Soil Phosphorus Fractions in Victorian Grain Production Systems PDF Download
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Author: Dang Thanh Vu
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 310
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Book Description
A survey was undertaken of changes in P status of the topsoil in farmers' paddocks compared to baseline conditions using a 'fence-line' methodology across a wide range of soil types in northem Victoria. Changes in the amount and distribution of P amongst different soil fractions were assessed in 43 different sites and related to farmer practises/crop rotations, soil type, climate and a range of other soil chemical and physical properties. The highly positive P balance in 27 farmers' paddocks indicates a potentially high rate of P fertilization in those paddocks. The excessive P has been transformed into both labile and non-labile pools depending on the general chemical-physical properties of a particular soil. In particular, in soil with a sandy texture and low oxalate-extractable Al and Fe such as the sandy Calcarosols, the fertiliser P was preferentially transformed into labile and moderately labile pools. The information received will be helpful for P recommendations that would help optimise the use of P fertilisers for farmers in these regions.
Author: Dang Thanh Vu
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 310
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Book Description
A survey was undertaken of changes in P status of the topsoil in farmers' paddocks compared to baseline conditions using a 'fence-line' methodology across a wide range of soil types in northem Victoria. Changes in the amount and distribution of P amongst different soil fractions were assessed in 43 different sites and related to farmer practises/crop rotations, soil type, climate and a range of other soil chemical and physical properties. The highly positive P balance in 27 farmers' paddocks indicates a potentially high rate of P fertilization in those paddocks. The excessive P has been transformed into both labile and non-labile pools depending on the general chemical-physical properties of a particular soil. In particular, in soil with a sandy texture and low oxalate-extractable Al and Fe such as the sandy Calcarosols, the fertiliser P was preferentially transformed into labile and moderately labile pools. The information received will be helpful for P recommendations that would help optimise the use of P fertilisers for farmers in these regions.
Author: Rattan Lal
Publisher: CRC Press
ISBN: 1482257858
Category : Nature
Languages : en
Pages : 351
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Book Description
Phosphorus is an essential plant nutrient, but global population growth has dramatically reduced the availability of phosphorus fertilizer resources. Despite this scarcity, there remain numerous problems associated with the excessive and inappropriate use of phosphorus leading to non-point source pollution and eutrophication of natural waters. Identifying appropriate systems for managing soil phosphorus and reducing the risks of eutrophication are needed to minimize the environmental risks. This book focuses on the availability and recycling of phosphorus; regulatory and policy issues of sustainable phosphorus use; and water quality management in agroecosystems pertaining to phosphorus. Sections are dedicated to global phosphorus reserves; cycling and pathways of phosphorus; phosphorus in agriculture; human dimensions and policy intervention; and research and development priorities. Phosphorus is a finite but crucial resource and is an essential element to all life. Sub-optimal availability and nutrient imbalance in the root zone can adversely impact plant growth, and the quality of food and feed grown on these soils. However, the proven reserves of phosphorus can hardly be adequate for a few centuries only. Yet, its misuse and mismanagement has caused severe problems of eutrophication of water and pollution of the environment. Thus, judicious management of soil phosphorus is essential. This volume is specifically devoted to availability and recycling of phosphorus, regulatory/policy issues of sustainable use of phosphorus, and management in agroecosystems in the context of maximizing the use efficiency and minimizing the environmental risks of water quality.
Author: Yash Dang
Publisher: Cambridge Scholars Publishing
ISBN: 152758707X
Category : Business & Economics
Languages : en
Pages : 611
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Book Description
Globally, over two thirds of soils are affected by physical, chemical, or biological soil constraints. These constraints cause significant yield loss, and, as such, identifying appropriate management strategies is crucial to ensure future world food production. In order to help agricultural researchers and practitioners better understand soil constraint management, this book comprehensively outlines the occurrence of the major soil constraints and the most appropriate strategies to manage these for sustainable food production. Importantly, it brings together experts from major agricultural regions globally to highlight approaches with the most success in different environmental and socioeconomic regions worldwide.
Author:
Publisher: DIANE Publishing
ISBN: 1428907629
Category :
Languages : en
Pages : 42
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Book Description
Author: Neal K. Van Alfen
Publisher: Elsevier
ISBN: 0080931391
Category : Technology & Engineering
Languages : en
Pages : 2745
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Book Description
Encyclopedia of Agriculture and Food Systems, Second Edition, Five Volume Set addresses important issues by examining topics of global agriculture and food systems that are key to understanding the challenges we face. Questions it addresses include: Will we be able to produce enough food to meet the increasing dietary needs and wants of the additional two billion people expected to inhabit our planet by 2050? Will we be able to meet the need for so much more food while simultaneously reducing adverse environmental effects of today’s agriculture practices? Will we be able to produce the additional food using less land and water than we use now? These are among the most important challenges that face our planet in the coming decades. The broad themes of food systems and people, agriculture and the environment, the science of agriculture, agricultural products, and agricultural production systems are covered in more than 200 separate chapters of this work. The book provides information that serves as the foundation for discussion of the food and environment challenges of the world. An international group of highly respected authors addresses these issues from a global perspective and provides the background, references, and linkages for further exploration of each of topics of this comprehensive work. Addresses important challenges of sustainability and efficiency from a global perspective. Takes a detailed look at the important issues affecting the agricultural and food industries today. Full colour throughout.
Author: Luke Gatiboni
Publisher: Frontiers Media SA
ISBN: 2889663574
Category : Science
Languages : en
Pages : 140
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Book Description
Author: Victoria. Department of Agriculture
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 798
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Book Description
Author: Victoria. Department of Agriculture
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 868
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Book Description
Author: Victoria. Dept. of Agriculture
Publisher:
ISBN:
Category :
Languages : en
Pages : 804
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Book Description
Author: Victoria. Department of Agriculture
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 834
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Book Description
