1)
What is the meaning of "El Yadi"?
1.
Rashi, Targum Yonasan: It is near my property, where I can damage.
2)
Why did he command to burn Yo'av's field?
1.
Malbim: Yo'av made it worse for him by taking him from Geshur, like he said below (verse 32).
3)
Why is "Hatzisuha" written with a Vov after the Hei, but it is not pronounced?