30 BULLETIN 1306, U. S. DEPABTMENT OP AGRICULTUEE 
Fair yields of T\"inter wheat may be expected on fallow even in the 
dry years. 
The yields of spring grains are more certain on fallow than fol- 
lowing small grain or com, but the increases are not as large as with 
winter wheat. 
Fallow plowed about the time of plowing for corn produced higher 
yields than plowing either later or in the previous fall. 
The application of barnyard manure did not increase yields notice- 
ably. The use of a green manure is entirely unjustifiable, as it in- 
creases the expense without increasing the yield. 
Kharkof was the highest yielding winter wheat tested. No varietj^ 
.of spring wheat outyielded Marquis sufficiently to warrant replac- 
ing that variety. Kota yielded better than Marquis in 1921, 1922, 
and 192S, but has not been grown long enough to establish its value 
for general use in this section. 
The early oats of the Sixty-Day type yielded best in dry years, 
whereas the later or midseason varieties were best in other years* 
Trebi, a 6-rowed variety, was the highest yielding barley tested. 
Northwestern and Payne White, early varieties of dent corn, ma- 
tured fully ripe corn each year except in 1919, when the drought 
was so severe that none of the varieties made a crop. Later varie- 
ties, such as Minnesota No. 13, produced larger yields of fodder but 
often failed to mature. Early varieties of flint corn produce well 
and are valuable for hogging off. 
Seeding winter wheat late in September or early in October at 
about 1 bushel per acre gave the best results. The best yields of 
spring grain were secured by seeding in April at the rate of about 
4 pecks per acre or even slightly less. 
Sorgo was the highest yielding forage crop. The effect of sorgo on 
succeeding grain crops has not been fully determined. 
Alfalfa, millet, and Sudan grass were gro\^Ti successfully. Seed- 
ing alfalfa and Sudan grass with the grain drill gave fully as good 
results as seeding in rows. 
Field peas did not yield hekvily enough to make this crop a suc- 
cessful one. 
