The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Rita Cássia Félix Alvarez - One of the best experts on this subject based on the ideXlab platform.
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soil fertility plant nutrition and grain yield of upland rice affected by surface application of lime silicate and phosphogypsum in a tropical no till system
Catena, 2016Co-Authors: Carlos Alexandre Costa Crusciol, Angela C C A Artigiani, Orivaldo Arf, Adriano Stephan Nascente, Antonio Carmeis C A Filho, Rogerio Peres Soratto, Rita Cássia Félix AlvarezAbstract:Abstract The development of technologies that provide rapid acidity amelioration of the soil profile through the surface application of amendments and phosphogypsum, such as no-till (NT) systems, is extremely important to provide adequate chemical conditions in tropical soils with low natural fertility, which limits the grain yield of upland rice (Oryza sativa L.). Thus, this study aimed to evaluate the effects of surface applications of lime, silicate, and phosphogypsum, applied individually or in mixtures, on the chemical properties of the soil profile in an NT system and to determine their effects on the nutrition, yield components, and grain yield of upland rice. The experiment was designed as a completely randomized block with eight treatments replicated four times. The combination of phosphogypsum with lime and/or silicate improved the surface and subsurface soil chemical properties 12 months following application. The mixtures increased the Concentrations of K, Ca, Mg, N–NO3−, and S–SO42 − in the subsurface layers. The Sulphur Concentration in the flag leaves of upland rice was higher with phosphogypsum application. The number of panicles per m2 and grain yield of upland rice were positively influenced by the surface application of soil acidity amendments and phosphogypsum mixtures.
S A Jones - One of the best experts on this subject based on the ideXlab platform.
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delaying senescence of wheat with fungicides has interacting effects with cultivar on grain Sulphur Concentration but not with Sulphur yield or nitrogen Sulphur ratios
European Journal of Agronomy, 2005Co-Authors: S Pepler, Michael Gooding, K E Ford, R H Ellis, S A JonesAbstract:Abstract Winter wheat was grown in three field experiments, each repeated over two or three seasons, to investigate effects of extending flag leaf life by fungicide application on the Concentration, kg ha −1 and mg grain −1 of nitrogen (N) and Sulphur (S) as well as N:S ratio and sodium dodecyl sulphate (SDS) sedimentation volume. The experiments involved up to six cultivars and different application rates, timings and frequencies of azoxystrobin and epoxiconazole. For every day the duration to 37% green flag leaf area ( m ) was extended, N yield was increased by 2.58 kg ha −1 , N per grain by 0.00957 mg, S yield by 0.186 kg ha −1 and S per grain by 0.000718 mg. The N:S ratio decreased by 0.0135 per day. There was no evidence that these responses varied with cultivar. In contrast, the relationship between flag leaf life and N or S Concentration interacted with cultivar. The N and S Concentrations of Shamrock, the cultivar that suffered most from brown rust ( Puccinia recondita ), increased with the extension of flag leaf life whereas the Concentrations of N and S in Malacca, a cultivar more susceptible to Septoria tritici , decreased as flag leaf senescence was delayed. This was because the relationships between m and N and S yields were much better conserved over cultivars than those between m and thousand grain weight (TGW) and grain yield ha −1 .
Michael Gooding - One of the best experts on this subject based on the ideXlab platform.
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Intercropping with pulses to concentrate nitrogen and Sulphur in wheat
The Journal of Agricultural Science, 2007Co-Authors: Michael Gooding, R. E. Ruske, E. Kasyanova, Henrik Hauggaard-nielsen, Erik Steen Jensen, C. Dahlmann, P. Von Fragstein, A. Dibet, Guénaëlle Corre-hellou, Yves CrozatAbstract:SUMMARY The effects of intercropping wheat with faba bean (Denmark, Germany, Italy and UK) and wheat with pea (France), in additive and replacement designs on grain nitrogen and Sulphur Concentrations were studied in field experiments in the 2002/03, 2003/04 and 2004/05 growing seasons. Inter- cropping wheat with grain legumes regularly increased the nitrogen Concentration of the cereal grain, irrespective of design or location. Sulphur Concentration of the cereal was also increased by inter- cropping, but less regularly and to a lesser extent compared with effects on nitrogen Concentration. Nitrogen Concentration (g/kg) in wheat additively intercropped with faba bean was increased by 8 % across all sites (weighted for inverse of variance), but Sulphur Concentration was only increased by 4 %, so N :S ratio was also increased by 4 %. Intercropping wheat with grain legumes increased sodium dodecyl sulphate (SDS)-sedimentation volume. The effect of intercropping on wheat nitrogen Concentration was greatest when intercropping had the most deleterious effect on wheat yield and the least deleterious effect on pulse yield. Over all sites and seasons, and irrespective of whether the design was additive or replacement, increases in crude protein Concentration in the wheat of 10 g/kg by intercropping with faba bean were associated with 25-30 % yield reduction of the wheat, compared with sole-cropped wheat. It was concluded that the increase in protein Concentration of wheat grain in intercrops could be of economic benefit when selling wheat for breadmaking, but only if the bean crop was also marketed effectively.
