to establish a realtionship betwwen crop yield and water
balance parameter like rainfall, rainy day, rainy season duration, dry
spell in weeks, drought free period ( AET/PET), wrsi, water surplus,
deficit, moisture index etc.
i had worked out the simple correlation but a multiple regression
equation is to be developed. therfore , kindly suggest me that which
factors i can combined and how a curvilinear relationship ca be
developed. i had SPSS12 also.

with regards and again a very happy Deepawali.

anil kothari