50 



ARID AGRICULTURE. 



a sort of cut and cover plowing which will riot 

 give the best crops. 



No one form of moldboard plow can be rec- 

 ommended for all soils. Where the soil contains 

 much clay or gypsum and lime, we have found 

 the steel moldboard will scour better than, a 

 chilled plow. We believe in using a plow with 

 a steel moldboard and with interchangeable lays. 

 The use of cast shares have some advantages. On 

 hard soils they are cheaper. The old share when 

 worn out is thrown away and the new one put on 

 always leaves the plow full width. Every time a 

 steel lay is sharpened it gets smaller, so a four- 

 teen inch plow does not remain fourteen inches. 



Plate IV. Plowing Dry Sod Seven Inches Deep. 



