Unit 3: Production Technology of Sub-Tropical and Minor Fruits - Subjective Questions

Climate and soil

• Guava is a hardy subtropical fruit crop that can also grow under tropical conditions.
• A warm climate with a distinct dry period during flowering and fruit development is desirable.
• Temperatures of about – favour growth and fruit development. Severe frost and prolonged waterlogging are harmful.
• It grows in many soil types, but deep, fertile, well-drained loam with a pH of about – is preferred.

Important varieties

• Allahabad Safeda
• Sardar or Lucknow-49
• Lalit
• Shweta
• Arka Mridula
• Allahabad Surkha

Propagation

• Seed propagation is mainly used for raising rootstocks.
• Commercial plants are produced through air layering, stooling, inarching, patch budding, or wedge grafting.
• Vegetative propagation maintains varietal purity and promotes early bearing.

Planting

• Planting is normally undertaken during the monsoon or under assured irrigation.
• A common spacing is , while closer spacing may be used in high-density orchards.
• Pits are filled with topsoil, farmyard manure, and recommended plant-protection materials.

Intercultural operations

• Keep basins weed-free through shallow hoeing, mulching, or approved herbicides.
• Apply farmyard manure and fertilizers according to tree age and soil-test recommendations.
• Irrigate young plants frequently; bearing trees need irrigation particularly during fruit set and development.
• Train trees to a single stem up to about – and retain well-spaced scaffold branches.
• Remove suckers, dead shoots, diseased branches, and crossing limbs regularly.

Bahar treatment is the regulation of flowering so that guava trees produce a profitable crop in the preferred season. Guava may flower in more than one season, but rainy-season fruits are often inferior and more prone to pests and diseases.

Objectives

• Obtain high-quality winter-season fruits.
• Avoid excessive rainy-season cropping.
• Improve fruit size, sweetness, colour, and market value.
• Synchronize flowering, harvesting, and orchard operations.

Practices used

• Withholding irrigation: Water is withheld during the resting period to induce temporary moisture stress.
• Root exposure: Soil around the trunk may be removed carefully to expose feeder roots for a short period.
• Root pruning: Limited root pruning may be adopted in vigorous trees, but severe injury must be avoided.
• Deblossoming: Unwanted flowers are removed manually or with locally recommended chemical sprays.
• Shoot pruning: Light pruning removes the current season's growth carrying unwanted flowers and promotes a new flowering flush.
• Nutrient restoration: After the stress period, exposed roots are covered with soil and manure, fertilizers are applied, and irrigation is resumed.

For winter cropping, the rainy-season flowering is suppressed and the desired flowering flush is encouraged. Crop regulation must be adjusted according to climate, cultivar, tree vigour, and water availability.

Vegetative propagation is preferred because seedling sapota plants are highly variable, take longer to bear, and may not retain the desirable characters of the mother plant.

Advantages of vegetative propagation

• Produces true-to-type plants.
• Ensures uniform growth and fruit quality.
• Reduces the juvenile period.
• Permits the use of adapted and vigorous rootstocks.
• Establishes orchards with uniform harvesting and management requirements.

Rootstocks

• Khirni or rayan: The most widely preferred rootstock because of its strong root system, drought tolerance, and good graft compatibility.
• Sapota seedlings: Sometimes used, but the resulting plants may be comparatively variable and slow growing.

Commercial methods

1. Inarching:

   • A healthy rootstock seedling is brought close to a selected branch of the mother tree.
   • Matching cuts are made on stock and scion and tied together.
   • After union formation, the scion is detached from the mother plant and the rootstock top is removed.

2. Softwood grafting:

   • A young, actively growing rootstock is headed back.
   • A wedge-shaped scion from a superior mother plant is inserted and tied securely.
   • High humidity and partial shade improve graft success.

3. Approach grafting:

   • It follows the same basic principle as inarching and gives reliable union formation, although it is labour-intensive.

Healthy, pest-free mother plants and mature scion shoots should be selected for successful propagation.

Climate and soil

• Sapota is a tropical to subtropical evergreen fruit crop suited to warm and humid conditions.
• It grows best at approximately – and is sensitive to severe frost.
• Deep, fertile, well-drained alluvial, sandy-loam, or medium-black soils are suitable. Waterlogging should be avoided.

