The formula and rate of applying fertilizer should be as follows:
A.4.4.3 Flowering
stage (1) Dendrobium uses leaf formula fertilizer of 21-21-21
alternate with 16-21-27 formula or 15-30-15 formula with ratio of 600 to 800 grams to 200 liters of water per Raid every seven days, and Moccara, Aranda and Vanda: grooved leaf uses ratio of 500 to 700 grams to 200 liters of water per Rai every seven days and to help reducing falling of budding flower in orchid of Dendrobium during change of season fertilizer of formula 16-21-27 should be given at ratio of 800 to 1,000 grams to 200 liters of water per Rai for number of once to twice.
(2) Oncidium uses leaf formula fertilizer of 21-21-21 alternate with formula 16-21-27 with ratio of 400 to 600 grams to 200 liters of water per Rai or formula 7-24-34 with ratio of 300 to 500 gram to 200 liters of water per Rai every seven day.
A.4.4.4 Harvesting
stage (1) Dendrobium uses leaf formula fertilizer of 15-30-15 alternate with 16-21-27 formula with ratio of 500 to 700 grams to 200 liters of water per Raid every seven days, and Moccara, Aranda and Vanda: grooved leaf uses ratio of 400 to 600 grams to 200 liters of water per Rai every seven days.
(2) Oncidium uses leaf formula fertilizer of 16-21-27 alternate with formula 7-24-34 with ratio of 300 to 500 grams to 200 liters of water per Rai every seven days. A.4.5 Tools and equipment being used prior to harvesting are sufficiently available and suitable for the operation and stored separately, securely and easily accessible. The list of tools and equipment should be provided and kept including available maintenance plan and record. The working condition of tools and equipment e.g. chemical spraying units, harvesting gears, agricultural tools should be regularly checked before use. Equipment requiring precision in the operation e.g. agricultural pesticide spraying nozzles shall be regularly calibrated. If any deviation is found, the equipment shall be repaired or replaced so as to maintain its function of operation up to the required standard. Provide cleaning before and after operations to the tools and equipment including containers for collecting and transferring cut flower orchid prior to keeping in storage.