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Books > Professional & Technical > Agriculture & farming > Agricultural engineering & machinery
This book examines and evaluates the performance of four standard
chisel plough tines: heavy duty, double heart, double heart with
wings and duck foot, which were connected with a rigid shank.
Experiments were conducted in a soil bin filled with sandy loamy
soil, and the experimental factors included varying operation
conditions (speed and depth) and their dependency upon a draft
force and their components (horizontal and vertical force),
specific force (force per unit area), specific power (power per
unit area), soil loosening percentage (above and below the original
soil surface) and soil profile parameters (e.g. furrow height,
furrow width, ridge height, area of ridge and furrow etc.). The
evaluation involved developing regression equations based on
Glancey and Upadhyaya's model by adding new terms related to the
tine geometric parameters or by adding a dummy term variable. These
two techniques made up the general study parameters and had the
same trend effect on operation conditions to compare between tines.
Lab results such as force components and the width of furrow were
verified in a field test. Furthermore, a model to predict the draft
force by using principles of soil mechanics and soil profile
evaluation was designed.
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Flowing Wells
(Hardcover)
Kevin Daily, Marie Daily
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R822
R676
Discovery Miles 6 760
Save R146 (18%)
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Ships in 10 - 15 working days
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This book targets the issue of water scarcity in Egypt as a typical
example of the world water crisis. Today, the available water
resource is facing its limit because of rapid increase in water
demand as a result of population growth and changes in peoples'
life-style. The basic idea to solve the problem of water scarcity
is that the irrigation sector, the biggest user of water, should
increase water use efficiency. However, the real problem is how
this can be achieved in view of the crucial need for water in this
sector. This book addresses this challenge through case studies
from the Nile delta in Egypt. The water problem in the Nile delta,
the major source for water in Egypt, is discussed in this book from
all its various aspects. This book covers the situation before and
after the advent of the Aswan High Dam, so that the reader
understands the entire development. Another special feature are the
extensive and scientific descriptions of contemporary topics in
water and agriculture, especially from the viewpoint of water
saving and sustainability. These descriptions are based on field
experiments and surveys in a six-year international research
project. Topics of this book are local, but their implications are
global.
This book develops and presents a conceptual model for
sustainable-groundwater irrigated agriculture. The model is based
on the general principles of the economic theories of cost-benefit
relations and behavioral models of resource use. The study has
evaluated the advances in tubewell farming and the aquifer
potential in arid Balochistan over a period of three decades. It
has analyzed the booms and busts of the farming over time taking
into consideration the local aquifer limitations and the
socio-political considerations and policy framework. Three data
sets - farmers, expert officials and satellite images - have been
used to aid validation. By observing the most vital parameters, the
study has concluded that the local aquifer has been falling at a
rate directly proportional to the growth rate of irrigated farming,
suggesting the current development process is unsustainable. For
instance, the research finds that tubewell bores have reached down
to depths where the term "aquifer mining" applies; as a result,
irrigation costs have become too high to allow farming to be
economically viable. In addition, desertification is steadily
encroaching and the cropping pattern being changed from high-value
horticulture to subsistence cropping. The study has also set
parameters for assessing the willingness of farmers to accept
modern, sustainable strategies and interventions.
The book "Agricultural Engineering: Gate Solved Papers" humbly
circumscribes the eight years solved papers of GATE (Graduate
Aptitude Test in Engineering) Agricultural Engineering examination.
The book will be suitable enormously to the aspirants preparing for
GATE examination. Solved papers of 2007 to 2014 have been given in
the book to familiarize the aspirants with the current trends of
questions asked in GATE Agricultural Engineering Examination. Past
year papers enlighten the students and tune up their vision. Their
contribution is really great and graceful for the students, to have
an idea of the exam pattern. Therefore, attempts have been made to
present the book in self- study format. The book is written in
simple language and is divided into various s, so that students can
prepare according to the syllabus.
