238 results for group: agriculture-1
Mineral Sources of Potassium for Plant Nutrition
D.A.C. Manning
Abstract
Recently published assessments of nutrient budgets on a national basis have shown that K deficits for developing countries are so substantial that a doubling of world production of potash fertilisers would be required to balance inputs and offtake, simply to meet demands in Africa alone. The price of potassium fertiliser raw materials has increased by a factor of 4 during 2007–2009, approaching $1000 per tonne in some markets. Thus an annual investment of the order of US$5600 million is required to replenish soil K stocks in Africa. In this context it is appropriate to review current knowledge of alternative sources of ...
Increased yield and CO2 sequestration potential with the C4 cereal Sorghum bicolor cultivated in basaltic rock dust-amended agricultural soil
Mike E. Kelland, Peter W. Wade, Amy L. Lewis, Lyla L. Taylor, Binoy Sarkar, M. Grace Andrews, Mark R. Lomas, T. E. Anne Cotton, Simon J. Kemp, Rachael H. James, Christopher R. Pearce, Sue E. Hartley, Mark E. Hodson, Jonathan R. Leake, Steven A. Banwart, David J. Beerling
Abstract
Land-based enhanced rock weathering (ERW) is a biogeochemical carbon dioxide removal (CDR) strategy aiming to accelerate natural geological processes of carbon sequestration through application of crushed silicate rocks, such as basalt, to croplands and forested landscapes. However, the efficacy of the approach when undertaken with basalt, and its potential co-benefits ...
STONEMEAL IN THE SOUTH OF MARANHÃO AND PIAUÍ STATES
According to forecast analysis based on strategic planning tools, the current model of agriculture practiced in the southern plains of Maranhão and Piauí states (Brazil) is unsustainable in the medium and long terms. Elaborated geological surveys in this region are pointing to large deposits of rocks and agrominerals, which can facilitate the practice of stonemeal. This could contribute to the conservation of soils and water resources.
https://www.researchgate.net/publication/295099176_Anais_do_II_Congresso_Brasileiro_de_Rochagem_coletanea_de_varios_autores
EFFECTS OF STONEMEAL WITH ORGANIC FERTILIZATION ON TROPICAL SOILS
This paper presents partial results of research whose main goal is to investigate the potential of using rock dust for soil remineralization. Five types of rocks were evaluated (kamafugite, carbonate-bearing mica schist, hydrothermal metamorphic rock, fresh basalt and weathered basalt) with, or without, the addition of organic compost (bovine manure). Experimentation took place near the city of Planaltina, in the Federal District area of Brasilia, Brazil. Testing occurred over a two-year period on five agricultural crops (corn, beans, garlic, carrots and okra), on a minimum of two harvests, using crop rotation. Preliminary results show that different ...
Performance evaluation of phonolite through mineral form and enrichment of filter cake in sugarcane ratoon
In order to evaluate the performance of phonolite as a source of potassium in fertilization management of sugarcane ratoon through mineral and organo-mineral forms, an experiment was installed in November of 2011 in Casa Branca, SP, Brazil, in soil type red-yellow Latosol Dystrophic medium texture, with variety SP 801816, in third yield, harvested mechanically with no fire. The experiment was designed using random blocks with four replications. The treatments were: T1-Control; T2- Mineral Phonolite 8.5% dose 70 kg ha-1 of K2O; T3- Mineral Phonolite 8.5% dose 100 kg ha-1 of K2O; T4- Mineral Phonolite 8.5% dose 130 kg ha-1 of K2O; T5- Mineral Phonolite ...
ACTION OF MICROORGANISMS IN BASALT POWDER
Stonemeal is the application of crushed rocks in the soil. The objective of this work was to observe the action of microorganisms (inoculated and native) on the mineralization of basalt rock dust and to measure the elements released into the soil. This assessment was done by comparing decomposing particles of basalt powder applied to humic A horizon of a soil derived from granite. The basalt powder was collected at Cavinatto quarry, situated in Limeira-SP (Brazil). The experiment is being conducted in vitro, in isolated plastic containers with the following treatments: 1) soil; 2) sterilized soil; 3) soil without sterilization and with addition of ...
Remineralization of agricultural soils using residues from the amethyst and agate extracting industry, Rio Grande do Sul, Brazil
Brazil is the world’s fourth largest consumer of fertilizers, which is only behind consumers such as China, India and the USA. Therefore, it is crucial to coordinate the production and consumption of this type of product, through appropriate policies, industrial and technological development of mineral exploration and beneficiation of mining activity in the country. With this in mind, it becomes essential to assess the viability of using alternative sources of nutrients, as well as using the waste from mining and extracting industries of precious gems, as remineralizers. Thus, it is possible to reach improvements in soil fertility by transforming ...
Soil Rejuvenation in Mauritius
Mauritius is a tropical island of volcanic origin. The high altitudes attained lead to wide variation in precipitation. To windward, and on the higher altitudes this precipitation may be very high; to leeward, protected by the intervening heights, low precipitation is found. There is, too, only a slight difference in temperature at all altitudes. In the regions of higher precipitation, therefore, the conditions are favorable for a rapid depletion of the soils and the parent basaltic matrix in such areas has broken down, leaving lateritic soils which are very infertile.
Possibilities for Development of the Wood and Forestry Economy in Germany that Include Remineralization
Schwalm-Eder County in North Hesse is especially noteworthy for forestry research because of the potential for developing reforestation on a large scale, especially for the transformation of agricultural land into forests. There is so much overproduction in the agricultural Common Market that about 70% of the agricultural budget of $25 billion is used for the storage of overproduction or for the destruction of it. This has to lead at some point to less intensive agricultural production. The Common market now covers only 40% of its wood requirement; and aside from Japan, the Common Market countries import the most tropical wood, especially from West ...
