. Bulletin. WHEAT, OATS, AND BAELEY IN SOUTH DAKOTA. 3 maturing varieties as well as early or late seeding. The whole ques- tion depends upon the time of occurrence of the hot wind or the high evaporation. Thus, some seasons are favorable to early-maturing and some to late-maturing kinds. A 10-year average shows little differ- ence between the yields of good early and good late varieties. The hot winds have sometimes occurred during the last week in June, in- juring early varieties, while in other seasons they have occurred dur- ing the last half of July, thus injuring the late varieties. Only
. Bulletin. WHEAT, OATS, AND BAELEY IN SOUTH DAKOTA. 3 maturing varieties as well as early or late seeding. The whole ques- tion depends upon the time of occurrence of the hot wind or the high evaporation. Thus, some seasons are favorable to early-maturing and some to late-maturing kinds. A 10-year average shows little differ- ence between the yields of good early and good late varieties. The hot winds have sometimes occurred during the last week in June, in- juring early varieties, while in other seasons they have occurred dur- ing the last half of July, thus injuring the late varieties. Only once during the 10-year period (in 1911) have they been so serious as to totally destroy the cereal crops at the western £o'g== LeSSTHAH/5/s/. /STOSOM. 20 TO 25M. MOfi£ THAN 25M. Fig. 1.—Map of South Dakota, showing the average annual precipitation in inches and the location of the agricultural experiment station and substations. The monthly, seasonal, and annual rainfall by years at the stations at Brookings, Highmore, Eureka, and Cottonwood, S. Dak., are shown in Table I, with averages for the periods for which records are reported and a summary of these averages. Table I shows that the average seasonal rainfall at Brookings for the five months from April 1 to August 31 is inches, or 68 per cent of the annual precipitation. June has been the month of great- est rainfall, with May ranking next in order. There have been two seasons when drought conditions occurred, 1904 and 1910; 1908 was the year of greatest rainfall. In 1903 the cereal crops at Brookings were destroyed by hail, a fact not shown in Table I. In brief, there have been seven good and three poor crop years in the 10-year period from 1903 to Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Office of
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