PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE (devices for topping or skinning onions or flower bulbs Fulltext... Hierarchy... Expanded...A23N 15/08)
The plant growth regulators are those materials which alter the plant through a chemical modification of the plant metabolism, such as auxins. Materials which affect the growth of a plant solely by supplying nutrients, i.e. plant food, ordinarily required for growth are provided for in class Fulltext... Hierarchy... Expanded...C05 as are materials which are used to prevent or cure mineral deficiencies in plants, e.g. addition of iron chelates to cure iron chlorosis. [3]