eChapters

In this chapter we will discuss about economics of raising 100 Khaki Campbell duck for egg production. Popular breed of ducks for egg production includes Khaki Campbell and Indian Runner. Among the egg laying breeds, Khaki Campbell is the best producer. Individual egg production of almost an egg a day in this breed for well over twelve months has been recorded and flock averages in excess of 300 eggs per duck per year are not uncommon. Khaki Campbell ducks weigh about 2-2.2 kgs and drakes 2.2-2.4 kgs. Egg size varies from 65-70 gms.

Cost and estimates for establishment of a 100+15 Khaki Campbell duck unit (under semi-intensive system)

Former Director, ICAR-IIHR, Hesaraghatta Lake Post Bengaluru- 560089 Karnataka

The ICAR-Indian Institute of Horticultural Research, Hesaraghatta, Bengaluru, organized five- day National Horticulture Fair (NHF 2021) from February 8^th to 12th with the theme ‘Horticulture: for start-up and stand-up India’ in collaboration with several agencies. The fair was held on a dual mode with the approaches of virtual and physical. 

Principal Scientist and I/c Head, Division of Social Sciences and Training, IIHR, Hessaraghatta Lake Post, Bangalore – 560 089, Karnataka

Entrepreneurs have many forms of retail business ownership available to them. Each business model has its own list of pros and cons. Choosing a type of retail business to start will depend on why you want to own a business, as well as your lifestyle, family, personality, basic skills and much more. Here are a few of the main types of retail ownership and the advantages, disadvantages, and support system of each.

Principal Scientist and I/c Head, Division of Social Sciences and Training, IIHR, Hessaraghatta Lake Post, Bangalore – 560 089, Karnataka

Introduction…. A few key things to know

India is predominantly an agrarian economy which employs around 43% of its workforce in the agriculture sector, but it contributes only 16 % to the GDP (FY2020) and the sector contributes to 12 % of the country’s export.

The Food and Agri startup space constitutes agritech and food tech companies, incubators, accelerators, investors, farmers and MSME, etc.

Owing to the rising interest and conducive environment for business (esp. start ups), investment activity in this space has been increasing over the years.

We are still at a nascent stage. w.r.t to investment and market penetration.

Innovations in Field Extension

Of late, a lot of emphasis is being given on innovative extension approaches at the field level, in order to ensure an effective implementation of the Transfer of Technology (ToT) process. Many such new initiatives have been undertaken in India, the details of which are as under.

Farmer Field Schools - ANew Participatory Approach

High Yielding Variety Programme (HYVP)

High Yielding Variety Programme (HYVP) was launched in 1966, which helped the country in attaining self-sufficiency in food. The technological development did not remain confined to the introduction of high yielding crop varieties alone. These were combined with the application of high analysis and balanced fertilizer, irrigation, plant protection, improved implements etc. which made a ‘Green Revolution’possible in the country.

National Agriculture Technology Project (NATP)

This project was launched by the ICAR on June 30, 1998, with the support of the World Bank to strengthen and complement the existing resources and to argument the output National Agricultural Research System (NARS).

Objectives

The major objective of this component is:

Community Development concepts

The United Nations defines community development as “a process where community members come together to take collective action and generate solutions to common problems. It is a broad term given to the practices of civic leaders, activists, involved citizens and professionals to improve various aspects of communities, typically aiming to build stronger and more resilient local communities.

Community development is a process where community members come together to take collective action and generate solutions to common problems. Community wellbeing (economic, social, environmental and cultural) often evolves from this type of collective action being taken at a grassroots level.

Meaning of Administration

The Management of public affairs of a government or institution is called administration. In extension education knowledge of administration is very important which can be developed by administrators. This knowledge will make the administrators aware of some of the unanticipated consequences of their decision. Secondly proper administration makes the administrator to his/her skill. Knowledge for solving problems of organization for which they are members.

Definition of Monitoring and Evaluation

Systematic recording of observations, information, gathering, analysis, documentation, reflection, action and re-planning is called monitoring.

