22 BULLETIN 402, U. S. DEPARTMENT OF AGRICULTURE. 
Table XIV shows the average dates when the varieties were fully 
headed and ripe, the length of time from sowing to maturity and 
from heading to maturity, the average height at maturity, the yield 
per acre, and the weight per bushel. 
The data in Table XIV show that three varieties of durum wheat 
have averaged at least 61 pounds per bushel. None of the common 
wheats has averaged more than 57.8 pounds per bushel. The durum 
varieties have longer straw, which is valuable on account of the diffi- 
culty in harvesting grain with short straw. The weather conditions 
usually force a rapid maturity of all varieties. The result is that the 
time from sowing to maturity is very uniform. It may be noted 
that Arnautka, which matures two days later than Kubanka, is 
recorded as requiring the same number of days from sowing to 
maturity. The explanation is that the date of sowing was not the 
same. 
NURSERY EXPERIMENTS. 
About fifty varieties and several hundred selections of spring 
wheat have been grown in nursery rows. The object has been to 
test varieties of unknown value and selections or strains in short 
nursery rows before giving them space in field plats. If they did 
not show promise, they were discarded. Some promising selections 
have been increased for testing in field plats. One of the best of 
these is Arnautka 6P1, which has been referred to in the discussion 
of field-plat experiments. Several selections which yielded well in 
nursery rows failed to outyield the mother variety when grown in 
field plats and so have been discarded. 
RATE-OF-SEEDING EXPERIMENTS. 
Rate-of-seeding tests, including four different rates, have been 
conducted at Akron for five years with durum wheat. Table XV 
gives the yield data obtained, which show a great lack of consistency. 
It will be noted that the general trend of increase in 1911 and 1913 
was from the lower to the higher rates. These were dry years, 
when agricultural experience would have favored the reverse order. 
In 1912, with more abundant moisture, there is a decrease from 41 
bushels for the low rate to 27 bushels for the high rate. This, 
again, is contrary to common belief. In 1914, with a fair rainfall, 
the order is normal, as gauged by common opinion. In 1915 the 
yields from the 2-peck rate and from the 6-peck rate are practically 
the same, and there is very little difference in the yields from all 
rates. The greatest departure was 0.7 bushel per acre. Under 
these conditions the average for the five years can not carry much 
weight. The average for the 2-peck rate is 21.2 bushels, and that 
for the 5-peckrateis thesame. The data seem to indicate that within 
certain limits the rate does not materially affect the yield. 
