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“Tell me what you eat and I will tell you what you are. The destiny of people depends on the nature of its diet.”

A. Brillat-Savarin

Milk is the only product which is considered nature’s almost perfect food. It is treasure house of unlimited nutrients. It is considered best and ideal food by virtue of possessing almost all the nutritional factors, viz., fats, proteins, carbohydrates, minerals and vitamins. They are not only of higher quality but are present in milk in such form and proportion that their digestion and assimilation in the body is very efficient. Milk also plays a supplementary role in our nutrition. If it is included in our diet it enhances digestion and assimilation of nutrients of other food products. This is the reason that it is kept in high esteem as a food and is called the nectar for living beings.

Milk is the first taste of food for whole mankind. It establishes the mother-infant bond and is a life promoter. Of the many fluids that biology offers milk is perhaps the most versatile in terms of its use– as food, as a growth stimulant and as a defense package to the user. To the infant mammal – be it a mouse, calf or a human child, mother’s milk is more than a source of energy and nutrients. It contains a wide variety of substances that defend the growing infant against infections.

Milk, a perfect blend of nutrition and palatability, plays an important role in preserving mental and physical health. Milk has long been recognized as the most wholesome and complete single food available in nature for health and as a medicine, both preventive as well as curative. Ancient chronicles as recorded in the Upnishads, Puranas and Vedas extol the beneficial and therapeutic properties of milk and milk products. It has been stated that cow milk, dahi and ghee impart knowledge and radiance, cure heart trouble and anaemia besides other bodily diseases.

Milk is a complex colloidal dispersion, the physical and physicochemical properties of which depend on intrinsic compositional and structural factors, extrinsic factors such as temperature, and post-milking treatment.

There is no clear dividing line between physical properties and physicochemical properties. However, physical properties may be thought of as the measure of the bulk behaviour of milk and of how milk interacts with energy, while physicochemical properties are measures of how bulk behaviour and energy interactions depend on the constituent colloidal particles, molecules, atoms and ions in milk.

Knowledge of physical properties is of importance particularly in the technological and engineering design and control of milk processes and processing equipment. Knowledge of physicochemical properties provides the basis for the design of modern methods of milk analysis, determination of milk microstructures and elucidation of the complex chemical reactions that occur in milk.

In the dairy industry measurements of the physical properties of milk and milk products are made to secure data necessary for the design of dairy equipment (e.g., heat conductivity and viscosity) to determine the concentration of a component (e.g., specific gravity to estimate solids-not-fat or freezing point to determine added water), or to assess the extent of a physical or chemical change (e.g., titratable acidity to follow bacterial action or viscosity to assess aggregation of protein micelles or fat globules). The great advantage of physical measurements for such purposes is their speed and simplicity as well as their potentialities for automation.

Use of physical property to measure concentrations or changes in degree of dispersion demands knowledge of the contribution of the several components to that property. Furthermore, the natural range of variation of the property in milks or products is of major interest. The precision and suitability of possible methods of measurement are also of prime importance.

Growth of a microorganism implies an increase in amount of protoplasm, formation of new structures and eventually formation of new cells. Balanced growth means cell components increase in proportion to each other and unbalanced growth means cell components increase in a non constant relationship to each other

Microbial growth and growth curve

Phases of growth

When bacteria are grown in the laboratory in liquid medium, the medium becomes cloudy or turbid. It is possible to measure the increase in numbers of bacteria at various time intervals and plot the values on a graph representing a growth curve.

Lag Phase: When cells are first inoculated into fresh medium containing all the nutrients they require, they take a short time to adapt before they start to divide. This is termed the lag phase.

R - Enamel can: The acid resistant, gold coloured enamel treated can are called R enamel cans. It is used for canning of acidic food which have soluble colouring pigments.

R factor: It is a group of genes present in some bacteria that provide a basis for resistance to antibiotics and can be transferred from cell to cell by conjugation.

R value: R value is a measure of resistance to the flow of heat through a given thickness of a material (insulation) with higher numbers indicating better insulating properties.

Rabbitto and putridity: The surface taint of the milk caused by Pseudomonas putrefaciens is called rabbitto and putridity.

