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

Site
Sanford 19?6 Clay
Cawnan 19?6 Fine Sandy
Loam
Portage a)f6 Fine Sandy
f-.,Oam
Soil !¡fpe Previous Crop
Flax
Rape seed
Sunflower s
36,o
24,?
34,8
All sites were fertilized prior to seeding.wÍth a
broadcast application <strong>of</strong> 11:48¡0 to attempt to achieve
recorunended Pro, levels. Planting dates were May lJ at
Carrnan and May 16 at Portage ín I9?5, I{ay I at Sanford,
May B at por-bage and May lp at Carman rn Lg?6. Growing
conditions were average except for a heavy weed infestation
at Carnan in I97 5 and severe moisture stress at both Carman
and Portage in 1976,
The five main plots were rates <strong>of</strong> nitrogen fertilizer;
applied as l4:0:O broadcast and harrowed in prior to <strong>plant</strong>ing,
at Levels <strong>of</strong> 0.00, 67,26, 134'-52, Z}I.?B ana 26g,o4
kilograrns <strong>of</strong> actual nitrogen per hectare. Sub-plots were
genotypes. Plots were four rows 6.1 meters long with 30 cm.
between rows and between plots. .4.11 plots were seeded at
noymal field seeding rates.
The following characteristies were measìlred for each
plot at each environrnent: (Unless oi;herwise specified,
rneasurements were iaken as ín Experiraent I.)
(r) Prant <strong>height</strong>
(e) yief¿ - recorded as kg,/ha.- Â four meter section
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