Maize 1/1

Question 1

Maize (Zea mays) is an annual plant member of the grass ___ family

Answer 1

Graminea or Poaceae

Question 2

First Maize plant theory (tripartite hypothesis)

Answer 2

maize was domesticated from an unknown wild, now extinct maize plant with features comparable to contemporary maize’s ear

Question 3

First Maize plant theory (catastrophic sexual transmutation Theory )

Answer 3

developed by a rapid sexual transformation that condensed the branches of teosinte and positioned them in the plant’s female expression region

Question 4

Tripsacum - Zea diploperennis hypothesis

Answer 4

History of Maize theory, as a modernised variant of the tripartite hypothesis, it suggested that maize evolved from the offspring of a cross between Z. Tripsacum and Diploperennis dactyloides

Question 5

It is likely that maize was introduced to Australia with the first fleet in what year?

Answer 5

1788

Question 6

What occured in 1947 to do with Maize crops?

Answer 6

The first commercial hybrid maize crops were produced based on US Corn Belt hybrid.

Question 7

first Australian-bred hybrids (GH96A and GH112A) were released in what year?

Answer 7

1948

Question 8

what is the first rust resistant maize cultivar in Australia?

Answer 8

QK37, 1961

Question 9

ratio of dryland and irrigated maize

Answer 9

50/50

Question 10

Producing a high-yielding grain harvest from irrigated maize in the Riverina area typically takes between ____ and ____ mm of irrigation water per ha

Answer 10

600mm and 1000mm (6 to 10 ML/ha)

Question 11

amount of water needed for irrigation is dependent on many factors; (5)

Answer 11

-the variety that is used,
- the water-holding capacity of the soil,
- the effectiveness of the irrigation system, -
- evaporation, and
- rainfall that occurs directly on the crop

Question 12

Flint corn

Answer 12

also known as Indian corn or calico corn, is a kind of maize that comes from the Zea mays var. indurate plant (Zea mays L.). The term “as hard as flint” refers to the fact that each kernel has a tough outer coating that serves the purpose of protecting the more delicate endosperm.

Question 13

by med-slow flint, quick dent, and med-slow dent

Answer 13

contains the least amount of protein

Question 14

The two different types of starch in yellow and white maize?

Answer 14

• Amylopectin 73%
• ## amylose 27%

Question 15

Maize is classified as a C?

Answer 15

C4 tropical plant, superior to c3 plants, in its efficiency in using carbon dioxide, solar radiation, water, and nitrogen

Question 16

C4 plants are more or less water efficient?

Answer 16

more water efficient.

Question 17

A C4 plant performs a specialised kind of photosynthesis;

Answer 17

which carbon dioxide is first absorbed into a molecule containing four carbon atoms. Under conditions of high light intensity and high temperature, photosynthesis proceeds more quickly in C4 plants than it does in C3 plants. Because the stomata (pores) remain open for a shorter amount of time, this results in a more efficient use of water as compared to that of C3 plants growing in the same region.

Question 18

V6 Growth stage refers to

Answer 18

vegetative 6 or 6 leaves emerged.

Question 19

R1 Growth Stage refers to

Answer 19

Reproductive stage 1: Tassle emerges out the top of the plant and Silking occurs.

Question 20

purpose of the tassle

Answer 20

to generate pollen for fertilisation through the silks.

Question 21

2 thousand to 5 thousand pollen grains are produced for …..

Answer 21

each silk

Question 22

Trichomes are…..

Answer 22

little hair-like projections that are found on maize silks. These trichomes capture viable pollen grains that fall onto the silks.

Question 23

All silks emerge within _____ when conditions are optimal.

Answer 23

3-5 days

Question 24

Brace roots

Answer 24

Aerial roots are those that originate at nodes that are located just above the soil surface and grow downward until they reach the soil. They not only provide support but also additional access to the soil’s moisture and the minerals it contains.

Question 25

ideal temps for Maize?

Answer 25

daytime temperatures of between 25 and 30oC

Question 26

A significant drop in grain production may be brought on by moisture stress over what period?

Answer 26

two weeks before or two weeks after silking

Question 27

warm-hot nights impact on grain yield following pollination

Answer 27

reduces grain yield.

Question 28

Maize rows are often seeded at a width of between

Answer 28

75 and 110 centimetres