670 



IOWA DEPARTMENT OP AGRICULTURE 



w/5co/^5/n DRirr rrm ^ourtiCRfi /owa io£35 ^^ m/ss/ss/pp/ 10^55 ESSi 

 /oyv/i DR/rr ^HTm Missouri loes5 Esza moraine mm 



^^J^9\-l0O7c successful. Ill 91-100% port/afli/ 50-63% failure, 



successful or- better-. 



*^7i-eo',.ucce^ru, ':XXC;C7.?.. ooro-ee.,r.>,ure. 



I 6l-T0%partlallLj 

 * 61-70 % successful. successful ort^etter. 000 90-100 % failure. 



Fig-. 12.— Map showing- success with alfalfa on the different soil areas 

 of Iowa. 



TABLE X. 



The Per ICent of Seedings Reported as Successful, Partially Successful, and Failures, on 



the Various Soil Areas. 



CO OPERATIVE EXPERIMENTS OVER THE STATE. 



To determine what treatments are necessary to bring success on dif- 

 ferent soils, a number of co-operative alfalfa fields were located in the 

 summers of 1910 and 1911. On some of these, alfalfa was seeded in the 

 fall of 1910, and upon others in the spring or fall of 1911. 



