• Square D is the middle south square in Mars Base Zero.
• Bounded on the west by square B, and separated from square B with a loose concrete block wall 3 blocks (2 feet) high..
• Bounded on the north by square C, and separated from square C with a loose concrete block wall 2 blocks (1.25 feet) high.  On top of this wall is a 2"x6" plank to make it easier to walk down, for this is the route used to access the back area of the structure.
• Bounded on the east by square F, and separated from square F with a loose concrete block wall 2 blocks (1.25 feet) high.
• Bounded on the south by the south wall, which during the summer is usually open, and during the winter is usually 1 layer of visqueen (plastic sheeting).
• Soil bed description, from the bottom up:
• Floor
• 2 layers visqueen (plastic sheeting)
• 3" sand
• 10" soil
• Size:
• 11' 9.5" (3.6 m) east/west by 11' 7" (3.5 m) north/south
• 135.6 square feet (12.6 square meters)

• This soil bed was first filling in the summer of 1999.
  
• 1999: It was planted in potatoes.
• 2000: fallow
• 2001: fallow
• 2002: Sketch of layout.  Photoes of potatoes.   Photo of the eastern 1/3, showing the walking plank.
  
• 2003: fallow
  
• 2004:  Potatoes.

• 1999: filled with soil from the origional garden area.  It is a little low in most things, but it has a good amount of organic stuff in it so it should provide adequate nutrients.
• 2000: fallow; lots of weeds (primarily lamb's quarters).
• 2001: ditto.
• 2002:  It was watered with Miracle Grow fertilizer about 2 times over the summer.
• 2003: fallow; lots of weeds (primarily lamb's quarters).
• 2004: Fertilized with 3 kg 8-32-16 on 5/22/04.  It was watered with Miracle Grow fertilizer (30 gallons) about 5 times over the summer.
  

Potential Future Plans:

• 2005 wheat or barley?
• It is getting very low on organics; the soil is no longer nice and fluffy.  Need to add in compost ASAP.