CAB129-37 — Page 398

Page 398

A late-planted (15th March) sunflower variety trial at Kongwa gave the follow- ing results:-

Table 26.-Results of Sunflower Variety Trial, Kongwa Experiment Station

1947-48

Seed Yield

Oil Content

Variety

lbs./acre

Per cent.

Total Oil, lbs./acre

17

±0.51

+8.4

Sunrise

136

29.0

40

Advance Hybrid

170

29.9

51

Pole Star

263

29.0

77

Hungarian

348

28.6

101

Mean

229

29.1

67

Four inches of rain fell in the nine days after the planting of this experiment, and the total growth period was 112 days. A potash treatment incorporated in this experiment was ineffective, as judged by eye. Pole Star and Hungarian are evidently superior to the Canadian varieties, under these dry late-planted conditions.

The oil content and oil yields of certain sunflower varieties at Kongwa in 1947-48 were as shown in Table 27:

Table 27.--Seed Yield, Oil Content and Oil Yield of Sunflowers on Observation

Plots, Kongwa, 1947-48

Seed Yield, Oil Content

lbs./acre

Variety

Southern Cross

Jupiter

Pole Star

Saturn

Black seeded giant

Grey seeded giant

Hungarian

Hungarian

Hungarian

Hungarian

Hungarian

Oil Yield,

Per cent.

lbs./acre

770

26.4

205

778

28.2

219

1,255

28.6

362

1,153

26.6

307

450

26.8

120

650

26.0

167

1,317

28.3

373

1.162

28.6

332

•

232

26.7

62

•

502

25.9

129

205

29.2

60

...

It is to be noted that the yield values are not mutually comparable, since they are not derived from experiments but from scattered and mostly unrelated observation plots.

Co-operative studies on free fatty acid content and other characteristics of sun-

flower oil

The free fatty acid (FFA) and iodine values of the oil from samples of sun- flower seed were examined by Professor T. P. Hilditch as part of an investiga- tion into the possible advantages of heat treatment of sunflower seed before shipment (see p. 116).

Four samples were sent, all of the Hungarian variety, from a harvest in late July, 1948. The treatments were:

No heat treatment, sent by air No heat treatment, sent by sea Heat treated, sent by air

$1

$2

S3

$4

Heat treated sent by sea

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