Newly Posted Articles

FOOD ELEMENTS: 14 Needed by Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The major elements are: nitrogen (N), phosphorous (P), and potash (K); from the air and water are derived: hydrogen, oxygen, carbon; the trace and minor elements are: sulfur, manganese, iron, zinc,... Read More

FOOT-CANDLES: Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The amount of light emitted by a burning candle one foot away; 500fc. is about enough to read a newspaper; a clear day in June (in Maine) would be 12,000. A86-814 Read More

FOOT-CANDLES READING: Using Photographic Equipment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use the meter on the camera; point latter at center of sizeable white surface without casting a shadow; set ASA at 10.3 and the shutter at 1/100 second and read: f/3.4 is 400fc.; f/4 is 500fc.; f4.... Read More

FOOT-CANDLES: Conversion Table

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Using a Weston light metre and a sheet of white matte cardboard, take exposure readings and rate them with foot-candles of light 16(6400), 15(3200), 14(1600), 13(800), 12(400), 11(200) etc. down to... Read More

FOOT-CANDLES: Fc Rating Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago One foot-candle equals the light emitted by one candle one foot away; expressed ratings are measured at noon Standard Time on a clear day; the maximum amount would be recorded around June 21 and th... Read More

FOOT-CANDLES: Optimums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For cattleyas the range is 2400 to 3600, for phalaenopsis it is 1500 to 1800. A86-815 Read More

FOOT-CANDLES: Outdoors, in Alberta

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago During the summer there are about ll,000fc.; during winter between 4,500 and 6,000fc. A60-770 Read More

CYMBIDIUMS: Blooms with Small Raised Bumps

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Probably caused by spider mites, plant lice or aphids; before the buds form control with malathion but add 1/2 teaspoon of liquid detergent to the spray. A78-812 Read More

WINDOW GROWING: Recommended Plants Listed

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Epidendrum tampense, Epi. difforme, Epiphronitis Veitchii, Paphiopedilum Maudiae 'Magnificum', Brassavola nodosa, Aspasia principissa, and Brapasia Serene. A74-517Smaller Slc. hybrids, Cattleya lut... Read More

SHEATHS: Blind

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On cattleyas are caused by insufficient light; hang them up close to the roof of the greenhouse. ODA72-134 Read More