Download or read book Effectiveness of Phosphate Rocks in Colombian Soils as Measured by Crop Response and Soil Phosphorus Levels written by Lawrence Leroy Hammond and published by . This book was released on 1977 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fertilizer Abstracts written by and published by . This book was released on 1977 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Phosphate Rocks for Sustainable Agriculture written by Food and Agriculture Organization of the United Nations. Land and Water Development Division and published by Fao. This book was released on 2004 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive research on the agronomic potential and actual effectiveness of phosphate rocks (PRs) as sources of phosphorus has been carried out in Africa, Asia, Latin America and elsewhere. This publication brings together a wide range of available information on key issues regarding the use of PRs in agriculture, including world deposits; characteristics of sources; evaluation methodologies for direct application of PR (DAPR); analysis of biophysical and farming factors; development and use of decision-support systems for DAPR; soil P testing for PR application; available technologies for enhancing the agronomic effectiveness of indigenous PR sources; environmental issues; legislation guidelines; and future research priorities.

Download or read book New Zealand Journal of Agricultural Research written by and published by . This book was released on 1984 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phosphate Rock in Colombia written by James Bachelder Cathcart and published by . This book was released on 1969 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Strategies to Use Indigenous and Imported Sources of Phosphorus to Improve Soil Fertility and Land Productivity in Mali written by Julio Henao and published by . This book was released on 1999 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Abstracts on Cassava manihot Esculenta Crantz written by and published by . This book was released on 1982 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nutrient Management for Sustainable Crop Production in Asia written by A. E. Johnston and published by Oxford University Press, USA. This book was released on 1998 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past 30 years, crop yields, particularly of rice, have been greatly increased in many Asian countries by advances in plant breeding and by the application of nitrogenous and phosphatic fertilizers. This has become known as the "Green Revolution", which has been a major factor underpinning the rapid growth of Asian economies, providing a cheap, indigenous food supply. However, while human populations continue to increase, in many cases yields are no longer being sustained, due to a reduction in soil quality. Thus, food security in Asia has again become a source of concern. This book is the result of an international conference held in Bali in December 1996, initiated by The World Phosphate Institute (IMPHOS) to discuss the action which must be taken to reverse soil degradation and improve nutrient levels. It includes papers and working group reports on nutrient management and balance, the potential of different phosphate sources, rock phosphate efficiency in acid upland soils, current usage and future requirements for fertilizers, sustainability and the environment, and policy and pricing. Finally, there is a summary and conference resolution. Contributors to the book come from Europe, USA, Australia and many Asian countries. It is essential reading for soil scientists and agronomists concerned with agriculture in Asia and will also be of interest to environmentalists, ecologists and economists concerned with sustainable natural resource management.

Download or read book Agronomy Abstracts written by and published by . This book was released on 1993 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).

Download or read book Influence of Rock Phosphate on Available Phosphorus as Measured by Plant Uptake and Soil Extractants written by José Espinosa and published by INIAP Archivo Historico. This book was released on 1979 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report Centro Internacional de Agricultura Tropical written by Centro Internacional de Agricultura Tropical and published by . This book was released on 1978 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Zealand Journal of Agricultural Research written by and published by . This book was released on 1984 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1977 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomy News written by and published by . This book was released on 1978 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.

Download or read book Reaction of Rock Phosphorus in Some Brazilian Soils and Their Utilization by Plants written by P. Rosand Cabala and published by . This book was released on 1979 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: In three soil from southern Bahia(Brazil) a local (Patos) rock phosphorus wa compared with monocalcium phosphate and Gafsa and Morocco rock phosphates as a source of P by sorghum and by phosphate soil parameters. The utilization of Patos rock phosphate by two legumes and two grasses with VA mycorrhizal infection and NH4 or NO3 nitrogen nutrition was evaluated and, using soil blocks, pH gradients at different distances from the root plane were determined. Low fertilizer value was recorded for Patos rock phosphate, the effectiness of whic increased with storage time only in a clay soil having high organic matter content, CEC, and high adsorption capacity. In all soils Gafsa and Morocco showed equal or higher effectiveness than monocalcium phosphate. The low availability of Patos in related to its mineralogical composition, to low solubility in 2% citric acid and low amounts of phosphate extracted by anion exchange resin. The highest rate of P immobilization was recorded in a soil having a high content of Al and Fe extracted by dithionite and pyrophosphate, and also goethite and gibbsite as revealed by X-ray examination. The behaviour was note realed by x-ray examination. This behaviour was note related to the amounts of Al and Fe extracted by oxalate, exchangeable e Al or to the adsorption-dsorption properties using o,01M CaCl2 solutions. Phosphate extracted by anion exchange resin showed the best correlation with P uptake by sorghum, E value P soluble in water being second and third best. Poor correlations ...

Download or read book Comprehensive Dissertation Index Agriculture written by and published by . This book was released on 1984 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Potential Use of Rock Phosphate in Sudan for Sustainable Agricultural Production written by Inaam Saad and published by Page Publishing Inc. This book was released on 2022-01-25 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture is primarily the uppermost important sector in Sudan, contributing significantly to the country’s national economy. However, in spite of the country’s vast cultivated area, productivity remains very low. The declining agricultural production is indicative of the need for adopting sustainable agricultural development approaches to the achieve country’s food security. The attainment of sustainable agricultural production will require the proper use of all available resources such as land, water, and mineral resources, including the phosphate rock reserves. Rock phosphate deposits of potential economic value occur at more than a hundred locations in sub-Saharan African countries, including Sudan. Several geological surveys in Sudan have proven the occurrence of abundant resources of phosphate deposits in different locations in the country. For advocating the initiation of rock phosphate mining and phosphate fertilizer industry in Sudan, this book delivers sufficient and validated information on the underutilized resource of rock phosphate in Sudan and exposes its potential role in the development of sustainable agricultural production. The book presents an accurate image of the current status and prospective scenario in relation to rock phosphate deposits and the potential establishment of the fertilizer industry in Sudan. The book presents a comprehensive literature review on the history, advantages, and impacts of using rock phosphate. It also sheds light on the rock phosphate deposits in Sudan, their locations, and geological and agricultural quality as compared to rock phosphate from other global resources. The book presents two detailed case studies on assessing the agronomic value of Kurun and Uro rock phosphate rocks as fertilizers and their environmental impact assessment. The book then highlights the potential benefits of phosphate mining and the initiation of the phosphate fertilizer industry in Sudan, proposes a plan for achieving that goal, and presents recommendations to bring the Sudanese phosphate fertilizer industry to life.