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1) Discuss importance of fruit and plantation crops in India.
Importance
- Rich source of minerals & vitamins (protective food)
- More yield than agronomical crop in unit area
- More energy in less area (0.6 ha Wheat = 0.02 Ha Mango)
- Full utilization of land , water & labour round the year
- Can be grown in rainfed condition (87% in Maharashtra)
- Financial stability to farmers (continuous flow of money)
- Ability of earning foreign exchange
- Mixed, multi-storey, intercropping, crop diversification Raw material to various industries
- Employment generation
- Fruit crops maintain ecological balance
- Fruit trees helps to reduce soil erosion
- Fruit trees reduces family budget
2) Write cultivation of Mango on the following points.
a) Soil and climate b) Propagation and planting
c) Manuring and Irrigation d) Harvesting and yield
a) Soil and climate:
Soil: Lateritic, Alluvial, Sand loam & sand, slightly acidic and well drained, one meter in depth, rich in organic matter, pH 7.5.
Climate: Tropical and sub-tropical crop, Temp. 24-27 °C and in summer 45 °C average rainfall 750-1000mm.
b) Propagation and planting: Soft wood, stone & approach grafting. Planting in high rainfall area at the end of monsoon and low rainfall area it to be done in early part of the monsoon planted at the spacing of 10 x 10 m and in close planting it is to be done at 5x5 m.
c) Manuring and Irrigation:
1st year of planting the manures and fertilizer should be given as 10 kg FYM, 150 gm N, 150 gm POs and 100 gm K20per plant. This increased up to 9 years and 10 years and above 100 kg FYM, 1.5 kg N, 1.5 kg P205 and 1 kg K20 in the form of SOP/Plant. It is given in two split doses one June - July and Second in Oct. Irrigation in winter 6-7 days interval, in summer 2-3 days interval for young plants. For full grown trees 14-15 days interval in winter and 10-12 days interval in summer.
d) Harvesting and yield
When colour of fruit change green to yellowish and one or two ripe fruits fall from the plant naturally then it should be harvested with help of mango harvester. Yield varies from 300 to 1000 fruits per plant. 5 to 15 t/ha.
3) Write cultivation of Banana on the following points.
a) Soil and climate b) Improved varieties c) Propagation and planting d) Harvesting and yield
a) Soil and climate:
All most all types of soil. Banana is a heavy feeder crop. Therefore, fertility of soil is very important. Rich, well drained, fertile, free working soils with plenty of organic matter are best suited for cultivation. The optimum range of pH of soil should be 6 to 8. Climate: Being a tropical crop, banana requires warm, humid and rainy climate. The optimum temperature range is 10 to 40"C and the relative humidity is 90% or above. It is highly susceptible to frost and cannot tolerate arid conditions. Strong desiccating winds cause considerable reduction in the growth of the plant and yield and quality of fruits.[MSIL to 1200 m]
ii. Varieties:
Following are the major banana varieties grown in India
Poovan: It is the most important commercial variety in Tamil Nadu, Andhra Pradesh and West Bengal. It is also known as Lal velchi in Maharashtra. It is resistant to Panama wilt,
Dwarf Cavendish or Basarai: It is a dwarf variety. It is resistant to Panama disease. It is a high yielding variety with fruits large and of good quality. Robusta or Harisal: Fruit colour remains green when ripe. It is best variety for the export purpose.
Rasthali or Mutheli: It is a good variety but susceptible to Panama disease Rajeli or Nendran, Sonakela, Safed Velchi.
i. Propagation & planting:
- Sucker- Daughter plant
- Water sucker with large leaves (yield early, low yield)
- Sword sucker with thin leaves (yield late, bunches large & heavy yield )
- Sword suckers along with the bulbous base from parent rhizome - Ideal
- Sword sucker below 3ft height, 3 to 4 months age & minimum weight 500-800 g.
