6. Rice 2/2

Question 1

Australian brown rice uses how much water compared to the average?

Answer 1

50% less water

Question 2

Close to 1t of rice is produced per ____ in _____

Answer 2

megalitre of water, Australia

Question 3

Soil moisture requirements at stage: seed

Answer 3

Best practice is dry sowing prior to rainfall. Seed must germinate with moisture.

Question 4

Soil moisture requirements at stage: emergence to 4 leaf

Answer 4

Low moisture

Question 5

Soil moisture requirements at stage: 4 leaf to mid tiller

Answer 5

Moderate moisture requirement

Question 6

Soil moisture requirements at stage:
Mid tiller to PI

Answer 6

Moderate moisture

Question 7

Soil moisture requirements at stage: PI to maturity

Answer 7

Saturated profile

Question 8

PI definition

Answer 8

Panicle Initiation - beginning of the reproductive stage of rice development.
Panicle - inflorescence of a rice plant

Question 9

80% of required N to be applied into soil when and how?

Answer 9

Drilled into the soil atleast 10cm deep. Prior to planting.

Question 10

Common weeds in rice fields (8)

Answer 10

• arrowhead
• barnyard grass
• silver top grass
• dirty Dora
• jerry jerry
• starfruit
• water plantain
• leaf miner

Question 11

Common pest insects

Answer 11

• bloodworm
• leaf miner
• snails

Question 12

Microspore soil moisture levels are critical because…

Answer 12

• deep water is a highly effective method to protect against cold damage

Question 13

Microspore formation occurs when

Answer 13

In the middle of the reproductive stage

Question 14

Durations of panicle to finish microspore and a whole field.

Answer 14

2-3 days
7 days for an entire field (differing growth stages).

Question 15

Rice water depth until flowering

Answer 15

Minimum of 25cm

Question 16

Rice cold damage over Microspore growth stage occurs below:

Answer 16

15-17 celcius

Question 17

To minimise stress prior to reproductive cycle, permanent water must be applied when?

Answer 17

No later than 10-14 days before panicle initiation (PI)

Question 18

When should rice be harvested

Answer 18

18-22 percent moisture, stems and leaves still green,

Question 19

Rice should be harvested between what moisture level?

Answer 19

18-22 percent moisture, stems and leaves still green.

Question 20

Paddy rice is

Answer 20

The entire rice whole grain. Bran, hull and white rice.

Question 21

17-20% of rice weight is in its

Answer 21

Hull

Question 22

10-13% of paddy rice weight is in its…

Answer 22

Bran

Question 23

White rice component of paddy rice is ___% of its weight

Answer 23

70%

Question 24

WGY stands for?

Answer 24

Whole grain yield

Question 25

What are brokens when referring to rice harvest?

Answer 25

Brokens are the hills and bran of the paddy rice.

Question 26

Rice is milled at what moisture percentage?

Answer 26

14%

Question 27

Stack burn and rice cracking is avoided by….

Answer 27

Only reducing moisture at a rate of 0.5 percent per hour and transporting the rice to a drying facility within 8 hrs of harvest.

Question 28

Inbred rice or pureline is….

Answer 28

Genetic makeup of progeny will be identical. Typically a perfect flower. Majority of rice crops are inbred

Question 29

Hybrid rice

Answer 29

Offspring of breeding between two rice varieties that are genetically unique from one another.

Question 30

Advantages of hybrid rice (3)

Answer 30

• increased yields
• enhanced vigor
• increased resistance to pest and disease

Question 31

Disadvantages of hybrid rice (2)

Answer 31

• seed price
• unable to save seed to re-seed. Must purchase anew every year

Question 32

Transgenic rice

Answer 32

Rice which Carrie’s foreign genes, by means of genetic engineering. Very few are available to farmers.

Question 33

GM Golden rice

Answer 33

Genetically engineered rice that produces pro-vitamin A. Quick fix for vitamin A deficiency occurring in some countries of the global south.

Question 34

Rice sowing rate on average?

Answer 34

120-140kg/ha

Question 35

Aerobic ‘DryRice’

Answer 35

Rice not subject to complete flooding.

Question 36

Crops after rice can mitigate

Answer 36

Rising water tables and salinisation of soil.