Category: Culture

BLUE METAL: Ingredient in Potting Mixes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Used in Australia, described as an essential part of a mix: 4pts. bark to lpt. blue metal (not otherwise identified, presumably an aggregate); to each four gallons of mix add three gallons of water... Read More

BOTTOM HEAT: Under Seedlings

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Fine plastic tubes through which warm water circulates are arranged under the growing area and connected to the water heater; temperature is thermostatically controlled with a probe buried in the b... Read More

CALCIUM: Deficiency

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Black areas appear on cattleyas during hot weather but they are not likely caused by sunburn although the symptoms are similar; deficiency symptoms are most prevalent when cattleyas are in active g... Read More

CALCIUM: Supplying a Necessary Element

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Calcium hydroxide is the most suitable source, at 50 to 200 ppm., or one gram of Hydrated lime to 10 litres of water, or 2.25 grams per 5 gallons of water; refer to AU84-97 Read More

CHANG MEDIUM: Formula

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 6ml. Atlas Fish emulsion; 2gr. Peptone, 20gr. Sucrose; 1000 ml distilled water; Agar 12 gr.; for this and many other culture or flasking media refer to OBII-243 Read More

CHARCOAL: Additive to Potting Mixes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It does not "contain" much of anything except Cftrbon, it is used to "buffer" the compost to stop buildup of fertilizer or excess salts; the right type from a charcoal kiln must be used, whatever t... Read More

CHARCOAL: In Culture Media

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Has a positive effect on the growth of cymbidium plantlets in the flask, also phalaenopsis and paphiopedilums because it seems to improve aeration. A84-258It seems to improve aeration; for other de... Read More

CHARCOAL: Graded Hardwood Type

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Is available in four grades; advt. A84-1084 Read More

CHARCOAL: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Because cellulose and lignin have been burned out in its manufacture it will last much longer than bark; suitable fertilizers are 18-18-18 or 20-20-20 at Itpg. A82-487Current use in U.S.A.; needs t... Read More

CHARCOAL: Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Oak charcoal with a pH of 6.5 to 7.5 has the least effect on the pH of the mix; adsorbs cyclic organic compounds; is safe for plants but its main advantage is physical support. A81-1311 Read More