Varieties

Important varieties include Kalipatti, Cricket Ball, Pala, Kirthibarthi, CO-1, CO-2, PKM-1, DHS-1, and DHS-2.

Planting

• Vegetatively propagated plants, generally grafted on khirni, are preferred.
• Normal spacing is about or , depending on soil fertility and cultivar vigour.
• Planting is usually done during the monsoon; square planting is common.
• Windbreaks are useful in exposed areas.

Nutrition and irrigation

• Farmyard manure and age-based doses of nitrogen, phosphorus, and potassium are applied annually.
• Fertilizers are generally split and applied around the active root zone.
• Young plants require frequent irrigation, whereas established trees are irrigated at wider intervals.
• Irrigation is particularly important during flowering and fruit development. Drip irrigation conserves water and facilitates fertigation.

Training and interculture

• Train young plants to form a strong framework with well-spaced branches.
• Remove rootstock sprouts, dead branches, and overcrowded shoots.
• Maintain clean basins and use mulches or cover crops to conserve soil moisture.

Harvesting and yield

• Fruits are harvested when fully developed, the brown scaly surface becomes smoother, and scratching reveals a yellowish-brown surface instead of green tissue.
• Immature fruits contain abundant latex and do not ripen properly.
• Fruits are hand-picked and graded according to size and maturity.
• Yield varies with cultivar, tree age, climate, and management; a mature tree may produce roughly – of fruits annually under good conditions.

Climate

• Grape requires a warm, dry climate with abundant sunlight.
• Dry weather during flowering and ripening promotes good fruit set, sugar accumulation, and berry quality.
• Rain during flowering may reduce fruit set, while rain near harvest encourages berry cracking and fungal diseases.
• Temperatures of about – are generally favourable, depending on the cultivar and stage of growth.

Soil

• Deep, fertile, well-drained loam to clay-loam soils are suitable.
• Good drainage is essential because grape roots are sensitive to prolonged waterlogging.
• The crop can tolerate moderate soil salinity when suitable rootstocks and management practices are used.

Important varieties

• Table grapes: Thompson Seedless, Tas-A-Ganesh, Sonaka, Manik Chaman, Anab-e-Shahi, Sharad Seedless, and Bangalore Blue.
• Wine or processing grapes: Cabernet Sauvignon, Chenin Blanc, Shiraz, and locally recommended cultivars.

Propagation

• Grapes are commonly propagated by hardwood cuttings prepared from healthy, mature, one-year-old canes.
• Cuttings generally contain three to four healthy buds and are rooted in nursery beds or containers.
• Grafting or budding on rootstocks is preferred where nematodes, salinity, drought, or soil-borne problems are important.
• Rootstocks such as Dog Ridge, Salt Creek, St. George, and 110-R may be selected according to local conditions.

Only disease-free mother vines with desirable yield and fruit-quality characteristics should be used as a source of planting material.

Need for training

Grape is a vigorous vine and requires support to expose leaves and bunches to sunlight, facilitate intercultural operations, and obtain regular bearing.

Major training systems

1. Head system:

   • Vines are trained to a short trunk with several arms near the top.
   • It is economical and suited to less vigorous cultivars and comparatively dry regions.

2. Kniffin system:

   • Canes are tied to horizontal wires arranged at different heights.
   • It provides better distribution of shoots than the head system.

3. Bower or pergola system:

   • Vines are trained over an overhead network of wires.
   • It is suitable for vigorous cultivars and provides a large bearing surface.
   • Initial establishment cost and labour requirements are high.

4. Telephone or T-trellis system:

   • A vertical trunk supports cross-arms and parallel wires.
   • It improves light distribution and facilitates canopy management.

5. Y-trellis system:

   • The canopy is divided into two inclined arms, improving light penetration and spray coverage.

Principles of pruning

• Grapes bear on current-season shoots that arise from buds on one-year-old mature canes.
• Pruning regulates the number and position of fruitful buds.
• Spur pruning retains short canes with approximately two to four buds and is used when basal buds are fruitful.
• Cane pruning retains longer canes where fruitful buds are located farther from the cane base.
• Dead, weak, diseased, and poorly matured canes are removed.