It provides programme/projects managers and key stakeholders with regular feedback and early indications of progress or lack of in the achievement of intended results.

Privatization of Agricultural Extension

Process of funding and delivering the extension services by private individual or organization is called Private Extension. Privatization is the act of reducing the role of Government or increasing the role of private sector in an activity or in the ownership of assets. Privatization is the incidence or process of transferring ownership of business from the public sector (Government) to the private sector (business). Private Extension is solely the act of private individuals or organizations where the decision of privatization solely rests with Government implemented in liaison with private extension service provider.

e-Extension

E-extension can be defined simply as the use of electronic technologies (especially ICT) to enhance face-to-face and paper-based transactions. These technologies can be as simple as teleconferences or as complex as wikis and blogs.

Cyber extension (also known as e-extension) may be defined as extension over the cyber space, the imaginary space created by the interconnected telecommunication and computer networks.

History of Expert System

Expert systems were introduced by researchers in the Stanford Heuristic Programming Project, including the “father of expert systems” Edward Feigenbaum, with the Dendral and Mycin systems. Principal contributors to the technology were Bruce Buchanan, Edward Shortliffe, Randall Davis, Williamvan Melle, Carli Scott, and others at Stanford. Expert systems were among the first truly successful forms of AI software. In the 1980s, expert systems proliferated as they were recognized as a practical tool for solving real- world problems. Universities offered expert system courses and two thirds of the Fortune 1000 companies applied the technology in daily business activities.

Training

Training represents activities that teach employees how to better perform their jobs. Training is a powerful tool in the hands of development professional to catalyze human resources. Training is a process of acquiring specific skills to perform ajob better.

Training as the act of increasing the skills of an employee for doing a particular job

Training always aim at lasting improvement on the job. It is primarily organized not for learning more but to behave differently in own endeavors

1. Result demonstration

It is a method of motivating the people for adoption of a new practice by showing its distinctly superior result. The demonstrations are conducted in the farm or home of selected individuals and are utilized to educate and motivate groups of people in their neighborhood. This is a very effective method for the transfer of technology in a community.

Objectives

1. To show the advantages and applicability of a newly recommended practice in farmer’s own situation.

1. Farm Publication

Is a class of publications prepared by the extension agency in printed form, containing information relating to the improvement of farm and home. Farm publications are of various types such as leaflet, folder, bulletin, newsletter, journal and magazine. Farm publications may be used singly or in combination with other extension methods.

Objectives

1. To reach a large number of people quickly and simultaneously at a low cost.
2. To provide accurate, motivating, credible and distortion free information.

Agricultural Journalism

Journalism refers to the production and distribution of reports on recent events. The word journalism applies to the occupation, using methods of gathering information andutilizing literary techniques. Various forms ofjournalistic mediums include: print, television, radio, Internet and in the past: newsreels. The activity or profession of writing for newspapers, magazines, ornews websites or preparing news to be broadcast. The difference between Farm journalism and general journalism.

Diffusion

Diffusion is the process by which an innovation is communicated through certain channels over time among the members of a social system (Rogers & Shoemaker, 1971).

Innovation

Innovation is an idea, practice or object that is perceived as new by an individual or otherunit of adoption.

Adoption

Adoption is a decision to make full use of an innovation as the best course of action available.

Introduction

Focus of extension agencies on production technologies yielded very good results andhence India become self reliant on food production. Significantly,the extension systemhadplayedits role untiringlyintransfer ofproductiontechnologies from lab to land, besides the agricultural scientists, farmers and marketing network. But the farmers at individual level are not realizing remunerative prices for their produce. Add to this, the Indian farmers have to face challenges of global force that are affecting or are likely to affect Indian agriculture. This assumes greater significance in the light of the new international trading regime under WTA and the export opportunities being opened up. 

The main purpose of establishing a nursery is to supply plants whether to one’s own garden or to out station indentors to fetch good income. To obtain adequate returns on the investment made by a nurseryman, one should have fair idea about lifting, packing and storage of the nursery plants.