Racking: An important operation for the wine production which wine is siphoned off or bottom of the vat) and is transferred to a fresh vat with the help of a false bottom. Racking is repeated decanting to remove the slowly setting cloud of the freshly fermented young wine. It is also called clarification. It is synonym to siphoning.

Rad: It is the unit of radiation dose being equivalent to the absorption of 100 erg/g of irradiated material.

Spices play important roles in daily life and India is a rich repository of spices. Various biotechnological approaches like micropropagation, somaclonal variation, in vitro conservation, synseed technology, protoplast fusion, production of flavor and coloring components, and development of novel transgenics have great significance in conservation, utilization and increasing the production and productivity of spices. Protocols for micropropagation and production of disease free planting materials are available for many spices. Efficient plant regeneration protocols are also available for exploiting somaclonal variation ,where the available natural variability is relatively low. Technologies for isolation and culture of protoplasts were reported in a few spices. Development of transgenics for disease resistance is gaining momentum. Synseed and Micro-rhizome technology are also available for many spices for safe propagation, conservation, movement, and exchange of germplasm. In vitro and cryo preservation technologies for conservation of spices germplasm are available for many spices.

Sterilization is defined as the process by which an article, surface or medium is freed of all living microorganisms either in the vegetative or spore state.

Disinfection means the destruction or removal of all pathogenic organisms, or organisms capable of giving rise to infection. Chemical disinfectants which can be safely applied to skin or mucous membrane and are used to prevent infection by inhibiting the growth of bacteria are called antiseptics.

Five main methods are used for sterilization. 1. Red heat (flaming) 2. Dry heat (hot air) 3. Moist heat 4. Filtration 5. Radiation.

The killing effect of dry heat is due to protein denaturation, oxidative damage and toxic effect of elevated levels of electrolytes. The lethal effect of moist heat is due to the denaturation and coagulation of protein. In the case of spore, steam condenses on it, increasing its water content with ultimate hydrolysis and breakdown of the bacterial protein.

The fruits and vegetables are highly perishable in nature. The losses in harvested fruits and vegetables start immediately after harvesting and the resulting spoilage caused by biochemical changes (enzymatic) and activity of microorganisms such as bacteria, moulds and yeast. The losses caused by the microorganism in fruits and vegetables products can be prevented by controlling or destroying these organisms in order to preserve fruits and vegetables by processing and preservation means. The processing and preservation is one of the most important activities among various types of activities of Horticultural Science.

Processing: The processing can be defined as an activity, which is performed to maintain or improve the quality or to change the form or characteristics of the product. Processing operations are undertaken to add value to horticultural produce after their production. The main purpose of processing is to minimize the qualitative and quantitative deterioration of produce after harvest.

Preservation: Preservation can be defined as the science which deals with the methods of prevention of decay or spoilage of produce and allow it to be stored in a fit condition for future use.

Fruits and vegetables can be preserved for short and long term. For short term preservation can be achieved by proper handling of produce and low temperature storage. Long term preservation can be achieved by canning, drying and dehydration, fermentation and by using chemical preservatives.

INTRODUCTION

The state of Manipur is located at the easternmost border of India and is characterized by flat valleys comprising of four valley districts (Bishnupur, Imphal East, Imphal West and Thoubal) surrounded by five mild to steep slope hill districts (Chandel, Churachanpur, Senapati, Tamenglong, and Ukhrul). The state is geographically bordered by Nagaland in the north, Burma in the east, Mizoram in the south and Assam in the west. The total geographical area of the state is 22, 327sq. km divided into 20, 089sq. km in the hills and 2, 238sq. km. in the valley. More than 98% of the population in the hill is in rural areas whereas around 60% of the population in the valley is in rural and around 40% are in the urban areas.

The AAS Unit, Imphal is located at 24045' N latitude, 93054' E longitude at an altitude of 774m above msl. The agro-climatic zone of the state covers sub tropical plain zone, sub tropical hill zone, temperate hill zone and sub temperate zone.

