Disease. Several different plant diseases lead to various parts of plants turning yellow, most commonly the leaves. Viral diseases such as yellow mosaic cause plant leaves or flowers to turn yellow. Some fungal diseases may also cause yellowing. Rust, for instance, might cause yellow powder to form on the leaves.isease. Several different plant diseases lead to various parts of plants turning yellow, most commonly the leaves. Viral diseases such as yellow mosaic cause plant leaves or flowers to turn yellow. Some fungal diseases may also cause yellowing. Rust, for instance, might cause yellow powder to form on the leaves.
â¢ PLOW (verb) The verb PLOW has 3 senses: 1. to break and turn over earth especially with a plow. 2. deal with verbally or in some form of artistic expression. 3. move in a way resembling that of a plow cutting into or going through the soil. Familiarity information: PLOW used as a verb is uncommon.
Implements used for opening and loosening of the soil are known as ploughs. Ploughs are used for primary tillage. Ploughs are of three types: wooden ploughs, iron or inversion ploughs and special purpose ploughs.ifferent types of implements like cultivators, harrows, planks and rollers are used for secondary tillage. Tractor Drawn Cultivator: Cultivator is an implement used for finer operations like breaking clods and working the soil to a fine tilth in the preparation of seedbed.