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Grazing effects on the greenhouse gas balance of a temperate steppe ecosystem
Springer Science and Business Media LLC - Tập 93 - Trang 357-371 - 2012
Although a significant fraction of the global soil–atmosphere exchange of greenhouse gases (GHGs) occurs in semi-arid zones little is known about the magnitude of fluxes in grazed steppe ecosystems and the interference with grazing intensity. In order to assess GHG burdens and to identify options of climate-optimized livestock farming, GHG emissions of sheep grazing in Inner Mongolia steppe were a...... hiện toàn bộ
Growth chamber study of phosphorus applied as drilled granules or as seed coatings to wheat sown in soils differing in P-sorption capacity
Springer Science and Business Media LLC - Tập 29 - Trang 281-287 - 1991
The effect of seed coatings or drilled granules containing phosphorus (P) on the early growth of wheat was evaluated in a pot trial in two soils differing in P-sorption capacity. P as monocalcium phosphate (MCP) was applied in seed coatings (C) at rates of 0 (inert coating of diatomaceous earth), 5 and 10 kg P ha−1 whereas drilled rates (D) of P were applied at 0, 5, 10, 20 and 40 kg P ha−1 to whe...... hiện toàn bộ
Model comparison of soil processes in eastern Canada using DayCent, DNDC and STICS
Springer Science and Business Media LLC - Tập 109 - Trang 211-232 - 2017
Process-based models are useful tools for estimating the complex interactions between plant, soil and climate systems, assessments which are necessary for improving nutrient cycling and reducing trace gas emissions. Incorporation of knowledge gained through new research is ongoing, thus there is a need for evaluation of model processes and process interactions. In this study, three sites in easter...... hiện toàn bộ
Frequencies of applying two fertilizer mixtures to polybag oil-palm seedlings
Springer Science and Business Media LLC - Tập 10 - Trang 237-242 - 1986
The effects were examined of applying 114g of two fertilizer mixtures containing N, P, K and Mg in weight ratios of 1:1:1:2 and 1:1:1:1 on growth and mineral composition of oil-palm seedlings grown in polythene bags filled with two different soil types. The potting soils were taken from the top layers of the Orlu and Calabar series, which belong to the order of the Ultisols, and which are the main...... hiện toàn bộ
Adoption of nutrient management technologies for rice production: economic and institutional constraints and opportunities
Springer Science and Business Media LLC - Tập 53 - Trang 103-112 - 1998
When semidwarf, fertilizer-responsive varieties became available in the late 1960s, a range of policy and institutional changes were also introduced to exploit the potential of these varieties. As a result, adoption of both high-yielding varieties and chemical fertilizers increased rapidly, especially in irrigated areas. A review of how these policy and institutional changes have influenced adopti...... hiện toàn bộ
Groundwater nitrate in Austria: a case study in Tullnerfeld
Springer Science and Business Media LLC - Tập 64 - Trang 301-315 - 2002
Contamination of groundwater from point and non-point sources is one of the major pollution problems. The agricultural community has become keenly aware of the impact of irrigation and fertilization on groundwater quality. In the plains of Austria groundwater is used as a major source of drinking water. In the last few decades nitrate concentrations in groundwater have increased dramatically. Amon...... hiện toàn bộ
Nitrogen transformations in a flooded soil in the presence and absence of rice plants: 1. Nitrification
Springer Science and Business Media LLC - Tập 51 - Trang 259-267 - 1998
Nitrification rates (n) in the floodwater of an alkaline clay were measured in the absence or presence of rice plants by inhibition of ammonium oxidation and 15N-dilution techniques. Floodwater nitrate concentrations in control treatments showed a marked diurnal variation, and were higher than in the inhibitor treatments after the first day. Ammonium concentrations in floodwater declined exponenti...... hiện toàn bộ
Agriculture and energy with special reference to mineral fertilization
Springer Science and Business Media LLC - Tập 1 - Trang 137-155 - 1980
Direct and residual response of wheat to swine slurry application method
Springer Science and Business Media LLC - Tập 86 - Trang 161-174 - 2009
Swine production represents more than 25% of net agricultural incomes in some Spanish regions. Most of the 25 million t of swine slurry produced yearly in Spain is applied to agricultural fields by surface broadcasting (splash-plate) with important atmospheric N losses that reduce the fertilizer value of the slurry. Surface banding, incorporation, and injection into the soil are recommended method...... hiện toàn bộ
Disentangling the drivers of fertilising material inflows in organic farming
Springer Science and Business Media LLC - - 2013
Organic farming systems are often nutrient-limited. Moreover, even if organic guidelines emphasize the reliance on ecological processes and recycling, the trend towards farm specialisation induces an increased reliance on off-farm fertilising materials in arable areas. There is, therefore, a need to better understand the drivers of nutrient inflows on organic farms. Our objectives were to assess t...... hiện toàn bộ
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