The physical condition of the surface soil. Good tilth requires plenty of organic material, good soil structure, and good porosity for air and water movement into and through the soil. Soils in good tilth are easy to work, easy for plant seedlings to emerge from and easy for plant roots to grow in.
Tilth is land which has been prepared for growing crops by plowing and fertilization. In discussions of composting and organic gardening, the phrase "the tilth of the soil" is often used to describe the general health of the soil including a balance of nutrients, water, and air.
Cultivated soil in good physical condition for supporting soil life. Soil is loose and easy to work, so tools as well as plant roots can readily dig in. The tilth of the soil is a composite of its texture, structure, aggregation, density, drainage, and water holding capacity.
The physical condition of soil, generally described in terms of its ease of tillage (workability), fitness as a seedbed, and its resistance to seedling emergence and root penetration. Soil tilth is closely related to soil structure, but structure is usually described in physical terms and tilth is usually evaluated in relation to a crop response or soil management operation.