Influence on cropping

• Light pruning leaves excessive buds, producing overcrowding, small bunches, and poor ripening.
• Severe pruning reduces the number of bearing shoots and total yield.
• Balanced pruning maintains an appropriate relationship between vegetative growth and crop load, resulting in regular yield and improved berry quality.

Canopy management

• Shoot thinning: Removes excess, weak, and non-bearing shoots to reduce competition.
• Shoot positioning and tying: Spreads shoots uniformly over the trellis and prevents entanglement.
• Tipping and pinching: Restricts excessive shoot growth and diverts assimilates toward inflorescences and berries.
• Leaf removal: Selective removal of leaves near bunches improves light penetration, aeration, colour development, and spray coverage.
• Removal of water shoots: Prevents wastage of nutrients on unproductive growth.

Bunch management

• Inflorescence thinning: Retains a crop load appropriate to vine vigour.
• Bunch thinning: Removes excess or poorly placed clusters to improve the size and uniformity of retained bunches.
• Bunch trimming: Removes the shoulder or tip of compact clusters and reduces berry crowding.
• Berry thinning: Produces loose, attractive bunches with larger berries.
• Girdling: A narrow ring of bark may be removed from a cane or arm to improve berry size and advance maturity; it must be performed carefully.
• Growth-regulator use: Gibberellic acid may be used at cultivar-specific stages for cluster elongation, thinning, and berry enlargement in seedless grapes.
• Bunch bagging: Protects berries from birds, insects, sunburn, dust, and spray deposits.

These operations must be timed according to cultivar, flowering stage, vine vigour, and intended market. Excessive treatment can cause loose bunches, uneven maturity, or reduced return bloom.

Climate

• Litchi is a subtropical evergreen fruit requiring a cool, dry winter for flower-bud differentiation and a warm, humid period for fruit development.
• Mild winter temperatures favour flowering, but severe frost damages young trees.
• Hot, dry winds during fruit development cause moisture stress, fruit cracking, and poor aril development.
• Rainfall or high humidity at harvest may encourage fruit rotting.

Soil

• Deep, fertile, well-drained sandy-loam to clay-loam soils rich in organic matter are ideal.
• Slightly acidic soils, approximately pH –, are preferred.
• Waterlogging and highly calcareous or saline soils should be avoided.

Air layering or gootee

1. Select a healthy, pencil-thick, one-year-old shoot from a true-to-type mother tree.
2. Remove a complete ring of bark about – wide below a node.
3. Scrape the cambial layer gently to prevent the bark from rejoining.
4. Apply a rooting hormone, where recommended, to promote root initiation.
5. Cover the girdled portion with moist sphagnum moss, rooting medium, or a soil and organic-matter mixture.
6. Wrap it tightly with polyethylene to retain moisture.
7. After adequate root formation, detach the layer gradually or cut it below the rooted region.
8. Harden the rooted layer under partial shade before field planting.

Air layering produces true-to-type and early-bearing plants, although layered plants require careful handling because their initial root system is relatively limited.

Orchard establishment

• Healthy air-layered plants of recommended cultivars such as Shahi, China, Rose Scented, Dehradun, or Bedana are used.
• Planting is generally done during the monsoon at about – spacing because mature trees develop a broad canopy.
• Windbreaks protect young plants and reduce hot-wind injury.
• Young plants may be shaded and their basins mulched during summer.

Nutrition and irrigation

• Farmyard manure and age-based quantities of nitrogen, phosphorus, and potassium are applied annually.
• Micronutrients such as zinc and boron are supplied only when deficiency is diagnosed.
• Irrigation is critical during fruit set and aril development.
• Frequent light irrigation or drip irrigation helps maintain uniform soil moisture.
• Water should be reduced before flower initiation where a cool, relatively dry resting period is required.

