soil mineral N
Modeling the effects of litter stoichiometry and soil mineral N availability on soil organic matter formation using CENTURY-CUE (v1.0)
... a N scaling function to represent the limits of mineral N availability on litter decay rate, we developed a simple but effective litter decomposi- tion model that accounts for key stoichiometric ...
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The performance of the EU Rotate N model in predicting the growth and nitrogen uptake of rotations of field vegetable crops in a Mediterranean environment
... of N fertilizer (average recommended N1, assumed farmer’s practice N2 = N1 + 0·3 × N1 and a zero control ...crop N concentration and crop N uptake were promising. However, soil mineral ...
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Repeated use of green manure catch crops in organic cereal production grain yields and nitrogen supply
... The N concentration in the dry matter (DM) of the fractionated plant material was ...measured. Soil mineral N (0-25 cm) was measured in late April and late October (extraction by 1M ...
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Root-zone mineral nitrogen changes as affected by crop sequence and tillage
... Soil mineral-N levels (0-0.45-m depth) in 1990 and 1991 for no-till corn followed by no-till wheat (CNT-WNT) and conventional- tilled corn followed by conventional-tilled wheat (CT-WT)..[r] ...
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Integrating maize and triticale in grass/clover based dairy systems: examining yields and autumn soil nitrate levels
... establish N-efficient crop rotations with perennial ryegrass/white clover, maize and triticale, a 9-year field experiment was executed on an organic experimental farm in the ...yield, N yield, soil ...
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The Fluxes of Organic C and N, and Microbial Biomass and Maize Yield in an Organically Manured Ultisol of the Guinea Savanna Agroecological Zone of Nigeria
... determining soil mineral N dynamics following organic amendment has been ...to soil, a decrease of soil mineral N as observed in the short term in the manured com- pared ...
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Modelling biomass, soil water content and mineral nitrogen in dairy pastures: a comparison of DairyMod and APSIM
... kg N/ha immediately after every harvest in spring and autumn and every other harvest in summer and ...and soil moisture status. Soil mineral N was measured on a single core in each of ...
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Soil inorganic N and N uptake by Maize following application of legume biomass, tithonia,manure and mineral fertilizer in Central Kenya
... on soil mineral N dynamics and N uptake by ...of soil inor- ganic N and uptake of N by maize varied among the different sampling dates, treatments and between sea- ...of ...
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A sensitivity analysis of the prediction of the nitrogen fertilizer requirement of cauliflower crops using the HRI WELL N computer model
... Both soil mineral N before planting and yield expectation had significant effects on soil mineral N at harvest in the 0–90 cm layer for all weather\soil type scenarios ...
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Evaluation of a generic agro hydrological model for water and nitrogen dynamics (SMCR N) in the soil–wheat system
... (a), N uptake (b), soil water content (c) and soil mineral N (d) under the N2 treatment in the PAGV_84 ...cm soil layers, and the measured values are represented by symbols of □, ...
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Cumulative and partially recoverable impacts of nitrogen addition on a temperate steppe
... with N addition), 2009, and 2010 (the first two years after N addition ceased), respectively, then increased to about 74% (75%) in 2011 (the third year; Appendix S1: ...high N addition (95, 170, 270 ...
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Nematode infestation and N effect of legumes on soil and crop yelds in legume sorghum rotations
... yields, soil mineral N and nematode in- festation were studied during five cropping sea- sons (2000 to 2004) in a weakly acid Ultisol of the agronomy research station of Farakô-Balo- cated in the ...
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Optimal length of the grass clover period in crop rotations: results of a 9 year field experiment under organic conditions
... of soil mineral N over time for all crops, if compared to G2M1 (interaction ...in mineral N when an extra year of maize was included in the rotation and a slight increase in ...
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Effects of perennial (‘Russell’) lupins on soil nitrogen and carbon in acid high-country soils
... improve soil N and biological N cycling (Scott ...the soil fertility is marginal and the application of fertilisers and lime to improve this situation is uneconomic (Nordmeyer & Davis ...
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... between layers of single profi les, including P4 that was sampled away from the root zone. This variation was lower (CV ~60 %) in P1 and P2 compared P3 and P4 (~80 % and ~100 %, respectively). In the (60 to 80) cm layer ...
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A slow release nitrogen fertiliser produced by simultaneous granulation and superheated steam drying of urea with brown coal
... The N content of the dried products at all C:N ratios was close to the theo- retical N content determined from the initial amount of urea addition to the wet ...high N formula- tion, which may have ...
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Management versus site effects on the abundance of nitrifiers and denitrifiers in European mountain grasslands
... with soil total N content, but also responded to other soil ...of soil water availability and lack of oxygen for denitrification (Firestone 1982; Tiedje 1988; Szukics et ...2010). Soil ...
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Mathematical planning in experiments on 'soil-fertilizer-yield' interactions
... The soil structural composition after harvesting changed (as compared to the initial ...the soil investi- gated to preserve its initial structural ...
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Oligotyping reveals stronger relationship of organic soil bacterial community structure with N- amendments and soil chemistry in comparison to that of mineral soil at Harvard Forest, MA, USA
... major N stor- age metabolites in plants, especially under excess N ...the N-treated plots at the HF (Minocha et ...of N-addition on shifts in bacterial com- munity structure may have resulted ...
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Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment
... the N effect on d 13 C that we observed was more pronounced in dry ...15 N values increased when the wheat harvest was delayed, especially for a very late harvest in September, 1977, which induced much ...
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