8 SUDAN GRASS. 



This jdeld is at the rate of 4.4 tons per acre. During this period 

 the rainfall was as follows: 



IiK-hos. 



April 26 to 30 1 0. OS 



May .52 



June 4.69 



July 1. 39 



August , 3. 35 



September 2. 92 



October 1 to 14 1.97 



Total 15.52 



Two acres were also planted on April 20 in rows 36 inches apart. 

 This crop grew to an average height of 6 feet 4 inches and was har- 

 vested for seed on August 3, 96 days after planting. It was a little 

 overripe and probably 10 per cent of the seed was lost by shattering. 

 The actual seed saved from the 2 acres was 708 pounds. By Septem- 

 ber 20 the grass was again about 18 inches high and beginning to 

 head, when it was cut for hay in order to plow the ground. The 

 yield was estimated at about 1,000 pounds per acre, but it was not 

 weighed, owing to rainy weather. 



Two fields of Sudan grass were grown for seed under contract 

 with two farmers in the immediate neighborhood of ChiUicothe. One 

 farmer planted 12 pounds of seed on 13 acres in 42-inch rows and 

 secured a yield of about 10 bushels per acre. The second farmer 

 planted 4 pounds of seed on 2 acres in 42-inch rows and harvested 

 1,285 pounds of clean seed, or 15.3 bushels per acre. 



The seed grown on the experiment farm weighed 40 pounds to the 

 bushel ; that grown by the first-mentioned farmer, 44 pounds, and by 

 the second, 42 pounds per bushel. In contrast the seed grown on the 

 experiment farm in 1911 weighed but 32 pounds per bushel. 



RESULTS OF TESTS AT ARLINGTON FARM. 



At Arlington Farm, Virginia, Sudan grass was tested in 1912, both 

 broadcasted and in 18-inch rows (figs. 2, 3, and 4). The broad- 

 casted plats were sown on June 3 at the rate of 10 pounds of seed to 

 the acre. The broadcasted stand was not perfect, some comparatively 

 sterile spots being almost bare of Sudan grass and occupied by 

 pigeon grass. The crop in these plats grew to an average height of 5 

 feet. One twentieth-acre plat cut for hay on August 23 yielded 280 

 pounds, or at the rate of 2.8 tons per acre. The second growth on this 

 plat was 30 inches high and was beginning to head on September 20. 

 This grew to a height of about 3 feet, but the seed was not nuiture 

 when killed by frost on November 4. Nine plats of one-twentieth of 

 an acre each were cut for seed on September 20 and yielded, on the 



[Cir. 125] 



