Early Agrometeorological Crop Yield Assessment

Early Agrometeorological Crop Yield Assessment
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
Total Pages: 164
Release: 1986
Genre: Technology & Engineering
ISBN: 9789251024195

Diverse meteorologische en hydrologische meetgegevens en cijfers van gewasopbrengsten uit verschillende landen worden weergegeven en in relatie tot elkaar gebracht om tot richtlijnen voor opbrengstvoorspelling te komen, in het bijzonder voor de ontwikkelingslanden

Understanding Options for Agricultural Production

Understanding Options for Agricultural Production
Author: G.Y. Tsuji
Publisher: Springer Science & Business Media
Total Pages: 405
Release: 2013-03-14
Genre: Science
ISBN: 9401736243

The first premise of this book is that farmers need access to options for improving their situation. In agricultural terms, these options might be manage ment alternatives or different crops to grow, that can stabilize or increase household income, that reduce soil degradation and dependence on off-farm inputs, or that exploit local market opportunities. Farmers need a facilitating environment, in which affordable credit is available if needed, in which policies are conducive to judicious management of natural resources, and in which costs and prices of production are stable. Another key ingredient of this facilitating environment is information: an understanding of which options are viable, how these operate at the farm level, and what their impact may be on the things that farmers perceive as being important. The second premise is that systems analysis and simulation have an impor tant role to play in fostering this understanding of options, traditional field experimentation being time-consuming and costly. This book summarizes the activities of the International Benchmark Sites Network for Agrotechnology Transfer (IBSNAT) project, an international initiative funded by the United States Agency for International Development (USAID). IBSNAT was an attempt to demonstrate the effectiveness of understanding options through systems analysis and simulation for the ultimate benefit of farm households in the tropics and subtropics. The idea for the book was first suggested at one of the last IBSNAT group meetings held at the University of Hawaii in 1993.

Experimental Agrometeorology: A Practical Manual

Experimental Agrometeorology: A Practical Manual
Author: Latief Ahmad
Publisher: Springer
Total Pages: 159
Release: 2017-12-05
Genre: Technology & Engineering
ISBN: 3319691856

The book is a practical manual which has been created to support the syllabus of agro-meteorology courses specifically designed for graduate and post-graduate students. The topics covered in the manual include working with meteorological instruments for measurement of various meteorological parameters like temperature, humidity, sunshine hours, precipitation, etc. Separate chapters have been included for computation of growing degree days, agro-climatic zones, crop modelling and agro-advisory services. The book will have great appeal to students of agriculture, horticulture, and forestry.

Soil Moisture

Soil Moisture
Author: U. S. Division of Agricultural Soils
Publisher: Forgotten Books
Total Pages: 32
Release: 2017-11-19
Genre:
ISBN: 9780266807797

Excerpt from Soil Moisture: A Record of the Amount of Water Contained in Soils During the Month of July, 1895 It will be seen that the soils differ very markedly in their texture. The truck soils of the Atlantic Coast contain from 1 to 10 per Cent of clay. As a rule, the less clay they contain the earlier the crops mature, which is the most important element in truck farming. A soil con taining between 4 and 5 per cent of clay, as shown in this sample, is an average truck soil adapted to any Of'the usual truck crops. The truck soils, as a rule, consist of from 70 to 85 per cent of the different grades of sand. The finest tvpe of grass land In the Eastern States, on the other hand, contains a very much larger percentage of clay. It contains not more than 5 or 10 per cent of the various grades of sand and from 28 to 50 perc cent of clay. On account of this marked difference in the texture of these soils, they maintain, even with the same rainfall, very different conditions of moisture, and this adapts them to different classes of crops. The trucking interest depends upon the early maturity of vegetables and small fruits, so that they can be put upon the market before there is competition from other soils of the State. It is carried oii under a very intense system of cultivation. The value Of the truck crops of Maryland is about equal to the value of the wheat crop and nearly equal in value to the corn crop, but the truck farming is confined to a narrow belt of land along the coast and Chesapeake Bay, and in the aggregate there is not more than one-tenth of the corn acreage devoted to this interest. This is without considering the market gardening around the larger cities and the production of fruits, which would very materially increase the relative importance of this class of agricultural crops without greatly extending the acreage. These truck soils do not yield as much per acre nor is the quality Of the crops produced as fine as on the heavier soils of the State, but vegetables can be forced to mature early and be placed upon the market during the winter and early spring months sometime before they can be matured upon the heavier soils. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Deficit Irrigation Practices

Deficit Irrigation Practices
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
Total Pages: 116
Release: 2002
Genre: Technology & Engineering
ISBN: 9789251047682

In the context of improving water productivity, there is a growing interest in deficit irrigation, an irrigation practice whereby water supply is reduced below maximum levels and mild stress is allowed with minimal effects on yield. Under conditions of scarce water supply and drought, deficit irrigation can lead to greater economic gains than maximizing yields per unit of water for a given crop; farmers are more inclined to use water more efficiently, and more water-efficient cash crop selection helps optimize returns. However, this approach requires precise knowledge of crop response to water as drought tolerance varies considerably by species, cultivar and stage of growth. The studies present the latest research concepts and involve various practices for deficit irrigation. Both annual and perennial crops were exposed to different levels of water stress, either during a particular growth phase, throughout the whole growing season or in a combination of growth stages. The overall finding, based on the synthesis of the different contributions, is that deficit or regulated-deficit irrigation can be beneficial where appropriately applied. Substantial savings of water can be achieved with little impact on the quality and quantity of the harvested yield. However, to be successful, an intimate knowledge of crop behavior is required, as crop response to water stress varies considerably.