12 Farmers' Bulletin 1126.

yield in 8 out of 10 casos. The average increase attributed to the fertilizer was 68 per cent.

DATE OF SEEDING. It has been found best to seed Sudan grass after the soil has become warm, or about two weeks after corn-planting time. When sown in cold soil the result usually is a poor stand or a slow growth for several months, so that in the end no advantage has accrued from the early seeding.

Widely scattered experiments have shown that in very few cases are the earliest seedings highest in hay yield. The experience so far gained by the United States Department of Agriculture in its tests indicates that for the extreme South the best time for seeding lies ■J'- Vk FlQ. fl.—A close-up view oía field of Sudan grass seeded with a grain driil on June 1.

12,1915, at Hays, Kans. Photographed August between April 1 and May 1 ; in the latitude of Oklahoma and Kansas, anytime between May 1 and June 15 (fig. 6); and in the latitude of Nebraska and South Dakota between May 15 and June 15. From Kansas south good crops of hay can be secured from seedings made July 1 or even later.

METHOD OF SEEDING.

For hay production in regions of abundant rainfall the best machine for seeding is no doubt the common grain drill. Well-cleaned seed feeds freely from this drill, and it can be distributed evenly and a good stand thus secured. If a press drill is used the ground is left level and in good condition for the mower. The depth of seeding has but little effect on the root system of Sudan grass. It seems to be a characteristic of the grass that the root system begins near the surface