HORT 3503 Lecture Notes - Lecture 20: Spinach, Summer Squash, Solanaceae
Document Summary
Topic 20: sustainable and organic season extension with tunnels. No forced temperature modification: no heater or cooling system; no forced air; passive temperature controls. Temporary: the covering may be seasonal; the structure may be moved around a farm; many are semi- permanent, but no permanent structures inside you can move crops around within the structure. Passively heated solar heated: may have supplemental heat for some crops; may have additional solar heat (cid:272)olle(cid:272)tors; (cid:373)a(cid:455) ha(cid:448)e (cid:858)(cid:271)la(cid:374)kets(cid:859) to trap heat. Supplemental heating may be added: biomass burners; unit heaters. Passively cooled: roll-up sides, end wall eve-vents, open doors, open the roof; misting for evaporative cooling. Row covers in the field to advance the crop and protect from frosts, picture. Purpose of row cover tunnels: advance the crop; protect the crop (frost/pest) Low tunnels less than 6 ft tall; temporary, seasonal; purposes (forcing plants; extending the season; pest protection)
