Naturalised Annual Clovers

Question 1

Where was Glenfalloch Station?

Answer 1

Uppe Rakaia River Mt Arrowsmith

Question 2

Where was Mt Grand Station?

Answer 2

Lake Hawea, Central Otago

Question 3

Define Naturalied

Answer 3

species which has come to a place from elsewhere but has been able to maintain viable populations without human management

Question 4

Describe the annual clover life cycle

Answer 4

germinate from seed in Autumn, grow a little over winter, grow alot in spring, flower, set seed and die.

Question 5

Under what rainfall does White clover fail at?

Answer 5

under 800mm.

Question 6

Name the 4 common species of naturalised annual clovers

Answer 6

cluster clover, haresfoot clover, striated clover, suckling clover

Question 7

What is the scientific name for cluster clover?

Answer 7

trifolium glomeratum

Question 8

What is the scientific name for Haresfoot clover?

Answer 8

trfolium arvense

Question 9

What is the scientific name for striated clover?

Answer 9

trifolium striatum

Question 10

What is the scientific name for suckling clover?

Answer 10

Trifolium dubium

Question 11

What is the visual description of Cluster clover?

Answer 11

Looks like a mini white clover. globular shape

Question 12

What is the visual description of Haresfoot Clover?

Answer 12

Condensed tannins, soft flowerhead, hair leaves

Question 13

What is the visual description of striated clover?

Answer 13

streaks in the stipules and stems, appears like sub clover when young

Question 14

What is the visual description of suckling clover?

Answer 14

small with distinctive yellow flowers, early flowering, grows quick and hard.

Question 15

What is the average rainfall for Glenfalloch?

Answer 15

1665mm

Question 16

What is the average rainfall for Mt Grand?

Answer 16

710mm

Question 17

What were the differing % of perennial grasses at Glenfalloch and Mt Grand?

Answer 17

50% in GF and 26% Mt Grand

Question 18

What was the change in % of legume species from Glenfalloch and Mt Grand?

Answer 18

> 30% at Mt Grand, less than 9% at GF

Question 19

What was the different % of naturalised annual clovers at GF and Mt Grand?

Answer 19

2% GF and 30% MG

Question 20

What were the differing % of Striated clover on different aspects at Mt Grand?

Answer 20

Moderate sun 20% Full sun 30% Shady less than 5%

Question 21

What was the effect of Olsen P from less than 10 to 15-20 on Striated clover ground cover?

Answer 21

Less than 10 = 37.5%
10-15 = 16.8%
15-20 = 6.6%

Question 22

How did the seedlings for Suckling clover increase from Year 1 to Year 2 in Low fertility

Answer 22

400/m2 in Year 1 to 1500/m2 in Year 2

Question 23

How did the seedlings for suckling clover increase from Year 1 to Year 2 in high fertility?

Answer 23

300/m2 in Y1 to 600/m2 in Y2

Question 24

How did the seedlings/m2 in striated clover differ in high and Low fertility levels in the second year?

Answer 24

1400/m2 in LF and 750/m2 in HF.

Question 25

Why was there more seedlings growing in the lower fertility plots?

Answer 25

Lower fertility>less grass feed available to animals> overgrazing > bare ground creation.

Question 26

What was the driving factor for dry matter production, seed set and recruitment of Naturalised clover?

Answer 26

Rainfall

Question 27

What was the effect of grazing management on the annual naturalised clover?

Answer 27

No effect

Question 28

What is the dominant annual clover species at Mt Grand Station?

Answer 28

Striated clover

Question 29

Describe the general response of NAC’s to soil P levels

Answer 29

The responses are very high at Low levels of P and then plateau quickly. The species requirements are different but all are more responsive at lower rates of P.

Question 30

At what pH level did the greatest yields occur ?

Answer 30

5.2-5.48

Question 31

Why did the yield decrease as pH increased?

Answer 31

pH induced reduction of P, B and Cu availability to the plant

Question 32

What influenced the relative grazing preferences of Merino Sheep?

Answer 32

Flowering Date

Question 33

What species was the least preferred by grazing merino sheep and why?

Answer 33

Suckling Clover, Early Flowering

Question 34

What species was the most preferred by grazing merino sheep and why?

Answer 34

Haresfoot clover. latest flowering

Question 35

Why does grazing preference value drop closer to maturity/flowering?

Answer 35

ecological mechanism to survive. Don’t want anything to eat seed as soon as it goes reproductive so makes itself less palatable to increase the chance of seeds surviving and becoming viable so they can get spread in the dung.