1. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size.infectious agent, infective agent-an agent capable of producing infection. Translations.. pathogen-any disease-producing agent (especially a virus or bacterium or other microorganism). microorganism, micro-organism-any organism of microscopic size.
Spartacus Educational. Farm Tools. Moulboard Plough: A plough that produced a deep furrow and turned the earth after it had been cut by the coulter and share. The moulboard was the device for guiding the plough and turning the earth over. To get the right depth for the seed the plough has to both cut and turn the earth.
Secondary Tillage Implements. Different 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.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.