THE DRY FARMING CONGRESS. 



of these practices should be followed. We will not, however, discuss 

 them at the present time. 



Soil Treatment. 



"When we come to examine the results obtained at individual sta- 

 tions, we find much more marked differences in the yields ottained 

 in different crop sequences and after different times of plowing. We 

 also find that the same crop sequence and same time of plowing often 

 produce exactly opposite effects at different stations. For instance, 

 take the two stations at Dickinson, North Dakota, and Amarillo, Texas. 

 Crop Rotation. 



"It will be noticed that oats after wheat gave 12.8 bushels more 

 yield after spring plowing than after fall plowing at Dickinson, while at 

 Amarillo the yield from fall plowing was 3.3 bushels greater than for 

 spring plowing. Much the same difference is noted upon the continuous 

 cropping of wheat, the yields being much higher on the spring plowed 

 land at Dickinson than on the fall plowed land, while at Amarillo the 

 difference is in exactly the opposite direction. No crops of oats were 

 raised upon corn land fall plowed, but the corn land spring plowed at 

 Dick'nson, gave relatively high yields. 55.8 bushels, while oats upon fall 

 ^owed corn land at Amarillo gave 21.9 bushels. It might be noted in 

 this connection that the yields obtained at both of these stations are 

 very nearly the same for continuous cropping with oats, the fall plowed 

 land being 32.2 bushels in one case and 32.3 bushels in the other. The yield 

 of oats on disked corn land at Dickinson was high, being 64.7 bushels, 

 while at Amarillo it was 23.1 bushels. The yield at Dickinson on summer 

 fallowed land was 57.7 bushels, being 7 bushels less than upon d'sked 

 corn land, while at Amarillo it was 32.5 bushels, being 9.4 bushels great- 

 er than upon disked corn land. At Dickinson the yield upon land having 

 had rye plowed under for green manure was two bushels greater than upon 

 fallowed land. While at Amarillo it was six bushels less than upon fal- 

 lowed land. Peas being plowed under gave 10.3 bushels less than rye 

 plowed under at Dickinson and at Amarillo 4.4 bushels less. At Dick- 

 inson the land having had sweet clover plowed under for green manure 

 gave the highest average yield obtained at any station, 65.3 bushels. No 

 oats were grown at Amarillo on land having had clover plowed under. 

 The yield of oats following barley on fall plowed land was 44.7 bushels 

 at Dickinson and 24.2 bushels at Amarillo. Oats after flax was nov 

 raised at Amarillo but at Dickinson it gave a yield of 30 bushels, which 

 v/as 2.3 bushels less than was obtained by continuous cropping to oats. 



"We will not attempt to trace the other results through. An exam- 

 ination of the chart will reveal that the effect produced upon the yields 

 by the different crop sequences and times of plowing at North Platte, 

 coinside fairly well with those at Amarillo. The effect from 

 different crop sequences and times of plowing produced at 

 H^'ghmore correspond more closely to the average yields obtained for 

 all of the stations. The results at Edgeley also coinside fairly well with 

 the average, with the principal exception that the yield of oats after 