Lifting of nursery plants

The plants grown in the nursery are to be lifted for establishment at their permanent place or for sale purpose. The careless lifting may affect adversely the establishment of nursery plants. For getting higher rate of success of evergreen plants in the field, it is always advisable to lift the saplings with a ball of earth intact particularly for mango, guava, citrus and litchi etc. However, the deciduous plants like peach, grape, apple, kiwi fruit, hazelnut, pecan nut, cherry, almond, walnut etc. can be lifted bare rooted during dormant conditions. If possible, it is advisable to irrigate the nursery 3-4 days before the actual date of removing the plants in order to prevent root damage. 

Basella (Basella alba and B.rubra) is a common leafy vegetable grown in practically all countries of Tropical Asia and Africa (Syn.Malabar spinach, Ceylon spinach, India spinach, Vine spinach, etc.). The flavour of this green vegetable is mild and similar to spinach. Basella alba is widely grown in Europe, with the red stemmed varieties in particular being popular as ornamentals. It’s a popular green in Asian, Indian, and even African cuisine, albeit the soft veining shoots are preferred above the leaves in Africa. The Chinese names for Malabar spinach literally translate to “flowing water vegetable.”

Bathua is an old plant that is also known as lamb’s quarters or cheel bhaji. Its scientific name is Chenopodium album. In India, the plant leaves are boiled and consumed like other green vegetables. Chenopodium is a weedy annual plant with a high growth rate. This is completely natural and a distinguishing feature of the plant. When the leaves mature, the powdery residue disappears. Look for younger leaves if eating raw. Otherwise, look for sturdy, robust leaves that aren’t wilted.

Botany and taxonomy Chenopodium album is a weedy annual plant belonging to the Chenopodium genus. 

Sauropus androgynus, also known as katuk, star gooseberry, or sweet leaf, is a tropical shrub that is used as a leaf vegetable in some areas. It’s known as Chinese Malunggay in China, and madhura cheera in Kerala, India. It has several upright stems that can grow up to 2.5 metres tall and dark green oval leaves that are 5-6 cm long. It’s known as ‘Multivitamin Greens’ because of its great nutritional value. Chekurmanis, which may be found in practically every household kitchen garden in Kerala, has not been cultivated for commercial use on a significant scale. As a result, there are no data on the area and production of these vegetables.

Around the world, nearly one billion people live along the 3,12,000 Km long coastline. The Indian coastline runs around 8,129 Km distributed along nine coastal states, two groups of islands and two union territories. The coastal ecosystem of India forms a very valuable resource community, supporting the livelihood security of several million rural poor and also contributing the national economy in a large measure. The latest estimates by National Bureau of Soil Survey and Land Use Planning (NBSS & LUP), Nagpur, India, using Global Assessment of Soil Degradation (GLASOD) guidelines indicate that the coastal area in the country is spread over an area of 11.8 million hectares (Mishra, 2005). Yadav et al. (1983) have reported about 3.1 M ha and 2.1 lakh ha of coastal salinity in India and Tamilnadu respectively.

Potassium availability in most of the coastal salt affected soils of India is rich except when the soils are low in clay content (Bandyopadhyay et al., 1985). Plants grown under high salinity may show K deficiency due to the antagonistic effect of Na on K absorption and / or disturbed Na / K ratio. Under such conditions application of K is also known to reduce the adverse effect of salinity and sodicity on crop growth (Qadar, 1995). Singh et al. (1980) reported that the addition of FYM increased the K concentration in the soil. Swarup (1987) reported that the incorporation of green manure increased the available N, P and K status of the soil. Available P and K remarkably increased to a tune of 30 and 44 per cent respectively by the application of coir waste (Santhi et al., 1991).

The chemistry of humic substances is the least comprehended in the field of Soil Science. The many important functions of humus will remain obscure if the structural chemistry of the humic and fulvic acids is not known. A variety of functional groups have been reported in humic substances. However, considerable disagreement still exists in respect of the exact amounts present and, in some cases, proof of existence is lacking.

