6 results for group: agriculture-2


Increased yield and CO2 sequestration potential with the C4 cereal Sorghum bicolor cultivated in basaltic rock dust-amended agricultural soil

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 for agriculture, require experimental and field evaluation. Here we report that amending a UK clay-loam agricultural soil with a high loading (10 kg/m2) of relatively coarse-grained crushed basalt significantly increased the yield (21 ± 9.4%, SE) of the important C4 cereal Sorghum ...

How will minerals feed the world in 2050?

By 2050, the world’s population will have reached 9 billion. To feed that many people, soil fertility will have to be maintained artificially. All fertiliser materials depend on a geological resource: nitrogen (N) fertilizer production needs fossil fuels, and both phosphate (P) and potassium (K) are derived by mining. Irrespective of new biological techniques in plant breeding and genetic modification, soils still need to supply the mineral nutrients that plants require, and these are exported from soil with every harvest. Studies of global offtake of N, P and K from soils through crop production show that although N and P are roughly in ...

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

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 ...

Prehistoric agricultural depletion of soil nutrients in Hawai‘i

We investigated the fate of soil nutrients after centuries of indigenous dryland agriculture in Hawai‘i using a coupled geochemical and archaeological approach. Beginning 500 years ago, farmers began growing dryland taro and sweet potato on the leeward slopes of East Maui. Their digging sticks pierced a subsurface layer of cinders, enhancing crop access to the soil water stored below the intact cinders. Cultivation also catalyzed nutrient losses, directly by facilitating leaching of mobile nutrients after disturbing a stratigraphic barrier to vertical water movement, and indirectly by increasing mineral weathering and subsequent uptake and harvest. ...

Use of Emerald Mining Tailings From the Esmeraldifera Province Between Itabira and Nova Era – MG, As a Supplier of Nutrients to Agricultural Soils

Abstract Two experiments were conducted in a laboratory with incubation of mineral tailings formed predominantly by emerald-biotite-amphibole-mica quartz schist on soil with and without plants. The first experiment evaluated the release of exchangeable Mg+2, Ca+2 and K+, change in pH, soil aluminum saturation and soil base saturation. The methodology used was to incubate 0, 1, 2, 4, 8, 12, 16, 20, 40 t/ha of tailings for 60 days. The second experiment evaluated the dry matter production of hybrid corn for doses, used in the form of rock dust, of 0, 5, 10, 20, 40 t/ha. A completely randomized design was used with four replications in the first and ...