Flashcards
Sweet corn cultivation: climate, soil and harvest
Cards in this deck (28)
- 1Which state in Australia produced the second most corn?Queensland
- 2What is the history of sweet corn?Mexico, Peru (5000-6000BC)
Mayan
Aztec, Inca
Chile, Brazil
Southern Canada
Caribbean
James Ruse - 3Describe maize cornMaize corn is a coarse grain commonly fed to livestock and used in the manufacture of breakfast foods. Most are the dent type, meaning they dent/shrink at the top when dry. Tough outer layer so it does not lose much of its shape.
- 4Describe sweet cornSweet corn corn has no hard layer on the outside, therefore shrinks heavily when dry. It is slightly smaller than maize, with a high sugar content. Eaten as fresh cobs preferred by consumer.
- 5Describe popcornPopcorn is the smallest, and has the smallest cob. It has a distinct pointy end and teardrop shape
- 6What is the growing season for sweet cornEarly spring to summer
- 7What is the ideal climatic conditions for sweet cornSunny, warm position sheltered from the wind
- 8What is the ideal soil type for corn (including preferred pH)Deep, fertile loams, with a preferred pH of 5.5-6.5
- 9Expected height of corn?1.8m
- 10Depth of sowing for sweet corn?2.5-3.5cm
- 11Spacing between sweet corn plants?25cm
- 12Spacing between corn rows?50cm
- 13How much moisture does corn require?500-600mm of moisture
- 14What is the NPK ratio for sweet corn?3 : 1.9 : 1.5
- 15Name some micronutrients for sweet cornMolybdenum, boron, zinc, sulphur
- 16Name a sweet corn PEST, the symptoms, and managementHelicoverpa Armigera (Cotton Bollworm)
symptoms - larvae damage seedlings by eating terminal buds, and attacking above-ground plant parts including pods and seeds. holes in leaves
management- using soft insecticide to preserve beneficial insects. target larvae up to 7mm in length. - 17Name a sweet corn DISEASE, its cause, the symptoms, prevention, and controlCommon Rust, caused by the fungus Puccinia Sorghi
symptoms- development of dark reddish brown pustules on the surface of the leaves
Prevention- avoid planting in places where dew is heavy (e.g near trees, fences)
Grow at proper spacing to ensure sunlight reaches all leaves
Control- early fungicide application
On a dry day, gather all the badly affected leaves and dispose of them in the trash - 18What are the observations at the time of corn harvest?1. silks are brown and falling off
2. cob is sticking at 30 degrees to the stem
3. cobs are two thirds full - 19How is processed corn harvested?By a six-row self-propelled harvester, which strips the stalks one foot from the ground, shooting the stalks through the header to the ground
- 20How do you fix up the corn BEFORE harvesting?Excess leaves are trimmed, cob is checked for insect damage before harvesting
- 21how do you harvest corn manually/by hand?The cob is removed from the plant with a cane knife and sold with the husk on.
- 22How do you fix up the corn AFTER harvesting?excessive flag and shank on the cob is undesirable
- 23How do you preserve freshness of the corn?Rapid transport and cooling
- 24Name three ways the stubble residue can be used after harvest1. used as cattle fodder
2. grazed unless burnt
3. ploughed down - 25describe function of deep ripper machineDeep ripper mechanically breaks up compacted soil layers using strong tines working down.
- 26describe function of chisel ploughUsed for deep tillage to loosen and aerate the soil, while leaving crop residue at the surface.
note: shatters but does not turn or move the soil - 27describe function of rotary hoeversatile usage
- 28describe function of precision row crop planter
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- Flashcards on Untitled, created by Iman Abdu on 19/05/2022.
- Created by
- Iman Abdu · May 2022
- Updated
- May 20, 2022
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