Control of fruit cracking

• Maintain uniform soil moisture during fruit development.
• Use organic mulches to moderate soil temperature and moisture fluctuations.
• Establish windbreaks and provide irrigation during hot, dry winds.
• Apply locally recommended calcium or boron treatments after confirming need, because indiscriminate use may be harmful.
• Select cultivars that are less susceptible to cracking.

Harvesting

• Fruits are harvested when the peel develops the characteristic pink or red colour, tubercles flatten, and flavour is fully developed.
• Litchi does not improve substantially after harvest, so immature harvesting should be avoided.
• Clusters are clipped with a small portion of the shoot and leaves, avoiding damage to next season's bearing wood.

Post-harvest handling

• Grade fruits and remove cracked, diseased, or damaged ones.
• Cool rapidly and maintain high relative humidity to limit peel browning.
• Use suitable moisture-retentive packaging and refrigerated transport.
• Approved treatments and modified-atmosphere packaging may extend storage life and preserve peel colour.

Climate and soil

• Pineapple is a tropical fruit crop suited to warm, humid, frost-free conditions.
• A temperature range of about – is favourable.
• Well-drained, acidic sandy-loam soils rich in organic matter are preferred, generally within pH –.

Planting material

• Suckers: Arise from the underground or basal portion and bear relatively early.
• Slips: Develop on the peduncle below the fruit and are commonly used.
• Crowns: Present at the top of the fruit; they are uniform but usually take longer to bear.
• Planting units should be graded by size and treated against pests and diseases before planting.

Planting systems and spacing

• Pineapple is commonly planted in single rows, double rows, or a paired-row system.
• Double-row planting permits a high plant population and facilitates field operations.
• A representative paired-row arrangement may use approximately – between plants, – between paired rows, and \,\text{cm}$ between beds, with local adjustment.
• Plant population can be estimated as , where is field area, is effective row spacing, and is plant spacing.

Nutrition

• Pineapple responds strongly to nitrogen and potassium.
• Fertilizers are applied in split doses around the plant base or through foliar feeding and fertigation.
• Phosphorus and organic manure are generally incorporated during land preparation.

Irrigation and drainage

• Supplemental irrigation is provided during prolonged dry periods.
• Drip irrigation is efficient, but excess water must drain rapidly because waterlogging causes root and heart rots.

Weed management

• Shallow hand weeding is practised to avoid root injury.
• Organic or polyethylene mulch suppresses weeds and conserves moisture.
• Approved pre-emergence or directed herbicides may be integrated with manual methods.

Earthing-up helps anchor plants, particularly during fruit development.

Flower induction is the artificial initiation of flowering in physiologically mature pineapple plants through the application of a flowering agent.

Need for induction

• Produces uniform flowering and harvesting.
• Facilitates organized labour use and marketing.
• Reduces the number of field pickings.
• Helps schedule production for a desired market period.
• Improves uniformity within fields planted with material of similar size.

Method

• Only healthy plants that have attained adequate size and leaf development are treated.
• Ethylene-releasing compounds such as ethephon, or other locally recommended induction mixtures, are applied into the central whorl.
• Treatment is preferably done during cool hours and under suitable moisture conditions.
• The exact concentration and volume must follow cultivar-specific recommendations.

Precautions

• Small or immature plants should not be forced because they produce undersized fruits.
• Uneven planting material results in non-uniform response.
• Excess concentration can injure the growing point or produce malformed fruits.
• Heavy rain immediately after treatment may reduce effectiveness.
• Adequate nutrition and moisture should be maintained after induction.

Ratoon management

• After the plant crop is harvested, one or two vigorous suckers are retained for the ratoon crop.
• Weak and excess suckers are removed to maintain uniformity.
• Fertilizer, irrigation, earthing-up, weed control, and plant-protection measures are continued.
• Uniform ratoon suckers may also be induced after they reach adequate physiological maturity.

Climate and soil

• Pomegranate performs well in tropical and subtropical climates.
• Hot, dry weather during fruit development promotes colour and sweetness, while severe frost damages young growth.
• A clear dry period is useful for crop regulation.
• Deep, well-drained loam is ideal, although the crop tolerates moderately calcareous and saline soils better than many fruit crops.