Some important structural groups of organic molecules are given below:

Organic matter is of immense importance in forming good aggregates in a wide range of soil types, particularly those representing Mollisols, Alfisols, Ultisols and Inceptisols. Organic matter is somewhat less important in the Oxisols where hydrous oxides may play apredominant role. These relationships are depicted in Fig. 13.

Fig. 13.1: Relationship between OM and the formation of soil aggregates

Aggregates do not directly influence plant growth, but they alter the physical and chemical environments in which plant roots grow through their effects on porosity, aeration, moisture retention, etc., when well-irrigated, even fine- textured soils permit adequate exchange of gases with the atmosphere. The polysaccharides of soil have received the greatest attention in producing stable aggregates, but other organic substances bonded to clay through association with Fe or Al may also be involved.

Humic substances, the natural organic materials, represent a mixture of relatively small organic components, which form supramolecular structures held together by dispersive forces such as n - n and van der Waals’ interactions. Identification of the best analytical method for complete characterization of humic substances is still being discussed. Humic substances differ in molecular weight, elemental composition, acidity and cation exchange capacity and often are classified into three major fractions according to their solubility as humic acids, fulvic acids and humins.

Uncertainty is an inevitable character of any system where most of the contradictory factors are either unpredictable or unfathomable. The higher is the complexity, the lesser would be the resilience. Agricultural production system, as it is managed in Indian condition, is the most vulnerable one to a plethora of uncertainties. Mostly managed in an open air rained conditions, it has been exposed to weather and resource uncertainties comprising of market volatility, poor access to technology and a fragile input delivery mechanism. The present study examines and depicts the possible issues and reasons for uncertainty.

7.1. Origin and distribution

• Originated from Tropical South East Asia.

• Cultivated in India, China, Jamaica, Australia, Mexico, North and West Africa and Taiwan, Fiji, Mauritius, Brazil, Indonesia, Japan, Malaysia, Philippines, Thailand and Bangladesh.

• In India, cultivated in Gujarat, Kerala, Arunachal Pradesh, Odisha, Meghalaya, West Bengal, Tamil Nadu, Andhra Pradesh and Karnataka.

• Karnataka, Odisha, Assam, Meghalaya, Arunachal Pradesh and Gujarat together contribute 65 per cent to the country’s total production.

7.2. Economic importance

• India, China and the Japanese people use ginger as food

• Used as drug in cold, cough, vomiting, dizziness, hypertension, impaired vision problems, digestion, fever and stomach diseases.

• Dry ginger and pepper along long pepper tea helps to remove mucus in the body for a long time and helps to protect health.

11.1. Origin and distribution

• Native of Atlantic Coast from Mexico to Brazil.

• Vanilla comes from orchids of the genus vanilla.

• Originally came from Mesoamerica, including parts of modern day Mexico and Guatemala.

• Major vanilla producing countries are Java, Mauritius Tahiti, Seychelles, Madagascar, Indonesia, Mexico, Cameroon and Reunion.

• Madagascar and Indonesia produce two thirds of the world’s supply of vanilla.

• In India, vanilla cultivation is gaining importance in Kerala, Karnataka and Tamil Nadu since early 1990s.

11.2. Economic importance

• Second most expensive spice after saffron

5.1. Origin and distribution

• True or black mustard: Brassica nigra Koch-Self sterile

• White mustard (Yellow mustard) : Brassica compestris, Syn: Sinapsis alba- Self sterile

• Indian or brown mustard: Brassica juncea (L.) Czern

• These three species are commonly used as condiment.

• White mustard is indigenous to Southern Europe, whereas brown mustard is from China introduced to Northern India.

• Black mustard is endemic in Southern Mediterranean region.

• White mustard is widely cultivated in Australia, China, Chili, Denmark, Italy, Japan, UK, Netherlands, North Africa, Canada and USA.

7.1. Pepper

7.1.1. Pollu beetle: Longitarsus nigripennis

Symptoms

• Grub feeds on growing tip, tender stem, leaf petiole, spikes and berry.

