GLG 598/490 xxxSpring '00

Lessons Learned--BELOW the ground

• Little distances have big effects on water movement

• Increasing light levels will increase the strain on the root zone water delivery systems

• Capillary forces become dominant as gravitational forces decrease

• Properly managed porous substrate root zones can deliver hydroponic class results in µg.

• Root growth media (wetting characteristics, particle size, and pore size) must optimize availability of water and dissolved nutrients, and gases