Important varieties

• Bhagwa
• Ganesh
• Arakta
• Mridula
• Ruby
• Kandhari

Propagation

• Hardwood cuttings are the most common commercial method.
• Cuttings are prepared from healthy, mature shoots and rooted in nursery beds or under protected conditions.
• Air layering and tissue culture may also be used.

Planting

• Planting is normally done during the monsoon or spring under irrigation.
• Spacing may range from approximately to , depending on system, cultivar, and soil fertility.
• Pits are filled with topsoil and well-decomposed farmyard manure.

Training and pruning

• In the single-stem system, one trunk is retained and scaffold branches are allowed above the ground.
• In the multi-stem system, three to four well-spaced stems are retained; this system provides some protection against stem damage.
• Basal suckers, dead wood, crossing branches, and diseased shoots are removed regularly.
• Excessive pruning is avoided because flowers are borne on mature shoots and short spurs.

Nutrition and irrigation

• Apply organic manure and balanced nitrogen, phosphorus, and potassium based on tree age, expected crop, and soil testing.
• Nitrogen and potassium are often split around flowering and fruit development.
• Drip irrigation and fertigation improve water-use efficiency.
• Uniform soil moisture is essential; alternating drought and heavy irrigation may cause fruit cracking.
• Orchard sanitation and good drainage are important for reducing wilt, root diseases, and bacterial blight risk.

Bahar regulation

Pomegranate can flower in different seasons. The flowering season is selected according to water availability, climate, disease pressure, and market demand.

• Ambe bahar: Flowering occurs during January–February and harvesting generally occurs during the rainy season.
• Mrig bahar: Flowering occurs around June–July and harvesting takes place during winter.
• Hasta bahar: Flowering occurs around September–October and fruits are harvested later in the dry season.

To regulate the crop, irrigation is withheld for a prescribed resting period. Light root exposure, limited pruning, and leaf shedding may be encouraged. Irrigation, manuring, and fertilizer application are then resumed to obtain uniform flowering. Only one major crop is generally encouraged to avoid tree exhaustion.

Fruit cracking

Cracking may result from:

• Sudden irrigation or rainfall after prolonged drought.
• High temperature and low humidity.
• Nutritional imbalance, especially inadequate calcium or boron.
• Susceptible cultivar, delayed harvesting, or uneven peel growth.

Management

• Maintain uniform soil moisture with drip irrigation.
• Mulch the root zone to reduce moisture fluctuations.
• Harvest fruits at proper maturity.
• Use tolerant varieties wherever available.
• Protect orchards from hot, dry winds.
• Apply calcium, boron, or other nutrients only according to soil, leaf, and local recommendations.
• Maintain a balanced crop load and avoid excessive nitrogen application.

Soft-fleshed type

• The ripe flakes or bulbs are soft, juicy, and often fibrous.
• Fruits may be easy to open, but bulbs have poorer keeping and transport quality.
• This type is commonly used for fresh consumption and local processing.

Firm-fleshed type

• Bulbs are firm, crisp, less fibrous, and easier to separate from the rind and core.
• Fruits generally possess better handling and transport quality.
• Firm bulbs are preferred for distant markets and value-added products.

Propagation by seed

• Fresh seeds germinate readily and are used for raising rootstocks.
• Seeds lose viability quickly and should be sown soon after extraction.
• Seedling plants show variation and have a long juvenile period; therefore, they are not preferred for uniform commercial orchards.

Vegetative propagation

• Softwood grafting: A scion from a superior mother tree is inserted into a young seedling rootstock.
• Epicotyl grafting: Very young seedlings are grafted soon after germination.
• Approach grafting or inarching: Stock and scion remain attached to their roots until union formation.
• Budding: Patch or other suitable budding methods may be employed where conditions favour good bark slipping.

Vegetatively propagated plants retain desirable characters such as flake texture, fruit size, sweetness, bearing habit, and maturity season. Scion wood should be obtained from regular-bearing, high-yielding, disease-free trees.

Planting

• Jackfruit prefers a warm, humid tropical to subtropical climate and deep, well-drained soil.
• Young plants are susceptible to frost, drought, and waterlogging.
• Grafted plants are planted during the monsoon, commonly at about – spacing because trees become large.
• Pits are filled with fertile topsoil and well-decomposed organic manure.

