eChapters

Fruit cracking is an important physiological disorder found in some commercial cultivars of Bael (Aegle marmelos), which occurs just before the ripening stage. It is correlated with abrupt changes, such as temperature and humidity, in weather conditions. Heavy irrigation or precipitation is also one of the causes of this disease after prolonged drought.

Abstract

Molecular modeling is a computational technique used to simulate the three-dimensional interactions between atoms and molecules. It allows for the visualization, manipulation, and prediction of molecular structures and chemical reactions. In this chapter, we discuss the different types of molecular models used in computational chemistry, including ball-and-stick models, space-filling models, wireframe models, and ribbon models. Ball- and-stick models depict atoms as spheres and bonds as sticks. Molecular modeling has numerous applications in drug discovery, materials science, and other fields of research, making it a valuable tool for computational chemists and molecular biologists. Here, this chapter focuses on different types of molecular models.

To explain the main concepts and elements of a participatory curriculum development process

To present practical skills and knowledge leading to the effective design of teaching and learning

To build confidence of the learners in applying new methods and approaches to teaching and field extension work.

To demonstrate application of participatory approach in development of Extension curriculum

This Toolkit emphasizes an active learning approach, based on the process of experience, reflection and action. The key principle is that people do not learn simply by passive listening. They need to be involved from beginning of the training and designing of the program.

The hybrid breeding program in pigeonpea is unique and the first among the food legume. The concept of hybrid in this crop was conceived in 1974; and it is based on a small window of natural out-crossing present in the crop. This natural out-crossing in pigeonpea is mediated by a range of flying insects, which forage on large bright colored flowers of the crop in search of nectar and in the process affect the cross-fertilization. In the last 40 years a lot of basic and applied research has been successfully completed and over 50 research papers have been published in national and international journals of repute. A coordinated effort of scientists of different institutions has led to the release of two hybrids, one for central and another for peninsular zone of India.

Progeny test

Progeny trials involve large numbers of progenies of a family type, such as full-sib, half-sib, or S1 lines. The progenies are evaluated to identify those that may be used to generate synthetic or experimental varieties, or recombined to form an improved population in a recurrent selection program. Progenies in the trials are normally a random sample from the particular population under study. Therefore, data obtained from progeny trials may be used to estimate genetic variances and covariances from which heritability estimates, predicted responses to selection, genetic correlation coefficients, and correlated responses to selection may be obtained. Progeny trials are normally researcher-managed. Progeny trials involve complex field designs, such as balanced incomplete block, lattice, and alpha-lattice. Some examples of lattice are 11 × 11 for 121 progenies, 14 ×14, 16 × 16, etc. Because of the large number of entries, single-row plots with only 2–3 replications in a few environments are used in progeny trials.

Objective: To study the planting and stand management practices of Kala Shisham (Dalbergia latifolia).

Observation recording: Students are advised to visit the shisham plantation or forest for seed collection then sowing the seeds in nursery and record the various nursery practices and conduct tending operations in shisham plantation.

Real benefits are obtained when we use a participatory approach to curriculum development and reorientation. Primarily, the course contents we provide and the learning will become more effective. If students participate actively in the learning process, then they are more likely to learn and teaching is more likely to be effective. They will have more ownership in the teaching, because their needs will have been identified and hopefully they will also be involved in deciding how their needs can be met. This will increase their motivation, which will help them to learn more effectively.

Chlamydiosis

Chlamydiosis is an infectious disease of animals caused by Chlamydia sp. and characterized by encephalitis, polyarthritis and pneumonia in calves and abortions in cows and sheep.

Etiology

• Chlamydia psittacii

Pathogenesis

Chlamydial infection spreads through inhalation of contaminated dust from infected birds. Organism multiplies in lungs and through blood it spreads to liver, spleen, kidneys, brain, joints and placenta to cause pathology.

Characteristic symptoms

Calves

• Fever, dyspnoea

• Nasal discharge, hypersalivation

• Swelling of joints

Transfer 1.5 mL overnight culture to a 1.5 mL microfuge tube, centrifuge for 30 sec, and decant supernatant.

Resuspend cells in 400 µL TE by vortexing, add 50 µL 10% SDS, 50 µL proteinase K (20 mg/mL in TE). Incubate for 1 hour at 37^oC.

Shear DNA by 3-5 passages through a 26 G needle.
Extract twice with 500 µL phenol: chloroform (1:1), and twice with 500 µL chloroform. 
Precipitate nucleic acids by adding 25 µL 5 M NaCl and 1 mL 95% EtOH, vortex, and centrifuge for 10 min, decant supernatant. Dry pellet.

Spraying nozzle is a device for emitting spray liquid, breaking it up into small droplets and throwing the droplets away from the nozzle orifice. Different designs of nozzle are used to produce appropriate droplet size spectrum. In order to break the liquid into droplets energy is needed. The spray nozzles therefore are classified as:

Observation recording: Students are advised to visit the Sandalwood plantation or forest for seed collection then sowing the seeds in nursery and record the various nursery practices and conduct tending operations in Sandal wood plantation.

In the present system of curriculum changes, participation of all the stakeholders are not actively involved in developing curriculum over the years.

Sciarid(mushroom flies): Bradysia paupera, Lycoriella auripila: Sciaridae

The larvae feed on the mycelial attachments and restrict the growth of the spawn. The maggots also feed on the developing mushrooms or pinheads and thus cause loss in yield. They also bore the developing mushrooms and render them hollow.

Introduction

A downer cow is an animal In sternal recumbency and isn’t showing obvious clinical sign of hypocalcemia,hypomagnesmia or any limb or spinal Injury. Most causes are related to parturition, occurring in few days before or upto a week after calving.

Causes for Making an Animal Downer

Animals Inability to stand may be caused by illness or injury. Following may be the reasons

The defined endocrine glands include the pituitary gland, the pineal gland, the adrenal glands, the thyroid gland and the parathyroid glands. The organs which contain groups of endocrine cells include the pancreas, the testis, ovary and placenta. The Hassall's corpuscles of thymus secrete hormone which contributes to the maturation of T-lymphocytes. Hence the thymus can be considered as having an endocrine function.

Pituitary : Refer to Part II, Chapter 2

Thyroid gland : Refer to Part II, Chapter 2

Pineal gland (Epiphysis cerebri) : Develops as a dorsal neuro epithelial diverticulum of the caudal part of the roof of the diencephalon. After its formation the gland remains attached to the diencephalon by a stalk. The neuroepithelial cells differentiate into pinealocytes and glial cells. The developing gland is surrounded by a thin layer of piamater.

1. Botanical Name : Prunus persica Batsch

2. Family : Rosaeceae

3. Common Name : Wild peach

4. Name in Indian languages

Kateru, Katakiaru (Himachali), Kathu aru (Kumaoni).

5. Description

The wild peach is closely related to cultivated peach. Many wild forms of peach are found in Himalayan hills. The most distinguishing feature of this form is the very late ripening of its fruits. The fruits of this wild plant ripen at some places as late as October. The fruits are smaller than cultivated varieties and bitter and acidic in taste.

6. Origin and distribution

The peach is native to himalayan region. These wild peaches are found in plenty in the Solan, Sirmur and Simla Districts of Himachal Pradesh. The plants are also found Kumaon and Garhwal divisions of Uttarakhand.

The normal blooming stem on the greenhouse rose has fully developed sepals, petals and reproductive organs. The inability to build a bloom at the apical end of the stem is a typical phenomenon which in such shoots is termed blind. There are sepals and petals; however, they are not complete or aborted in the reproductive portions.