• Tunneling of tender stem causes drying up of shoot.

• Spikes tunneled by grubs turn black and cause dropping of spikes due to rotting.

• Grubs bore into the berries and feed on entire internal contents.

• Exit holes could be seen on dry berries and turn dark - called ’Pollu’ berries.

.1. Origin and distribution

• Originated from West Africa.

• Cultivated in Malaysia, Indonesia, USA, Cameroon, Cote d’Ivoire, Ghana, Liberia, Nigeria, Sierra Leone, Togo, Angola and Congo.

• Commercial scale plantation in Malaysia was found in 1917.

9.2. Economic importance

• Produces edible palm oil as well as palm kernel oil.

• Maj or constituent of oil is mono unsaturated oleic acid; rich in carotenoids.

• Unrefined palm oil is a significant source of tocotrienol, part of vitamin E.

• Oil content is 17 to 27% for palm oil, and 4 to 10% for palm kernels.

10.1. Origin and distribution

• Native to the tropical Africa and grows in the Nepal, India, Bangladesh, Sri Lanka, Cambodia, Laos, Myanmar, Thailand, Vietnam, Malaysia, Indonesia and the Philippines.

• Palm is widespread in Tamil Nadu, Kerala, Andhra Pradesh, Telangana, Odisha, West Bengal, Bihar, Jharkhand, Karnataka and Maharashtra.

• In Tamil Nadu, it is present in Tuticorin, Tirunelveli, Thenkasi, Virudhunagar, Ramanathapuram Madurai, Theni, Salem, Namakkal, Kancheepuram, Chengalpattu, Tiruvallur, Villupuram, Kallakurichi and Cuddalore districts.

• Palm is dioecious in nature.

• Palmyrah was declared as “State Tree of Tamil Nadu” by the Government of Tamil Nadu.

7.1. Origin and distribution

• Native of South East Asia, Central America.

• Mexico - largest producer of diosgenin.

• In India, it is grown in North eastern states and Goa

• Dioscorea alata and Dioscorea esculenta - edible tubers.

• Dioscorea floribunda, Dioscorea villosa, Dioscorea composita - widely grown

• Major producing countries - Mexico, Guatamala, Costa Rica, India and China.

1.1. Origin and distribution

• Native to South East Asia especially India

• In India, it is cultivated in MP, Maharashtra and AP

1.2. Economic importance

• Oil of palmarosa - rusa or rusha or rosha

• Oil obtained from C. martini var. sofia - ginger grass oil.

• Essential oil - Geraniol- East Indian Geranium.

• Motia grass - fine yellow stem with dark green leaves and height 1.80-2.40 m.

• Sofia grass - purple stem, shorter (90-120 cm)

• Used as base for fine perfumery

2.1. Origin and distribution

• Native to India and Sri Lanka.

• Widely cultivated in tropics and subtropics.

2.2. Economic importance

• Cochin grass or Malabar grass or East Indian or True Lemon grass; perennial and multi cut aromatic grass.

• Lemon like odour due to presence of 70-90% citral, a cyclic monoterpene.

• Other compounds are geraniol, citronellal etc.

7.1. Origin and distribution

• Originated in the Mediterranean basin and spread to rest of world by both natural and artificial means.

• USA - major producer of pepper mint and spear mint

• Bergamot mint - native of Europe and naturalized in eastern USA

• Grows successfully in temperate and subtropical region of India.

• India - Japanese mint - Terai region, extending to parts of Indo Gangetic plains and parts of Punjab in North-Western India.

7.2. Economic importance

7.2.1. Japanese mint or corn mint or field mint (M. arvensis), 2n: 36, 72.

2.1. Structure of fruits and vegetables

2.1.1. Fruit

• Fruit is a part of a flowering plant that derives from specific tissues of the flower, mainly one or more ovaries (Fig. 1). Plant product with aromatic flavors, which are either naturally sweet or normally sweetened before eating.

