Effects of reduced plant height on breeding requirements and ...

Stanberry and Lowrey (L965) reported that nitrogen
fertilized barley headed earlier than non-fertilized at
Yuma, hrizona. at the sane time indicating that these
results were opposite to those reported for the l,{id. -Vi¡e st
and Eastern U.S.A.. In spring wheat grown in Montana,
McNeal and Davis (1951+) reported a delay in heading due to
nitrogen in a wheat study.
In a barley quality study Reisenauer and Dickson (L961)
dernonstrated that d j-astatic power and alpha-amylase levels
increased with increasing nitrogen application in accordance
with a previous report (Atkins et al-. , 1955). fhey also
concluded that the best quality malting barley was produced
at low yíeld leve Is .
Row Spacine in Cereals
In an extensive review <strong>of</strong> research on the effect <strong>of</strong> row
width on cereal yield Hotliday (l-96]) concluded; 'rAt constant
seed rate, decreasing the row width below 7 to B inches
(t?,9 to 2o,) cm, ) has, in most cases, l-ed to a small j-n-
crease in cereal yieId. This has been <strong>of</strong> the order <strong>of</strong> 5 to
|Fr, Conversely, increasing the row width aboie the standard.
has in most cases gíven some decrease in yield.rt He also
concluded, rrThere is evidence that the yield advantages <strong>of</strong>
narrow rows are more pronounced at seed rates both below and
above the normal. The fall.ing <strong>of</strong>f <strong>of</strong> yield at wide rows is
more pronounced at high seed rates."'. [he work Hotliday
reviewed was carried out with standard <strong>height</strong> material-.
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