INTRODUCTION

It is well accepted that the climatic changes also influence the geomorphic process efficiency and landform development (Ahamad, 1985). Glaciation, sea level changes, flooding and many other geo- environmental events are related with global and regional climatic changes along with tectonic and other non-tectonic factors like natural vegetation, soil, organic development etc. Considering the role of climate on landform development and dynamics of the Late Quaternary climate, a climato-geomorphic study was conducted on the coastal and paleo-coastal areas of the Bengal Basin namely-lower Western (West Bengal coast) and Eastern (Tripura Paleo-coastal Fold Belt Province) Geo-provences. The main objectives of the study were to investigate (i) Development of the landforms during Late Quaternary period with sea level changes and (ii) Climatological influences on the landform modifications.

Introduction
Many chemical substances are added to the food for functional purposes and in many cases, these are found to occur naturally in some foods. When these substances are added to the foods, they are known as food additives. An additive is defined as a substance or mixture of substances other than basic food ingredients that are present in a food as a result of any aspect of production, processing or packaging. Additives may be intentional as well as unintentional. Intentional additives are substances deliberately added to perform a specific function and to increase the shelf life of the products while unintentional additives have no intended function in the finished product but become part of that particular product. The food additives having significance in fruit and vegetable preservation and their mode of action are discussed as under:
Objectives of adding an additive
1. To reduce wastage and improve keeping quality e.g., the addition of potassium meta-bisulphite in squashes, benzoate in sauces, sodium propionate in bread and sorbic acids in cheese etc.,
2. To improve and maintain nutritive elements e.g., addition of vitamins for enrichment, addition of vitamin D to milk, addition of iodine to salt etc.
3. To enhance the quality and consumer acceptability of the product e.g., the addition of colouring agents, emulsifiers, thickeners etc.
4. To facilitate the preparation of foods e.g., the addition of acid to beverages, sugar in jams, jellies etc.

Agro processing involves a diverse range of unit operations aimed at converting raw agricultural products into value-added goods. These processes serve to enhance the shelf life, quality, and overall appeal of agricultural commodities while also boosting their nutritional content and market value. The unit operations employed in Agro processing are determined by the specific characteristics of the product and the desired outcome. Common steps include cleaning, sorting, peeling, grinding, and milling. Preservation methods such as blanching, fermentation, drying, and freezing play a crucial role in preparing products for consumption or further manufacturing. Furthermore, operations like extrusion, canning, juicing, and packaging are essential for producing a variety of processed food items, while proper storage and warehousing ensure the long-term availability and sustainability of these goods. Each unit operation is designed to contribute toward creating high-quality, market-ready products, minimizing waste, and ensuring optimal utilization of raw materials. By combining these processes effectively, Agro processing maximizes the potential of agricultural resources and strengthens the overall food industry.
OVERVIEW OF MATERIAL HANDLING
Materials handling encompasses a broad spectrum of activities, including mechanical harvesting on farms, transportation of live animals, refrigerated transport of perishable goods, and pneumatic conveying of flour from rail cargo to bakery storage facilities. It is important to minimize product losses during these operations while maintaining the quality of raw materials, such as preserving vitamin content and physical appearance, ensuring sanitary conditions, reducing bacterial growth, and optimizing the timing of transfers to avoid delays that could compromise both the economy and product quality. The journey of agricultural produce from farms to processing areas often results in significant transformations. For instance, grapes are transported via tractors, trucks, or trailers to juice plants or wineries, where they are graded, washed, and processed further. However, there are limitations on the size of transport vehicles and the duration fruits and vegetables can be held. Since these are living, respiring products, prolonged storage can increase batch temperatures to levels that encourage spoilage.

Leguminous vegetables include peas, French bean, Lima bean, broad bean, cowpea, hyacinth bean, winged bean etc. They belong to the family Fabaceae (Syn. Leguminosae). These are cultivated either as sole crop is sometimes as intercrop. In some areas they are used in backyard cultivation also. Most of them are short duration crops and are self pollinated.

