Kindly see in the sabhari sudha triganitha panchangam where they have written seed sowing; begining of work in plot and house digging in well; digging of tank, putting tree seedlings; garden forming; to take deekshai; forming new villages are things which should not be done. All other subha karyams can be done.during agni nakshathra naal.
In kanchi aacharyal madathu panchangam AGNI NAAL; suryan sancharikkum kaalam from Bharani 3 rd patham to Rohini 1st padham is called as agni nakshathra naal. During this time ,and during ushna sikai, agni yogam, kari naal, erama, thivaama, paapa graham nirkum nakshathram, and the next and previous to this star : on these days you should not do graha aarambham, graha pravesam, pandalkaal; deva prathistai .
USHNA SIKAI; aswathyy/pooram 1st paadam; Bharani/Anusham 4th paadam; uthradam 2nd padam and Sadayam 3rd paadam are called
ushna sikai. AGNI YOGAM; sunday-sapthami/dwadasi; monday-shasty/ekadasi; Tuesday panchami/sapthami; wednesday- dwithiyai/astami;
Thursday-shasty and navami; Friday- astami/dasami; saturday navami/ekadasy . If the thithy and days are coming like this ; on those days you should not do subha karyams.
VISHA YOGAM; If it comes like this sunday panchami/hastham; monday shasty and thiruvonam; Tuesday sapthami ans aswathy; wednesday astami and anusham,; Thursday-thruthiyaia nd poosam; Friday Navami and revathy saturday-ekadasi and rohini ;Marriage should not be done on these days.
For Mruthu yogam, uthpadha yogam, and dhaktha yogam You can do 4 hours after the begining of time of that thithi or star.