This book takes stock of micro irrigation systems (MIS), the
technological intervention in India's agricultural and water
management sectors, over the past couple of decades. Based on
empirical research from the major agriculturally dynamic states,
viz., Gujarat, Rajasthan, Maharashtra, Tamil Nadu, Andhra Pradesh
and Karnataka, the book provides a nuanced understanding and
objective assessment of the implementation and adoption of MIS
across these states. It addresses several of the questions related
to adoption and impacts of MIS in India. On the adoption side, the
key question that the book addresses is which segment of the
farming community adopts MIS across states? The impacts analysed
include those on physical, agronomic and economic aspects. At the
macro level, the question being asked is about the future potential
of MIS in terms of saving water from agriculture and making more
water available for environment. The book also addresses the
question of the positive/negative externalities and real social
benefits and costs from the use of MIS, a major justification for
heavy capital subsidies for its purchase by farmers. It also brings
out certain critical concerns pertaining to MIS adoption, which
need to be addressed through more empirical research based on
longitudinal panel/ cross sectional data. The book would be of
great use to researchers (agricultural water management, irrigation
economics), students of water resource engineering, irrigation
engineering and water resources management, as well as to policy
makers and agricultural water management experts - national and
international.
As global pressure on water resources intensifies, it is essential
that scientists understand the role that water plays in the
development of crops and how such knowledge can be applied to
improve water productivity. Linking crop physiology, agronomy and
irrigation practices, this book focuses on eleven key fruit crops
upon which millions of people in the tropics and subtropics depend
for their livelihoods (avocado, cashew, Citrus spp., date palm,
lychee, macadamia, mango, olive, papaya, passion fruit and
pineapple). Each chapter reviews international irrigation research
on an individual fruit crop, identifying opportunities for
improving the effectiveness of water allocation and encouraging
readers to link scientific knowledge with practical applications.
Clearly written and well illustrated, this is an ideal resource for
engineers, agronomists and researchers concerned with how the
productivity of irrigated agriculture can be improved, in the
context of climate change, and the need for growers to demonstrate
good irrigation practices.
The book is a realistic blend of basic knowledge and understanding
in soil physical properties. It will enable the reader to
scientifically analyze soils to develop practical and successful
means of providing sufficient drainage and to develop science-based
irrigation strategies. Only basic mathematical knowledge is
necessary to understand and apply the proven principles covered.
With limited resources that are increasing significantly in costs,
the book blends the ideal concept of providing sufficient drainage
and irrigation based on using soil physical properties but with
financial limitations in mind. One traditional problem with many
Soil Physics, Drainage, and Irrigations-based texts is the
prerequisite of understanding complicated calculus-based
mathematics. Although necessary for a theory-based text, our text
was developed with practitioners in mind where such complicated
mathematics was avoided but referenced if the reader wishes to
further explore the specific topic. Another problem with many
traditional texts is the lack of practical examples or case-studies
allowing readers to relate their specific scenarios to similar
types of situations. We have purposely included numerous examples
and practical field experiences. This is especially true when many
of the theoretical ideals are covered, followed by explanations of
how such ideals can be applied in the laboratory and field.
The typical image of the Gezira Scheme, the large-scale irrigation
scheme started under British colonial rule in Sudan, is of a
centrally planned effort by a central colonial power controlling
tenants and cotton production. However, any idea(l)s of planned
irrigation and profit in Gezira had to be realized by African
farmers and European officials, who both had their own agendas.
Projects like Gezira are best understood in terms of continuous
negotiations. This book rewrites Gezira's history in terms of
colonial control, farmers' actions and resistance, and the broader
development debate.
Chris has tried to show the tractors carrying out a wide range of
tasks. His concise text explains what is going on in the pictures.
He includes some basic technical specifications such as power
outputs so that the reader can roughly compare different tractors
and have an idea of the size and capability of each. The 41
tractors chosen come from 25 marques. Many of the tractor
manufacturers have parent companies, some of which own a number of
tractor makers. Chris gives these details as well as the country of
assembly and/or manufacture. Tractor enthusiasts will enjoy this
book, but it is particularly designed to be an introduction for
visitors to rural shows, farm parks and country bookshops.
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