Category: Culture

UREA: Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A good cheap source of nitrogen ; it does not readily combine with other elements to produce salts nor does excessive amounts cause too much damage to the plants. OR80-185 Read More

VENTILATION: Exhausting Hot Air From the Greenhouse Peak

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Install a turbine generator as high as possible with a small fan under it blowing straight up; refer to A83-52 Read More

VENTILATION: Size of the Vents

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They should be at least 10% of the roof area as a minimum. RMH Read More

VENTILATION: With Solar Energy

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A solar chimney draws air vertically out of the greenhouse without machinery; build a flue out of three/eighths inch exterior plywood; for diagram, materials, method of operation; refer to OD88-30 Read More

VENTILATORS: Non Electric

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Self-automated ventilator units are moved by a heat-expandible mechanism, they need no electricity and are useful in case of electricity failure; some growers use them only. Ca85(l)-10 Read More

VITAMIN B: Sources

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A Stress Tab (B complex vitamin) can be dissolved in one gallon of water; or Superthrive can be used. OIE85Sept-6 Read More

VITAMINS: As Additive in Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Circumstances make the rules invalid; test before making large applications; some other less pertinent suggestions made. F85-8 Read More

VITAMINS: As Plant Growth Substances

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A brief review of some, such as thiamine, niacin, biotin, ascorbic acid, yeast; refer to OA83-52; refer also to OBIII-201; OBII-269, etc. Read More

WALNUT SHELLS: The Hulls as Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is used as an additive or a replacement for perlite or bark and it has been suitable by some growers. OA82-8 Read More

WALNUT SHELLS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is now available commercially in two sizes; refer to A85-516 Read More