28 



Instructions to Field Parties. 



Table showing percenimje of salt in soil. 



If more accurate work is to be done, or it is believed tbe above 

 limits do not lit tbe conditions, tbe work is to be standardized in 

 each district in tbe following way: Take eigbt or ten crusts, includ- 

 ing tbe top inch of soil, or if crusts can nt>t be obtained, take tbe 



