Two Approaches to Quantification of Nutrients from Agricultural Land
Author: Stephen W. Kraszewski
Publisher:
Published: 2009
Total Pages: 90
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Stephen W. Kraszewski
Publisher:
Published: 2009
Total Pages: 90
ISBN-13:
DOWNLOAD EBOOKAuthor: Rabindra N. Roy
Publisher: Food & Agriculture Org.
Published: 2003
Total Pages: 104
ISBN-13: 9789251050385
DOWNLOAD EBOOKNutrient-balance assessments are valuable tools for delineating the consequences of farming on soil fertility. Various approaches and methods for different situations have been used in the past. This bulletin presents a state-of-the-art review of nutrient balance studies. It brings out the evolution of the approaches and methods, provides for comparisons among them, features the improvements made, and highlights remaining issues. This analysis will be useful in further development of the assessment methodologies as reliable tools for devising time-scale soil fertility management interventions.
Author: Stephanie Ann Nummer
Publisher:
Published: 2016
Total Pages: 79
ISBN-13:
DOWNLOAD EBOOKNitrogen and phosphorus runoff from agricultural lands and the subsequent impact on water quality has been of great concern in the United States, due to harmful algal blooms and anoxic zones in areas such as Lake Erie and the Gulf of Mexico. Conservation practices have been widely used to reduce the quantity of nutrients leaving a field, but there is a lack of research on the effectiveness of these practices using field scale data. The objective of this thesis is to quantify the effect of conservation practices on nitrogen and phosphorus runoff in farmlands. A meta-analysis was conducted using the Measured Annual Nutrient loads from AGricultural Environments (MANAGE) database created by the USDA-ARS. MANAGE is a compilation of 65 publications including data on nitrogen and phosphorus loads, runoff, land use, fertilizer application, and other field characteristics. The observational nature of the dataset makes direct comparisons from field to field impossible because of large variations in field characteristics. Thus, additional steps must be taken to estimate the effect of conservation practices on nutrient loss. To quantify this effect, I used propensity score matching and multilevel modeling, two statistical methods common for observational data. Propensity score matching shows that conservation practices have a significant reduction of 67.5% in total phosphorus, 83% in particulate phosphorus, and 67.3% in particulate nitrogen. Multilevel modeling results - calculated using two different computational methods - support these findings by showing a significant reduction of 57.7% in total phosphorus, 76.2% and 82.1% in particulate phosphorus (via the two methods), and 63.7% in particulate nitrogen. When examining different land uses and fertilizer application methods, the multilevel modeling showed that conservation practices had the most impact on row crops (e.g. corn and soybeans) and on farms fertilized via the injected or surfaced applied method. The results from this work represent the average effect of conservation practices on a national scale. At a regional scale, the effects of conservation practices may vary because of regional differences in agricultural practices and climate. To assist future research at regional and local scales, this thesis provides a Bayesian modeling framework for future quantification of these effects.
Author: Jules N. Pretty
Publisher: Routledge
Published: 2012-06-25
Total Pages: 292
ISBN-13: 1136529276
DOWNLOAD EBOOKContinued population growth, rapidly changing consumption patterns and the impacts of climate change and environmental degradation are driving limited resources of food, energy, water and materials towards critical thresholds worldwide. These pressures are likely to be substantial across Africa, where countries will have to find innovative ways to boost crop and livestock production to avoid becoming more reliant on imports and food aid. Sustainable agricultural intensification - producing more output from the same area of land while reducing the negative environmental impacts - represents a solution for millions of African farmers. This volume presents the lessons learned from 40 sustainable agricultural intensification programmes in 20 countries across Africa, commissioned as part of the UK Government's Foresight project. Through detailed case studies, the authors of each chapter examine how to develop productive and sustainable agricultural systems and how to scale up these systems to reach many more millions of people in the future. Themes covered include crop improvements, agroforestry and soil conservation, conservation agriculture, integrated pest management, horticulture, livestock and fodder crops, aquaculture, and novel policies and partnerships.
Author: Drechsel, Pay, Giordano, Mark, Gyiele, Lucy
Publisher:
Published: 2004
Total Pages: 33
ISBN-13: 9789290905707
DOWNLOAD EBOOKDespite the importance of nutrient-water interactions, they are often ignored in analysis. After discussing the interrelationships between soil nutrients and water and reviewing methods for determining nutrient balances, this report describes an array of available methods for soil nutrient valuation and provides a discussion of four nutrient valuation studies, which together cover a range of scales, perspectives, and geographic contexts. It also includes case studies from Ghana, Mexico, sub-Saharan Africa, and an examination of possible approaches to valuing soil organic matter and its various functions--an often ignored area in literature.
