Getting the harvest in

I actually blipped this field on 27th apr when they had  recently been planted.So it has taken approx 2 months to produce.I am fairly sure they are letttuces.  These men have been living on site and they have been extensively watered. They have been at it for 3 days and they are about 1/2 way through the field. I presume this is profitable but it does seem to have been a lot of hard work!