Category: Orchid Doctor

LIGHTS, ELECTRIC: Supplementary in Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If lamps are turned on until 11:00 P.M. in a greenhouse they will interfere with the normal photoperiod; therefore they are wasteful. A77-209Use of fluorescents or incandescents is of little or no ... Read More

LIGHTS, ELECTRIC: Their Percentage of Sunlight Delivered

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An International Colour Rendering Index exists; it provides a standard against which spectral composition can be measured; Tru-Lite tubes, for instance, measure 91% of sunlight. OR77-340 Read More

LIGHTS, ELECTRIC: Use of Green, Red or Yellow Bulbs in a Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The night-time use in a greenhouse of an ordinary light bulb for working purposes will not bother the plants. A81-526 Read More

LIGHTS, ELECTRIC: Vho Lighting System and Its Life Expectancy

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 800 milliamp VHO tubes are rated at 12,00 hours, about 2.5 years; 1,500 milliamp rating is 9,000 hours, less than two years. A74-708 Read More

LIGHTS, ELECTRIC: Viewing Orchid Flowers Under

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For judging or plain appreciating of flower quality with close-to-natural lighting for color rendition, a 5000-Kelvin color fluorescent called the Chroma 50 by GE is recommended. AA80-100 Read More

LIGHTS, GROWING UNDER: Arctic Set-up

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The north tip of Baffin Land has darkness from October to March; fluorescent lights were rigged up on a three-tier frame and a wide variety of genera were grown with success; for much detail refer ... Read More

LIGHTS, GROWING UNDER: Automation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Controls for watering, lighting, ventilation, etc. described and illustrated, refer to A86-704 Read More

LIGHTS, GROWING UNDER: Basic Culture

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A review of requirements and conditions for successful culture; "low-light" category of plants are most adaptable; suitable species mentioned. A81-421; 536; A86-595 Read More

LIGHTS, GROWING UNDER: Basic Culture Under Lights

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A review of requirements and conditions; "low-light" category of plants are most successful; a list of suitable species provided; refer to A75-792+ 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