Category: Culture

LIGHT, NATURAL: Transmission Through Plastic Films and Fiberglass Panels

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Data on 12 different greenhouse coverings; refer to A64-639+ see also Days,Short; Foot-candles reading; Photoperiodism; Phototropism; Reflective materials Read More

LIGHTS, ELECTRIC: At Night and Their Effect on Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Lighting for 24 hours stimulates some seedlings; it has no advantageous effect on mature plants; most species flower best under short days, from 12 to 14 hours of light and are inhibited by 16 hour... Read More

LIGHTS, ELECTRIC: Fluorescent and Incandescent Used to Induce Flowering

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Long hours per day, from 15 to 18, especially added to incandescent light, will inhibit flowering. A66-914; A73-503 Read More

LIGHTS, ELECTRIC: In Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Two systems are treated, one as in an enclosed room area and the other as supplemental lighting in a greenhouse; analysis of sunlight and of various lamps given; photosynthesis sensitivity curve pr... Read More

CARBON DIOXIDE: Percentages of Composition

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago In air it is about three hundredths of one percent; plants can use greater amounts to approximately 0.5 to 1%; data not related to orchids. OR72-34 Read More

LIGHTS, ELECTRIC: Longer Duration as Compensation for Low Intensity

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For most plants this is so, but in some cases high energy for a short period is essential for the plant. OR78-318 Read More

LIGHTS, ELECTRIC: Stimulation of Flowering by Means of Incandescent Lamps

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Both fluorescent and incandescent lamps stimulate growth and flowering; per unit of electrical energy more growth is produced by Gro-Lux. A73-503 Read More

LIGHTS, ELECTRIC: Supplementary in Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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 over 7 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

FERTILIZERS: 30-10-10 with Soil Acidifiers and Chelated Iron

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A suitable fertilizer, use 1/2 tpg. at every watering but let 10% of the liquid run out of the pot for leaching action. A74-114 Read More