Category: Culture

BLUE METAL: Ingredient in Potting Mixes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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 10 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