optimum time of sowing and yield of sunflower?

Question

Effect of time of sowing and yield of sunflower

Answer 1

Try this:

http://www.jeffersoninstitute.org/pubs/sunflower_guide.pdf#search='sunflower%20crop'

or this:

http://www.sunflowernsa.com/uploads/cqr/cqr2000.PDF#search='sunflower%20crop'


It'd help to know where you're located.