Canopy management

• Train the tree to a clean trunk and retain well-spaced scaffold branches.
• Remove dead, diseased, crossing, and inward-growing limbs.
• Excessively low or weak shoots and unwanted epicormic growth are removed.
• As jackfruit bears on the trunk and main branches, indiscriminate removal of bearing surfaces must be avoided.
• After harvesting, damaged stalks and diseased portions should be removed and the orchard kept clean.

Harvesting indices

• Spines become flatter and farther apart.
• Fruit colour changes from deep green to greenish-yellow or yellowish-brown.
• A dull, hollow sound is produced when the fruit is tapped.
• Latex flow decreases and becomes thinner.
• A characteristic aroma develops as the fruit approaches ripeness.

Fruits are cut with a portion of the stalk and lowered carefully to prevent impact damage. Latex is allowed to drain before handling.

Uses

• Immature fruits are cooked as a vegetable or processed.
• Ripe bulbs are consumed fresh, dried, frozen, canned, or made into beverages and sweets.
• Seeds are boiled, roasted, or processed into flour.
• Pectin and livestock feed can be prepared from processing residues.
• Jackfruit wood is valued for furniture and construction.

Dioecious nature

Date palm is dioecious, meaning male and female flowers are produced on separate palms. Female palms bear marketable fruits only after receiving viable pollen from a compatible male palm.

Propagation

1. Seeds:

   • Seedlings show wide variation and approximately half may be male.
   • Sex cannot be identified reliably until flowering.
   • Seed propagation is therefore unsuitable for uniform commercial plantations.

2. Offshoots:

   • Offshoots develop near the base of selected mother palms.
   • Well-rooted offshoots of adequate size are detached carefully and planted.
   • They produce true-to-type palms and bear earlier than seedlings.

3. Tissue culture:

   • Used for rapid multiplication of elite female cultivars.
   • Plantlets must be hardened properly and obtained from reliable laboratories to minimize abnormality and off-types.

Planting

• Date palm requires a hot, dry climate, abundant sunlight, and a long rain-free period for fruit ripening.
• Deep, well-drained sandy-loam soils are suitable; the palm has moderate salinity tolerance.
• Palms are commonly planted at about – spacing.
• Adequate irrigation is necessary even though the aerial climate should remain dry.

Artificial pollination

• Mature male spathes are collected when they begin to split.
• Pollen-bearing strands are dried carefully and used fresh or stored under suitable conditions.
• A few male strands are inserted into a newly opened female inflorescence, or extracted pollen is dusted mechanically.
• Pollination should be completed soon after the female spathe opens.
• A small number of selected male palms can supply pollen for many female palms.

Artificial pollination ensures reliable fruit set, reduces dependence on wind, and allows the use of superior pollen sources.

Bunch management

• Bunch thinning: Excess bunches are removed to balance crop load with leaf area and palm vigour.
• Strand or fruit thinning: Some strands or fruits are removed to improve fruit size, aeration, and uniformity.
• Bunch support: Heavy bunches are tied to leaves or supported to prevent stalk breakage.
• Bunch lowering: Bunches may be lowered carefully to facilitate pollination, thinning, bagging, and harvesting.
• A suitable leaf-to-bunch ratio should be maintained to ensure adequate carbohydrate supply.

Stages of maturity

• Kimri: Fruit is immature, green, hard, and has high moisture and tannin content.
• Khalal: Fruit reaches full size and develops the characteristic yellow, red, or other varietal colour; texture remains crisp.
• Rutab: Fruit begins to soften and brown, with increasing sweetness and decreasing astringency.
• Tamar: Fruit becomes fully ripe, soft to semi-dry, highly sweet, and suitable for storage in dry-date cultivars.

Harvesting

• Harvesting stage depends on cultivar, intended use, weather, and market distance.
• Bunches may be harvested completely or picked in several rounds when ripening is uneven.
• Fruits should be handled gently and graded to remove damaged or fermented produce.