8.1. Peas (Pisum sativum L.)

The pea (Pisum sativum L.) is a very common nutritioius vegetable grown in cool season throughout the world. It belongs to the family Fabaceae (Syn. Leguminaceae) and genus Pisum. A pea is most commonly the small spherical seed or the seedpod of the pod fruit Pisum sativum L. The pea cultivars are grouped into several groups based on shape of seed, plant height, maturity and use of pods. This crop is cultivated for its tender and immature pods for use as vegetable and mature dry pods for use as a pulse. In both the cases the seeds are separated and used as vegetable or pulse. The central Asia is regarded as the place of origin for all legumes including pea. Based on the genetic diversity, Central Asia, the Near East, Abyssinia and the Mediterranean is considered to be its centre of Origin. Cultivated garden pea is not seen in wild state and it might have been originated from wild field pea or other related species. In India it widely cultivated states of Uttar Pradesh, Bihar, Haryana, Punjab, Himachal Pradesh, Orissa and Karnataka. Followed by Madhya Pradesh, Himachal Pradesh, Assam and Jharkhand.

Cultivars/Varietie: Peas varieties are grouped based on maturity (early, mid season and late) plant height (Bush or dwarf, medium tall and tall). The major cultivars under cultivation in different parts of the country are Arkel, Bonneville, Harbhajan, FC-1, Arka Ajit, UN 53-6 (whole edible type), Jawahar Matar 1, Jawahar Matar 2, Jawahar Matar 3, Jawahar Matar 4, Jawahar Matar 5, Jawahar Peas 83, JP 4 (JM 6), JP 19, Lincoin, Mattar Ageta 6, Pantnagar Matar 2, Pant Uphar (IP 3), P 88, PRS 4,Ooty-1 and VL 3.

9.1. Onion (Allium cepa L.)

The onion (Allium cepa), which is also known as the bulb onion, or common onion is the most widely cultivated species of the genus Allium. It has been used as food since time immemorial and is an important vegetable all over the world. The genus Allium also contains a number of other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion (A. fistulosum), Egyptian onion (A. proliferum), and Canada onion (A. canadense). The vast majority of cultivars of A. cepa belong to the “common onion group” (A. cepa var. cepa) and are usually referred to simply as “onions”. The Aggregatum Group of cultivars (A. cepa var. aggregatum) includes both shallots and potato onions. Onion is suggested to have been originated in Asia, particularly Pakistan and Iran.

China is the largest onion producer in the world followed by India. Largest area under onion is in India followed by China. The major onion producing state are Maharashtra, Karnataka, Madhya Pradesh, Rajasthan, Gujarat, Bihar, Andhra Pradesh, Tamil Nadu and Orissa.

Cultivars/Varieites: Onion varieties differ in size, colour of skin, pungency and maturation. The most popular varieties under cultivation are Agrifound Dark Red, Agrifound Light Red, Agrifound Red, Agrifound Rose, Arka Bindu, Arka Kalyan, Arka Niketan, Arka Pragati, Baswant 780, Brown Spanish, Co-1, Co-2 Co- 3, Co-4, Early Grano, Hisar II, Kalyanpur Red Round, MDU 1 N-2-4-1, N-53, N-257-9-1, Punjab 48 (S 48), Pusa Madhavi, Punjab Red Round, Punjab Selection, Pusa Ratnar, Pusa Red, Pusa White Flat, Pusa White Round, Udaipur 101, 102 & 103.

Food processing is a fundamental component of the food industry that transforms raw materials of plant and animal origin into safe, nutritious, convenient and value-added products. This chapter introduces the basic concepts and evolution of food processing, tracing its development from traditional practices to modern technologies driven by consumer demand. It explains the major purposes of processing, including shelf-life extension, food variety, safety and preservation of nutritive value. The chapter also examines primary, secondary and tertiary processing and discusses the effects of processing on macronutrients and micronutrients. Understanding these fundamentals provides a foundation for evaluating conventional and emerging food-processing technologies.

Supercritical Fluid Extraction (SFE) is an advanced extraction technology that provides an efficient and comparatively sustainable alternative to conventional solvent-based extraction. This chapter introduces the fundamental principles of supercritical fluids and explains the mechanism by which desirable compounds can be selectively extracted from food materials. It examines the use of SFE for recovering aroma compounds, essential oils, flavours, pigments, colours, antimicrobial compounds and valuable bioactive substances. Particular emphasis is placed on obtaining high-purity extracts while minimizing toxic solvent residues. The chapter also discusses industrial food applications, process advantages and limitations, highlighting the potential of SFE for developing cleaner, efficient and value-oriented food-processing and ingredient-recovery systems.