Author: J. Dumanski
Publisher: World Bank Publications
Published: 1998-01-01
Total Pages: 144
ISBN-13: 9780821342084
DOWNLOAD EBOOKThis bibliography is a review of available information on indicators of sustainable land management and land quality. The report compiles, organizes, and summarizes available data and information on indicators and makes them accessible through the World Wide Web, email, and as printed reports. It is useful for research on indicators of sustainability, as well as for decisionmakers faced with implementing a sustainable land management component in rural development projects.
Author: W. Graeme Donovan
Publisher: World Bank Publications
Published: 1998-01-01
Total Pages: 76
ISBN-13: 9780821342367
DOWNLOAD EBOOKWorld Bank Technical Paper No. 408. This report is a critical review of the technical, economic, and institutional constraints on improving soil fertility in Sub-Saharan Africa, and the actions recommended to address them. Action plans prepared for Ghana, Kenya, Malawi, and Mali examine the demand for and supply of mineral fertilizers, the exploitation of local mineral resources, the prevention of soil erosion and increasing soil-water retention, and soil fertility management using organic technologies and management practices.
Author: Zdenko Rengel
Publisher: CRC Press
Published: 2017-12-14
Total Pages: 268
ISBN-13: 1351427466
DOWNLOAD EBOOKIf you?re an agronomist, horticulturalist, plant and soil scientist, breeder, or soil microbiologist, you?ll want to read Nutrient Use in Crop Production to find everything you need to know about judicious nutrient management and maximizing nutrient utilization in the agricultural landscape. In this book, you?ll discover ways to minimize undesirable nutrient losses and techniques for preserving the environment while meeting the challenges of providing the earth?s increasing population with sufficient food, feed, and fiber to sustain life. Your existing knowledge base concerning this vital area of science will expand and grow as you become more open to the new ideas and applications contained in Nutrient Use in Crop Production. Most importantly, you?ll avoid the narrow scope found in most crop nutrition books and take a broader, more globally minded view of how to maximize nutrient use and minimize nutrient losses in the soil of agricultural systems. Specifically, you?ll find these and other areas covered: population growth, food production, and nutrient requirements managing soil fertility decline the role of nitrogen fixation in crop production delivering fertilizers through seed coatings micronutrient fertilizers the role of nutrient-efficient crops in modern agriculture Feeding the world without depleting the world?s viable soil nutrients is a monumental task--but one that can be achieved, as evidenced in the pages of Nutrient Use in Crop Production. You and your circle of students, professionals, and administrators will benefit greatly from this in-depth view of nutrient use in both developed and non-industrialized counties to give you a better sense of how to allow both the world and the world?s crops to grow.
Author: Y. V. Singh
Publisher: CRC Press
Published: 2024-11-15
Total Pages: 325
ISBN-13: 104015669X
DOWNLOAD EBOOKWritten out of the author’s experience at the laboratories in the Institute of Agricultural Sciences at Banaras Hindu University, this book addresses the need for identifying and addressing deficiencies in soil, water, and plants. Techniques to evaluate soil fertility constraints based on soil chemical extraction and analysis of the plants that grow on such soils are discussed. This book also presents standard methods from different sources – these have been compiled and adapted for routine analyses in the Indian subcontinent. This book is aimed at aimed at research scientists, technicians, and students. Print edition not for sale in South Asia (India, Sri Lanka, Nepal, Bangladesh, Pakistan or Bhutan)
Author: Shivam Gupta
Publisher: CRC Press
Published: 2024-06-03
Total Pages: 406
ISBN-13: 1040021395
DOWNLOAD EBOOKThis book includes concepts, methodologies, and techniques used in soil nutrients and irrigation water management with regional and global prospects. This book accommodates up-to-date approaches to agricultural technologies along with future directions and compiles a wide range of articles ranging from soil moisture flow, nutrient dynamics, crop water estimation techniques, approaches to improve crop water productivity and soil health, crop simulation modeling, and remote sensing/GIS applications. The book also includes chapters on climate-resilient agriculture, advances in big data and machine-learning techniques, IoT, plasma technology, seed priming, and precision farming techniques and their environmental/economic impacts. Features: • Discusses applications sustainable technologies for soil nutrients and irrigation water management at multi-scale. • Covers application of remote sensing/GIS, big data and machine learning, IoT, plasma technology, seed priming, and precision farming techniques for nutrients and water management. • Reviews concepts, methodologies, and techniques being used in soil nutrients and irrigation water management. • Provides up-to-date information as well as future directions in the field of nutrients and agricultural water management. This book is aimed at researchers and graduate students in agriculture, water resources, environment, and irrigation engineering.