Hi,
I don't think so i can tell exact number of test cases you 
should write for above example. It's all depend on your 
perception towards it.
But i can tell you what type of test cases you can write.
For example:
For all 3 text boxes and button you will have to write +ve 
and -ve test cases as follows:

1. Survey no.:
# +ve test case would be enter the / and - special chars.
# -ve would be enter special chars. other than the above
# enter alpha chars
# the length of the survey no and blank,so on

2. Village name and Project Name :
Same as mentioned above like
# enter only alpha chars
# enter alphanumeric and/or special chars
# for blank
# the input range is given from 2-50 chars. So using 
  equivalence partioning,BVA,error guessing validation 
  techniques write the test cases
# and so on

Submit button:
# press Enter key
# on click
# press Alt ot Ctrl key combinations
# on submit check for mandatory fields

I hope this would help you.