Category: Orchid Doctor

GREENHOUSES: Indoor Urban Novelty

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Area size 20 by 30 ft. on the 12th floor of a New York City building; painting and sealing the apartment with epoxy paint and plastics, use of fiberglas, fertilizer proportioner, humidifier, four l... Read More

GREENHOUSES: Insulation Air-space

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Ideally, the space between outer and inner layers of a greenhouse cover should be approximately 1.5 inches thick, but spaces of three-quarters to eight inches are used; below three-quarters inch th... Read More

GREENHOUSES: Maintenance and Safety Precautions

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Never work on the roof alone; never use white lead dissolved in gasoline for shading; never use gasoline when painting; cymbidium leaf-tips have inflicted many an eye-injury so wear protective gogg... Read More

GREENHOUSES: Most Efficient Use of Sun's Radiation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The Ritelite planthouse; has its glass surfaces opposed to the surface of the atmosphere; are fixed in "normal" position in mid and higher latitudes to approximate tropic light values; refer to OA7... Read More

GREENHOUSES: Plans to Build

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A publication is usually available from your government college of agriculture which recommends plans. A72-412 Read More

GREENHOUSES: Plastic Lining for Insulation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The most economical film is two-mil polyethylene which produces a slight shading effect. A65-52 Read More

GREENHOUSES: Plastic Linings for Insulation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Still air is the best insulation, to achieve it use plastic linings of polyethylene about 2in. away from the inside of the roof; it is efficient; plastic bubbles material one inch size between two ... Read More

GREENHOUSES: Plastics and Their Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Plastic greenhouses can be heated as satisfactorily as glass ones; crops are of equal quality; construction costs per square foot are about one-sixth; in some areas they are assessed as temporary s... Read More

GREENHOUSES: Preferred Covering

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Glass allows for a maximum of light or of shading; next comes clear fiberglass; for a strong sun area opaline or a frosted fiberglass may be best. A72-1100 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More