APPSC Horticulture Officer key terms

The branch of horticulture dealing with the cultivation, physiology and management of fruit crops such as mango, citrus, banana and guava, covering orchard establishment, training, pruning and fruit quality.

The branch of horticulture concerned with production of vegetable crops, including nursery raising, transplanting, crop scheduling and harvest management for vegetables like tomato, brinjal and okra.

The science and practice of growing and marketing flowering plants and cut flowers, including loose flowers, cut flowers, potted plants and landscape ornamentals for commercial and aesthetic use.

A flower sold without a stalk, such as jasmine, marigold, chrysanthemum or crossandra, used mainly for garlands, decoration and religious purposes and traded by weight rather than stem.

A perennial crop grown on a large estate and usually processed on or near the farm, such as coconut, cashew, coffee, tea, rubber, oil palm and cocoa, with a long gestation period.

A plant part valued for aroma, flavour or pungency used in small quantities as a food adjunct, for example turmeric, chilli, coriander, pepper, cardamom, ginger and cumin.

The total quantity of exchangeable cations a soil can hold per unit weight, expressed in centimoles of charge per kilogram; it indicates the soil's capacity to retain nutrients such as calcium, magnesium and potassium.

The proportion of the soil's cation exchange capacity occupied by basic cations such as calcium, magnesium, potassium and sodium rather than acidic ions like hydrogen and aluminium, usually expressed as a percentage.

The degree of acidity or alkalinity of soil expressed as pH, which governs nutrient availability, microbial activity and choice of rootstock or crop, with most horticultural crops preferring pH 6.0 to 7.0.

The soil test value below which a crop response to applied fertilizer is expected; it is used to classify soils as deficient or sufficient and to frame fertilizer recommendations.

A practice of supplying plant nutrients through a combination of organic manures, biofertilizers, green manures and mineral fertilizers to sustain yields while maintaining soil health and reducing nutrient losses.

Application of water-soluble fertilizers through a drip or sprinkler irrigation system so that nutrients are delivered directly to the root zone in small, frequent doses matched to crop demand.

A decision-based approach that combines monitoring, cultural, mechanical, biological and chemical tactics, using pesticides only when pest populations cross economic thresholds, to control pests sustainably.

The pest population density at which control measures should be initiated to prevent the pest from reaching the economic injury level, where damage cost equals control cost.

Suppression of pest or pathogen populations by introducing or conserving their natural enemies, such as parasitoids, predators and antagonistic microbes, rather than relying solely on chemical pesticides.

A genus of soil-borne antagonistic fungi widely used as a biocontrol agent against root and wilt pathogens through mycoparasitism, competition and induced systemic resistance in horticultural crops.

A set of four criteria used to establish that a specific microorganism causes a particular disease: consistent association, isolation in pure culture, reproduction of symptoms on inoculation, and re-isolation.

A plant-parasitic nematode of the genus Meloidogyne that invades roots and induces galls, reducing water and nutrient uptake and causing stunting and yield loss in vegetables and fruit crops.

The superior vigour, yield or adaptability of a hybrid over its parents, exploited commercially in crops such as tomato, brinjal, chilli, mango and banana through hybrid variety development.

The relative ability of a parent line to transmit desirable traits to its progeny; general combining ability reflects average performance and specific combining ability reflects performance in particular hybrid combinations.

A breeding method in which individual plants are selected from a self-pollinated population, their progenies grown separately and evaluated, and the best uniform progeny released as a pureline variety.

Genetic or epigenetic variation arising among plants regenerated from tissue culture, which can be exploited as a source of novel variants or must be eliminated to preserve clonal uniformity.

Rapid clonal multiplication of plants under sterile in vitro conditions using shoot tip, nodal or callus cultures, widely used for banana, orchids, gerbera and other horticultural crops.

In vitro culture of the meristematic dome and small leaf primordia, used to produce virus-free planting material because meristematic cells often escape systemic viral infection.

A fruit that shows a marked rise in respiration and ethylene production at ripening, such as mango, banana and sapota, and can therefore be ripened after harvest.

Storage of produce in a sealed chamber in which oxygen, carbon dioxide and temperature are deliberately regulated to slow respiration and extend shelf life of fruits and vegetables.

Use of the gaseous plant hormone ethylene, or an ethylene-releasing compound such as ethephon, to trigger uniform ripening of climacteric fruits under controlled temperature and humidity.

Processing or transforming a raw horticultural commodity into a product of higher market value, such as juice, pulp, dried spice, pickle or essential oil, improving shelf life and farmer income.

Management of crop production using site-specific data from sensors, remote sensing and GPS to apply water, nutrients and pesticides exactly where and when needed, improving efficiency and reducing waste.

Systematic collection and analysis of price, demand, supply and competitor information that guides growers and traders in deciding what to produce, when to harvest and where to sell.

A farm management tool that estimates costs, returns and resource requirements for a proposed crop plan or enterprise, helping the farmer compare alternatives before committing resources.

The ratio of total benefits or returns to total costs of an enterprise or project; a ratio above one indicates that returns exceed costs and the activity is financially viable.

The net return a farmer earns from crop and allied enterprises after meeting all paid-out and input costs, used to measure profitability and compare enterprise combinations.

An extension approach in which researchers and farmers jointly test and adapt technologies under real farm conditions, ensuring recommendations fit local resources and needs before wider dissemination.

A district-level farm science centre that conducts vocational training, on-farm testing and frontline demonstrations to transfer agricultural and horticultural technology to farmers and rural youth.

Regular systematic monitoring of pest and disease incidence in fields and markets to detect outbreaks early, issue advisories and decide timely control measures.

A facility that makes farm machinery and equipment available to farmers on rent, helping small and marginal holdings access mechanization without owning costly implements.

The Indian jujube, Ziziphus mauritiana, a hardy arid-zone fruit crop of Andhra Pradesh and other dry regions, valued for its vitamin C content and tolerance to drought and salinity.