- Commercially kept for 3 years
Tissue Culture
- Disease free planting material
- Uniform flowering & fruiting
- Early, high & quality yields
Planting: Planting is done by two methods viz. Pit method and furrow method. Planting is done from February to May whereas in North India, it is done during July-August. In South India, it can be done any time of year except summer. Tall varieties should be planted at 3 x3 m where as dwarf ones at 2 x 2 m apart.(Pit size lxlx1 ft)
iv.Harvesting and yield:
Harvesting of banana is done 12 to 15 months after planting in dwarf and 15 to 18 months after planting in tall varieties. Signs of maturity of banana fruits are, fruit becomes plumpy and angles are filled in completely, when tapped gives metallic soúnd, drying off of top leaves and change in colour of fruits from deep green to light green. Tall varieties like Poovan yield 15-25 tones/ha, while Dwarf Cavendish yield 25-50 tones/ha. It can be stored at temperature slightly above 55°F and relative humidity of about 85-95% for about three weeks.
4) Discuss different physiological disorders and their control.
Fruit drop: In spite of very high initial flowering and fruiting in mandarins, the ultimate yield is often low primarily owing to heavy fruit drop. However, all fruits that fail to mature do not drop at one time but at different times. There are more or less definite periods or stages when extensive dropping occurs. In mandarins, the shedding of flowers and fruits come in more or less in 3 distinct waves. The first wave occurs soon after fruit setting, second during May-June known as June drop and third one known as pre-harvest drop, i.e. the drop of mature fruits before harvesting. Fluctuating temperature, low atmospheric humidity, imbalance of soil moisture, lack of proper nutrition, hormonal imbalance, incidence of insect-pests and diseases are some factors causing fruit drop. Accordingly, maintenance of appropriate soil moisture level during fruit development and application of growth regulators 2, 4-D (10ppm), NAA (5ppm), 2, 4, 5-T (5ppm) check fruit drop quite effectively. Further, application of Aureofungin @ 20 ppm helps in better retention of fruits through control of fungal diseases.
Granulation: It is a physiological disorder of juice sacs of citrus including mandarins wherein they become comparatively hard, assume a greyish colour and become somewhat enlarged. The concentration of pectic substances increases, whereas there is reduction in juice content, TSS and acid content. Because of low sugar and acid content, the granulated vesicles become rather tasteless and colourless. Young, vigourous trees are more likely to develop granulated fruits than older ones. Similarly, large fruits have more granulation than small ones. In addition, granulation increases as the picking season advances. The incidence of granulation is highly specific to the type of the mandarin being cultivated. It is favoured by high relative humidity and temperature during spring. Spraying of lime reduces the extent of granulation. Reduction in irrigation also lessens its incidence. The applications of 2, 4-D (12ppm), zinc and copper reduces the incidence of granulation considerably.
1. Soil & climate:
2. Propagation & Selection of seedling:
6) Good girth at collar
3. Improved varieties:
harvested after 11-12 months for dry copra 5-7 months for tender coconut & water & 9-
11 months for mature nuts and fresh copra. Yield 100-150 nuts/tree/year.
- Ringing girdling will increases the concentration of carbohydrates above the wing.
- It also reduce the nitrogen supply because subsequent to stopping of food to the roots
- No more root growth, no nitrogen supplies the result will be wide C:N ratio and then flowering increase
- Ringing is a drastic operation when fruits trees fail to set fruits
- Ringing is done in vigrous mango tree.
- Deep well drained soil are suitable
- Latesites & red loams & alluvial soils are preferable.
- Does not stand water stagnation.
- Drainage is more important in high rainfall areas
- climatic condition
- A topical plant.
- It requires well distributed rainfall.
- Cultivated mainly from 280 N & S latitudes.
- Require moist climate.
- Optimum temp. 15-38°C.
- It requires a soil of high fertility & good drainage soil due to papaya is evergreen plant.
- Papaya has shalloo soot system & can even be grown in soil having 45 cm depth.
- Papaya can be grown on wide range of soil
- PH required range is 6.5-70.
- climate
- It required worm humid climate & cultivated upto elevation of about 1000-1200 m.
- optimum temperature 38-44°c.
- Temperature below 10°c retards the process of maturity & ripening of fruits.
ii) Drum roasting method: Rotating metal drum is heated from below. Nuts catch
fire within 3 to 5 minutes. A temperature of 100 to 120 °C is always maintained inside the drum. Burning nuts are released at the other end and fire is put off by sprinkling water and ash. Rate of shelling and out turn of whole kernels are very high in this method. In this method also CNSL is not recoverable.
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