Category: Culture

MANURES: Manure-water as Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The smell is objectionable; a haphazard method of obtaining the proper materials and nutrients; may be advantageous as a supplemental feed and to increase the bacterial activity in the pot. F74-33 Read More

MERCURY VAPOR LAMPS: Used for Growing Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Fluorescent lamps are mercury of a kind,color-corrected efficiently for growing plants under them. A70-55 Read More

MICROCLIMATES: In Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Nearly every growing area has them; in most greenhouses there is a cooler level at the bottom and a warmer area at the top. ODA76(3)-6 Read More

MICROCLIMATES: Variability of Temperatures in a Small Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Use several thermometers in addition to a high-low type to check degrees; it is warmest at the top, cooler under bench; (generally); variations occur according to the distance from the heat vents i... 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

MOISTURE MONITORING METER: Description

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Does not require outside source of electric power; has conventional method of measuring; moisture touching a bimetallic tip of the probe determines the quantity of electricity transmitted to a mete... Read More

MONOBASIC POTASSIUM PHOSPHATE (KH2PO): As Additional Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For dendrobium-type nobiles, use at 1/2 tpg. every 2 weeks August to 15th Oct; prolific flowering, A70-50; absolutely worthless. OWD Read More

MONOPOTASSIUM PHOSPHATE: As Fertilizer on Paphiopedilums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Two feeds of it at 5ml. per gal. water will restore hardness to leaves if a 30-10-10 fertilizer has been used, causing softening, instead of the preferred 20-20-20. OR77-264 Read More

MONOPOTASSIUM PHOSPHATE: Potash

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Suggested it be used at 1 tpg. as fertilizer applied to Dendrobium densiflorum from September on to ripen the growth and form buds in a cool atmosphere with good light. OR78-120 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