About Lesson
Manuring and fertilizer
|
Age(yr) |
FYM |
Ammonium Sulphate |
Super Phosphate |
MOP |
|
1 |
15 |
0.3 |
– |
0.10 |
|
2 |
20 |
0.5 |
0.1 |
0.15 |
|
3 |
30 |
0.7 |
0.2 |
0.2 |
|
4 |
40 |
1 |
0.4 |
0.4 |
|
5 |
50 |
1.5 |
0.6 |
0.5 |
|
6 |
50 |
1.7 |
0.7 |
0.7 |
|
7 or above |
50 |
2 |
1 |
1 |
- doses should be applied in 2-3 split doses before flowering when new leaves and shoots are formed and after fruit set and during the time of fruit development.
Rooting habit
- Over 70% of citrus tree roots are in the top meter(3.3ft)of soil.
- Citrus trees produce a tap root that can extend 2m(6.6ft)below the surface.
- Fibrous roots commonly well beyond the canopy.
Flowering
- Over 300 hours of temperature below 20 0C (680F) followed by warm temperature will induce flowering.
- Large numbers of flowers drop after opening, and large numbers of fruits drop 10–12 weeks after pollination.
- Fruits take 7–14months to mature
Fruit
- Fruit is hesperidium.
- Albedo is the whitish rag or mesocarp covering the endocarp of fruit.
- Flavedo is oil glands of the fruit.
Seeds
- Seeds are polyembryonic.
- Embryo are either zygotic or nucellar.
- Fruits are globose to ovoid in shape.
- The zygotic embryos are derived from pollination and fertilization,i.e.,sexual reproduction, and therefore are not always similar in horticultural qualities to the parent tree.
- The nucellar embryos are derived wholly from the mother plant and display very similar characteristics to the parent plant.
Harvesting and yield
- Being non-climacteric, the citrus fruits fail to ripen and improve in taste after harvest. So, the fruit should be harvested only when they are fully ripe.
- Sweet orange/Mandarin: 1000-1500 fruits/tree
- Lemon: 500-700 fruits/tree
- Lime : about 1000 fruits/tree