The World Book Encyclopedia, Tom 4World Book, 1994 - 666 An encyclopedia designed especially to meet the needs of elementary, junior high, and senior high school students. |
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Strona 804
... farmers simply cleared more land . The most skillful farmers were the German settlers , who rotated their crops and added fertilizers to the soil . These meth- ods kept their land highly productive . Tools . The colonial farmer worked ...
... farmers simply cleared more land . The most skillful farmers were the German settlers , who rotated their crops and added fertilizers to the soil . These meth- ods kept their land highly productive . Tools . The colonial farmer worked ...
Strona 977
... farmers till their fields three or more times a year . One form of minimum tillage is called zero - tillage or no - till . After harvesting a crop , farmers leave the residues ( remains ) from the crop on the field as a covering for the ...
... farmers till their fields three or more times a year . One form of minimum tillage is called zero - tillage or no - till . After harvesting a crop , farmers leave the residues ( remains ) from the crop on the field as a covering for the ...
Strona 1090
... farmers till the land mainly by ma- chine . In less industrialized countries , people or animals pull the plows . In areas with severe erosion or little top- soil , farmers do little or no tilling . Planting is done by machines in most ...
... farmers till the land mainly by ma- chine . In less industrialized countries , people or animals pull the plows . In areas with severe erosion or little top- soil , farmers do little or no tilling . Planting is done by machines in most ...
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