Salutary lesson: Wherever you go in this world, take your own tree, a pocketful of fertiliser and a copy of Jethro Tull's 1731 book Horse-Hoeing Husbandry, or an Essay on the Principles of Vegetation and Tillage.
Although the firm pioneered casual gaming on Facebook with hits such as "FarmVille", a virtual world of toil and tillage, many of its offerings have been losing their appeal on the social network.
Reducing tillage allows more residue to remain in the ground, sequestering more CO2 in the soil and reducing greenhouse gas emissions.
That tillage would release carbon dioxide and methane.
This should eliminate the need for tillage, thus reducing mechanical damage to the soil.
This means that farmers who prevent carbon emissions by, for example, planting trees or reducing tillage, would get carbon credits.
Many of the dispossessed took to the woods and subsisted by slash-and-burn tillage, while others emigrated to Manchuria and Japan in search of jobs; the majority of Korean residents now in those areas are their descendants.
Because many ultisol areas of the southern United States have been in row-crop tillage for several centuries, severe erosion has resulted, further limiting their productivity.
Because the amount of water available for plant growth is one of the major limiting factors in crop production, improved tillage and terracing practices have been devised to conserve soil moisture, and soil-management and land-use practices have been developed to increase the infiltration of snow, rain, and irrigation water, thereby reducing losses caused by runoff.
Thus, the farmer usually attempts tillage of such soils only after a slow rain has moistened the clods and made them friable.
When moisture is scarce and control of wind and water erosion necessary, tillage is sometimes carried out in such a way that crop residues are left on the surface.