2.1.2. Vegetables

• It exhibits wide verity of plant structure like edible seeds, roots, stems, leaves, bulbs (Fig. 2), tubers and non-sweet fruits of herbaceous plants.

• Vegetables are grouped into 3 main categories

? Seeds and pods-contain natural wax coating. Eg. Many legumes

? Bulbs, roots and tubers with no coating, but tuber has suberisation

? Flowers, buds, stems and leaves having low shelf life

9.1. Principles of food preservation by heat

• Pasteurization temperature at below 100°C

• Heating at about 100°C

• Sterilization temperature at above 100°C

9.1.1. Pasteurization

• Heat treatment kills part, but not all microorganisms present and temperature below 100°C.

• Heating by means of steam, hot water, dry heat or electric current and cooled after heat treatment.

• Surviving microorganisms are inhibited by low temperature or some other preservative method, if spoilage prevented.

• Preservative methods used to supplement pasteurization include

? Refrigeration, e.g. milk

? Keeping out microorganisms usually by packaging the product in a sealed container

The word ‘horticulture’ was first conceived by Peter Laurinburg. In an English language, the word horticulture used for the first time in 1678 in a book entitled “New World of Words” by Phillips. The term HORTICULTURE is resultant of two Latin words i.e. HORTUS meaning GARDEN and CULTURA meaning CULTIVATION.

The Latin term ‘Garden’ meaning to enclose. In past, the garden had protection with with walls or other similar structures. Such protected places were used to grow fruits, vegetables, flowers and ornamental plants. When fruits are grown in a definite area, that area is called as an ‘orchard’. Thus, horticulture refers to cultivation of garden plants in protected enclosures. It is an aesthetic science deals with the garden crops. Such as growing of vegetable crops in vegetable gardens; fruit crops in fruit gardens. The most distinguished character between horticulture and agriculture is that horticulture deals with small scale gardening and usually in enclosed gardens although this is not a necessity, while agriculture is done on large scale with extensive crop cultivation.

Horticulture includes variety and diversity of crops. Thus, it can be divided into several branches depending upon the crops it deals with. Following are the branches of horticulture.

1. Pomology: The term pomology is a combination of two Latin words pome i.e. fruit and logos i.e. science. Recently it has been designated as ‘Fruit Science’. It deals with the study of fruit crops. It includes all aspects of fruit crops e.g. importance, uses, origin and distribution, area and production, soil and climate requirement, botany, nursery raising, cultivation practices, plant protection measures, stage and methods of harvesting, post-harvest handling, marketing, export, import, etc. e.g. mango, banana, citrus, grape, apple, peach, pomegranate, fig, etc.
2. Olericulture: The term olericulture is also derived from the Latin word. Cultivation of vegetable crops. Recently it has been designated as ‘Vegetable Science’. Vegetables are said to be herbaceous plants of which edible plant parts are used for consumption either cooked or salad. It may be stem, root, leaf, flower, etc. It also includes all aspects of vegetable crops e.g. importance, uses, origin and distribution, area and production, soil and climate requirement, botany, nursery raising, cultivation practices, plant protection measures, stage and method of harvesting, post-harvest handling, marketing, export, import, etc. e.g. tomato, brinjal, chilli, cucumber, red pumpkin, watermelon, cabbage, cauliflower, etc.
3. Ornamental Horticulture: It includes various groups of ornamental plants used to decorate in-door and out-door areas. Ornamental horticulture is the study of growing, arranging and tending decorative plants and flowers. It is further divided into.

The selection of the site has great importance for the establishment of a fruit orchard successfully. Establishment of orchard is a long term activity with huge investment. Hence, any mistake committed during site selection, it is difficult to rectify it later. Successful orchard is not only related with yield but also its economic production and efficient disposal of produce. For economic orchard establishment; some of the points which need to be considered, while selection of site. These are as follows.

