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MISC. PUBLICATION 6 5 6, U. S. DEPT. OF AGRICULTURE 



6. Completing the system : The guide rows are the only crop rows 

 that are staked out. After these have been correctly located, the rows 

 in the remainder of the interval, both above and below the guide, are 

 marked off parallel to the guide row (fig. 18). 



On moderate slopes and, with well-built terraces, point rows begin- 

 ning on the upper side of the terrace interval may extend over the 

 terrace ridge, thus using the channel as a turn row. Care should be 

 exercised, however, in cultivating across the terrace ridge so that the 

 channel capacity is maintained. 



On steeper land or with smaller terraces the crop rows should not 

 cross the terrace ridge but should end just below the ridge. Three or 

 more rows may then be run lengthwise the terrace ridge, if desired. 

 In this case a narrow turn row may be left below these rows. 



This system of row lay-out appears to be adapted to any sloping, 

 terraced fields of moderate uniformity where frequent breaks or field 

 irregularities do not interfere. It is especially suited to bright to- 

 bacco and other row-crop fields where free drainage is necessary 

 (fig. 19). 



The row system just described was first used in the Soil Conserva- 

 tion Service demonstration project area near Danville, Va., beginning 

 in 1937. Following these first trials it has been used on numerous 

 tobacco farms as well as at the Soil Conservation Experiment Station 

 near Ealeigh, X. C. Surveys have been made to determine the result - 





Figure 11). — A well-planned tobacco field in southern Maryland, which includes 

 terraces, grassed terrace outlets, and ridged rows. The guide rows in this 

 field were located by the string method to give effective erosion control and 

 adequate drainage. 