Onion is an economically significant bulb crop cultivated across diverse agroecological environments. Its cultivars vary considerably in bulb size, shape, colour, pungency, maturity, storage behaviour and photoperiod response. Understanding its vegetative and reproductive morphology, growth habit, physiology and taxonomic relationships is fundamental to crop improvement and germplasm conservation. This chapter examines the botanical features and taxonomic position of onion within the genus Allium. It explains relationships among cultivated types, landraces and allied species and discusses varietal classification according to climatic adaptation and consumer preference. Classical characterization and molecular taxonomy are considered important tools for developing productive, resilient and market-preferred onion cultivars.

Conventional fertilizers often exhibit low nutrient-use efficiency, resulting in nutrient losses, soil degradation, water contamination and unnecessary production costs. Nano-fertilizers offer controlled and targeted nutrient delivery through formulations engineered at the nanoscale. Their high surface-area-to-volume ratio can improve nutrient availability, plant uptake, growth, bulb quality and storage performance while reducing conventional fertilizer requirements. This chapter explains the nature, modes of action and potential benefits of nano-fertilizers in onion production. It also considers nano-biofertilizers, smart nutrient-delivery systems and nano-sensors. Particular attention is given to manufacturing cost, nanotoxicity, effects on soil microorganisms, farmer accessibility and the need for standardized safety and regulatory frameworks.

Precision farming manages spatial and temporal variability within fields through targeted, data-driven interventions. Onion is particularly suited to precision management because its productivity and quality are sensitive to moisture, nutrients, environmental stress, pests and diseases. This chapter describes applications of GIS, GPS, variable-rate technology, IoT, cloud platforms, drones, remote sensing, multispectral imaging, smart sensors, artificial intelligence, automated systems and crop-response models. These technologies support soil assessment, field preparation, irrigation, fertilization, crop monitoring, stress detection, protection, yield estimation, harvesting and storage. Their potential to reduce input waste and improve profitability is considered alongside constraints involving investment costs, technical knowledge, connectivity, accessibility and data privacy.

Ginger is used extensively as a spice in cuisines throughout the world. Ginger belongs to Zingiberaceae family and an English botanist William Roscoe (1753-1831) gave this plant the name Zingiber officinale in the year 1807. The name of the genus Zingiber derives from a Sanskrit word denoting “horn shaped” in reference to the protusions on the rhizomes (Ghosh et al., 2011). It is an oldest rhizome widely domesticated as a spice where the edible part is the swollen underground stem or rhizome. The Zingiberaceous plants have strong aromatic and medicinal properties and are characterized by their tuberous or non-tuberous rhizomes (Chen et al., 2008). Ginger is a medicinal plant that has been widely used all over the world, since antiquity, for a wide array of unrelated ailments including arthritis, cramps, rheumatism, sprains, sore throats, muscular aches, pains, constipation, vomiting, hypertension, indigestion, dementia, fever and infectious diseases (Ali et al., 2008). Ginger has direct anti-microbial activity and thus can be used in treatment of bacterial infections (Tan and Vanitha, 2004).

The design and structure of a warehouse should facilitate proper ventilation, temperature control, and protection from pests. This includes features like smooth floors, durable walls, and proper drainage systems to prevent water accumulation. The warehouse should also be insulated to protect stored goods from extreme temperatures and humidity fluctuations.
Regular maintenance is essential to keep the warehouse in good condition. This involves routine checks for structural integrity, such as inspecting for cracks, leaks, or signs of pest infestation. Equipment like ventilation fans, conveyors, and lighting should be regularly serviced to ensure optimal functioning.
Sanitation and hygiene are equally important in preventing contamination and pest issues. The warehouse should be thoroughly cleaned to remove any dust, dirt, or residues that could harbor pests or mold. All surfaces, including walls, floors, and storage bins, should be disinfected regularly. Proper waste disposal systems should be in place, and areas where food products are stored should be kept free from garbage or organic waste that could attract pests. Ensuring a clean and well-maintained warehouse helps preserve the quality and safety of stored goods.
SELECTION OF STORAGE TYPE
Some basic Guildelins or Principles are Given as Follows:
ROUND OR RECTANGULAR STORAGE
In terms of structural cost per tonne of storage, round storage buildings are generally more cost-effective than rectangular ones. The reasons for this are straightforward: