SECTION XIII. TERRACING AND DRAINING 



AFTER a heavy rainfall the water in the ditches a.id the 

 furrows is muddy. This mud is soil the best kind of 

 soil, too that the currents of water have washed away. 



FIG. 48. A FIELD RUINED BY WASHES 



The heavy rains not only bear away the fine particles of 

 soil, but in low places where much water collects and 

 where the little currents are strong, grains of sand and 



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