Protection

• Bunches are covered with perforated paper, cloth, or mesh bags to reduce bird and insect damage.
• Covers also protect fruits from dust and light rain while maintaining ventilation.
• In areas with rain near harvest, bunch covers and prompt harvesting reduce splitting, souring, and fungal decay.

Climate and soil

• Ber is a hardy fruit crop adapted to arid and semi-arid subtropical regions.
• It tolerates high temperature, drought, and moderate salinity, although frost can damage young growth and flowers.
• It grows in a wide range of soils but performs best in well-drained sandy-loam to loam soil.

Propagation and rootstocks

• Seeds are used mainly for raising rootstocks.
• Seeds or stones may require cracking, soaking, or other pre-sowing treatment to improve germination.
• Commercial cultivars are propagated mainly by T-budding, shield budding, or ring budding.
• Seedlings of vigorous, locally adapted ber types are used as rootstocks.
• Budwood is collected from healthy, true-to-type, regularly bearing mother trees.

Planting

• Budded plants are established during the monsoon or spring under irrigation.
• Common spacing ranges from approximately to , depending on cultivar and soil.
• Important cultivars include Umran, Gola, Seb, Banarasi Karaka, Kaithli, and Sanaur types.

Training

• Develop a clean trunk up to about –.
• Retain four to six well-spaced scaffold branches in different directions.
• Remove rootstock sprouts, low branches, and competing leaders.

Annual pruning

• Ber bears on current-season shoots; therefore, annual pruning is essential.
• Bearing shoots from the previous season are headed back during the dormant or leafless period.
• Dead, diseased, weak, and crowded branches are removed.
• The severity of pruning is adjusted to cultivar and tree vigour.
• After pruning, manure, fertilizers, irrigation, and plant-protection measures encourage a strong, uniform fruiting flush.

Correct pruning maintains tree size, improves light penetration, and promotes regular production of fruitful shoots.

Nutrient management

• Apply well-decomposed farmyard manure annually to improve soil structure and moisture retention.
• Nitrogen, phosphorus, and potassium are supplied according to tree age, soil fertility, and expected crop.
• Nitrogen is commonly split between the post-pruning growth period and fruit-development stage.
• Zinc, iron, or boron deficiencies should be corrected only after proper diagnosis.

Water management

• Ber is drought tolerant, but irrigation improves fruit set, size, and yield.
• Critical stages include new shoot growth, flowering, fruit set, and fruit enlargement.
• Excess irrigation and waterlogging should be avoided.
• Drip irrigation and organic mulching improve water-use efficiency in arid areas.

Fruit-set improvement

• Maintain adequate pollinator activity and avoid insecticide sprays during peak flowering.
• Grow compatible cultivars where cross-pollination improves fruit set.
• Maintain balanced nutrition and irrigation to reduce flower and fruit drop.
• Avoid excessive nitrogen, which promotes vegetative growth at the expense of cropping.

Harvesting indices

• Fruits attain full size and characteristic cultivar colour.
• The surface changes from dark green to light green, yellow, golden yellow, or reddish-brown.
• Pulp becomes crisp or soft depending on cultivar, while sweetness increases and acidity declines.
• Fruits are harvested in several pickings because all fruits do not mature simultaneously.

Post-harvest handling

• Harvest with minimum stalk and skin injury.
• Sort out immature, overripe, cracked, and pest-damaged fruits.
• Grade according to size, colour, and quality.
• Pack in ventilated containers with cushioning material.
• Pre-cooling and cool storage reduce moisture loss and extend market life.

Comparison of propagation methods

Importance of correct planting material

• Maintains genetic purity and desired cultivar characters.
• Promotes uniform growth, flowering, and harvesting.
• Reduces the juvenile period and encourages early bearing.
• Prevents the spread of systemic diseases, nematodes, and insect pests.
• Allows the use of rootstocks adapted to drought, salinity, calcareous soils, or soil-borne problems.
• Determines orchard life, productivity, fruit quality, and market suitability.
• Makes training, pruning, fertigation, crop regulation, and harvesting easier.

Planting material should therefore be obtained from an accredited nursery and should be healthy, true-to-type, well-rooted, properly hardened, and free from visible pests, diseases, and mechanical injury.