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delaying senescence of wheat with fungicides has interacting effects with cultivar on grain Sulphur Concentration but not with Sulphur yield or nitrogen Sulphur ratios
European Journal of Agronomy, 2005Co-Authors: S Pepler, Michael Gooding, K E Ford, R H Ellis, S A JonesAbstract:Abstract Winter wheat was grown in three field experiments, each repeated over two or three seasons, to investigate effects of extending flag leaf life by fungicide application on the Concentration, kg ha −1 and mg grain −1 of nitrogen (N) and Sulphur (S) as well as N:S ratio and sodium dodecyl sulphate (SDS) sedimentation volume. The experiments involved up to six cultivars and different application rates, timings and frequencies of azoxystrobin and epoxiconazole. For every day the duration to 37% green flag leaf area ( m ) was extended, N yield was increased by 2.58 kg ha −1 , N per grain by 0.00957 mg, S yield by 0.186 kg ha −1 and S per grain by 0.000718 mg. The N:S ratio decreased by 0.0135 per day. There was no evidence that these responses varied with cultivar. In contrast, the relationship between flag leaf life and N or S Concentration interacted with cultivar. The N and S Concentrations of Shamrock, the cultivar that suffered most from brown rust ( Puccinia recondita ), increased with the extension of flag leaf life whereas the Concentrations of N and S in Malacca, a cultivar more susceptible to Septoria tritici , decreased as flag leaf senescence was delayed. This was because the relationships between m and N and S yields were much better conserved over cultivars than those between m and thousand grain weight (TGW) and grain yield ha −1 .
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Effects of triazole and strobilurin fungicide programmes, with and without late-season nitrogen fertiliser, on the baking quality of Malacca winter wheat
Journal of Cereal Science, 2004Co-Authors: R. E. Ruske, Michael Gooding, B.j. DobraszczykAbstract:Field experiments were conducted over 3 years to study the effect of applying triazole and strobilurin fungicides on the bread-making quality of Malacca winter wheat. Averaged over all years the application of a fungicide programme increased yields, particularly when strobilurin fungicides were applied. Reductions in protein Concentration, Sulphur Concentration, Hageberg falling number and loaf volumes also occurred as the amount of fungicide applied increased. However, there were no deleterious effects of fungicide application on sodium dodecyl sulphate (SDS) sedimentation volumes, N:S ratios or dough rheology. Effects of fungicide application on bread-making quality were not product specific. Therefore, it appears that new mechanisms to explain strobilurin effects on bread-making quality do not need to be invoked. Where reductions in protein Concentration did occur they could be compensated for by a late-season application of nitrogen either as granular ammonium nitrate at flag leaf emergence or foliar urea at anthesis. These applications, however, sometimes increased the N:S ratio of the extracted flour and failed to improve loaf volume. Multiple regression analysis revealed that main effects of year, flour protein Concentration and N:S ratio could explain 93% of the variance in loaf volume caused by season, fungicide and nitrogen treatments. However, an equally good fit was achieved by just including Sulphur Concentration with year.
Carlos Alexandre Costa Crusciol - One of the best experts on this subject based on the ideXlab platform.
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soil fertility plant nutrition and grain yield of upland rice affected by surface application of lime silicate and phosphogypsum in a tropical no till system
Catena, 2016Co-Authors: Carlos Alexandre Costa Crusciol, Angela C C A Artigiani, Orivaldo Arf, Adriano Stephan Nascente, Antonio Carmeis C A Filho, Rogerio Peres Soratto, Rita Cássia Félix AlvarezAbstract:Abstract The development of technologies that provide rapid acidity amelioration of the soil profile through the surface application of amendments and phosphogypsum, such as no-till (NT) systems, is extremely important to provide adequate chemical conditions in tropical soils with low natural fertility, which limits the grain yield of upland rice (Oryza sativa L.). Thus, this study aimed to evaluate the effects of surface applications of lime, silicate, and phosphogypsum, applied individually or in mixtures, on the chemical properties of the soil profile in an NT system and to determine their effects on the nutrition, yield components, and grain yield of upland rice. The experiment was designed as a completely randomized block with eight treatments replicated four times. The combination of phosphogypsum with lime and/or silicate improved the surface and subsurface soil chemical properties 12 months following application. The mixtures increased the Concentrations of K, Ca, Mg, N–NO3−, and S–SO42 − in the subsurface layers. The Sulphur Concentration in the flag leaves of upland rice was higher with phosphogypsum application. The number of panicles per m2 and grain yield of upland rice were positively influenced by the surface application of soil acidity amendments and phosphogypsum mixtures.
S Pepler - One of the best experts on this subject based on the ideXlab platform.
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delaying senescence of wheat with fungicides has interacting effects with cultivar on grain Sulphur Concentration but not with Sulphur yield or nitrogen Sulphur ratios
European Journal of Agronomy, 2005Co-Authors: S Pepler, Michael Gooding, K E Ford, R H Ellis, S A JonesAbstract:Abstract Winter wheat was grown in three field experiments, each repeated over two or three seasons, to investigate effects of extending flag leaf life by fungicide application on the Concentration, kg ha −1 and mg grain −1 of nitrogen (N) and Sulphur (S) as well as N:S ratio and sodium dodecyl sulphate (SDS) sedimentation volume. The experiments involved up to six cultivars and different application rates, timings and frequencies of azoxystrobin and epoxiconazole. For every day the duration to 37% green flag leaf area ( m ) was extended, N yield was increased by 2.58 kg ha −1 , N per grain by 0.00957 mg, S yield by 0.186 kg ha −1 and S per grain by 0.000718 mg. The N:S ratio decreased by 0.0135 per day. There was no evidence that these responses varied with cultivar. In contrast, the relationship between flag leaf life and N or S Concentration interacted with cultivar. The N and S Concentrations of Shamrock, the cultivar that suffered most from brown rust ( Puccinia recondita ), increased with the extension of flag leaf life whereas the Concentrations of N and S in Malacca, a cultivar more susceptible to Septoria tritici , decreased as flag leaf senescence was delayed. This was because the relationships between m and N and S yields were much better conserved over cultivars than those between m and thousand grain weight (TGW) and grain yield ha −1 .