1. Climate and soil: These are two important natural factors, which decide the success or failure of orchards. Before selection of site, climate and soil requirement for selected fruit crops needs to be studied thoroughly and accordingly site must be selected. On the other hand if a site has already been selected; then fruit crop selection needs to be done as per the existing climate and soil of that selected site.
2. Topography: Slope of site more than 15% makes the land almost unsuitable for cultivation. Land with 4% slope may be kept clean without much loss. Uneven land involves heavy expenditure in leveling. Southern slopes are generally warmer and affect the plant growth in a manner different from the northern slopes. It is due to the difference in quantum of receiving sunlight. Hence, the site with southern slopes may be selected for sun loving plants.

Fruits and vegetables are the major constituents of daily diet. They provide not only body building elements but also energy yielding food for the wellbeing of humans. Main object of the nutrition garden is to make availability of the requisite quantity of fresh fruits and vegetables to family members. It is generally raised in the backyard of home. It is also called as a home garden or kitchen garden. Most of the day to day cultural operations are performed by family members. Working in the nutrition garden during their spare time is a pleasure, an inspiration, a means of recreation to all the family members. The foremost advantage of nutrition garden is to daily supply fresh fruits and vegetables as per the needs of family members. Nutrition garden has an important role in enhancing national food security and dietary diversity to combat malnutrition.

Points to be considered, while the planning and layout of nutrition garden

The term weed can be described in many ways. In general, it is said that weed is a plant, which is not sown by the farmers or which is out of place. Weed is defined as the unwanted, undesirable plant, growing out of its proper place, which interferes with the utilization of natural resources, is prolific, persistent, competitive, harmful and even poisonous in nature and can grow in adverse climatic conditions.There are more than 30,000 species of weeds distributed world over, out of which 18,000 are noxious and cause serious losses. Around 250 species are causing serious economic losses. Weeds in orchards reduce crop yields by competing for moisture, nutrients, light and space. They also act as a host for insect pests and diseases. When they become large, they interfere with orchard operations as well as water bodies. There are some weeds, which are parasitic partially or completely on the host tree e.g. striga and loranthus, in mango.

Media for plant growth and seed germination has great significance in nursery business. It is the basic need of the propagation industry. The material for rooting and growing media may be used either alone or incorporated with one or more products in combination. The materials used for rooting media may be naturally occurring or may be manufactured artificially.

Characteristics of an ideal rooting medium: These are as follows.

1. The medium must be sufficiently firm and dense to hold the cuttings or seeds in place during rooting or germination.
2. It must retain sufficient water and air, allowing sufficient drainage.
3. It should be highly decomposed and stable.
4. It must be free from weed seeds, insect pests and diseases.
5. Acidity or alkalinity should be the optimum for different species.
6. Its volume must be fairly constant, when either wet or dry.
7. It must be capable of being sterilized.

The term micropropagtion is also known as tissue culture. Micropropagation refers to aseptic culture of various plant parts in artificial growth medium to produce new plant. This means is recently applied in propagation of horticultural crops e.g. Orchid, banana, strawberry, papaya, grape and many other plants.

Requirements for tissue culture: It includes basic facilities including equipment, asepsis, culture medium and culture environment.

• Basic facilities including equipment: Provision of working space, large sinks, washing machine to wash glassware, oven, dryers, dust free storage, space for glass house and chemicals, autoclave for sterilizing media, solutions, water culture and instruments, supply of distilled or deionized water and various essential instruments and appliances.

Facilities required for propagating many plant species by seed, cuttings, or grafting and budding include two basic units namely a structure with temperature control and ample light such as a greenhouse or hot bed where seeds can be germinated or cuttings rooted. The second unit is a structure into which the young tender plants can be moved for hardening preparatory to transplanting and cold frames or lath houses are useful for this purpose.Greenhouses: There are different types of greenhouse namely low cost greenhouse and commercial greenhouses. In all polyhouses/ greenhouses means of providing air movement and air exchange is necessary to aid in controlling temperature and humidity It is best, if possible, to have in the greenhouse heating and self-opening ventilators and evaporative cooling systems. Plastic greenhouses covered with various types of plastic film have become very popular among nursery men.