The Experts below are selected from a list of 28953 Experts worldwide ranked by ideXlab platform
Djr Cherney - One of the best experts on this subject based on the ideXlab platform.
-
urea and composted cattle manure affect Forage yield and nutritive value in sandy soils of south central vietnam
Grass and Forage Science, 2018Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Improved Forage Management can support increased production in smallholder beef systems. Our objective was to evaluate the effects of mineral nitrogen (urea) and composted cattle manure on Brachiaria cv. Mulato II yield and nutritive value in south-central coastal Vietnam. Study design was a randomized complete block on six farms (blocks), with treatments derived from the factorial combination of five rates of composted cattle manure (0, 4, 8, 12 and 24 Mg DM ha -1 year -1 ) and three urea rates (0, 60 and 120 kg N ha -1 year -1 ), split into six yearly applications. Yield was measured from 2011 to 2013 with 36-day average harvest intervals. Forage nutritive value was measured in September 2011 and December 2012. Highest yields were achieved when both compost and urea were applied at high rates. The initial yield and tiller responses to urea application were not sustained over the duration of the study when no compost was applied. Compost applied in isolation did not increase yield. Compost application increased ash concentration. Urea increased nutrient yield for all Forage nutritive value parameters measured. Composted cattle manure combined with urea benefits grass yield, but high application rates are needed for sustained high yields on sandy soils.
-
impact of Forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south central vietnam
International Journal of Agronomy, 2016Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Increased production in smallholder beef systems requires improved Forage Management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.
D Parsons - One of the best experts on this subject based on the ideXlab platform.
-
urea and composted cattle manure affect Forage yield and nutritive value in sandy soils of south central vietnam
Grass and Forage Science, 2018Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Improved Forage Management can support increased production in smallholder beef systems. Our objective was to evaluate the effects of mineral nitrogen (urea) and composted cattle manure on Brachiaria cv. Mulato II yield and nutritive value in south-central coastal Vietnam. Study design was a randomized complete block on six farms (blocks), with treatments derived from the factorial combination of five rates of composted cattle manure (0, 4, 8, 12 and 24 Mg DM ha -1 year -1 ) and three urea rates (0, 60 and 120 kg N ha -1 year -1 ), split into six yearly applications. Yield was measured from 2011 to 2013 with 36-day average harvest intervals. Forage nutritive value was measured in September 2011 and December 2012. Highest yields were achieved when both compost and urea were applied at high rates. The initial yield and tiller responses to urea application were not sustained over the duration of the study when no compost was applied. Compost applied in isolation did not increase yield. Compost application increased ash concentration. Urea increased nutrient yield for all Forage nutritive value parameters measured. Composted cattle manure combined with urea benefits grass yield, but high application rates are needed for sustained high yields on sandy soils.
-
impact of Forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south central vietnam
International Journal of Agronomy, 2016Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Increased production in smallholder beef systems requires improved Forage Management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.
Keenan C Mcroberts - One of the best experts on this subject based on the ideXlab platform.
-
urea and composted cattle manure affect Forage yield and nutritive value in sandy soils of south central vietnam
Grass and Forage Science, 2018Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Improved Forage Management can support increased production in smallholder beef systems. Our objective was to evaluate the effects of mineral nitrogen (urea) and composted cattle manure on Brachiaria cv. Mulato II yield and nutritive value in south-central coastal Vietnam. Study design was a randomized complete block on six farms (blocks), with treatments derived from the factorial combination of five rates of composted cattle manure (0, 4, 8, 12 and 24 Mg DM ha -1 year -1 ) and three urea rates (0, 60 and 120 kg N ha -1 year -1 ), split into six yearly applications. Yield was measured from 2011 to 2013 with 36-day average harvest intervals. Forage nutritive value was measured in September 2011 and December 2012. Highest yields were achieved when both compost and urea were applied at high rates. The initial yield and tiller responses to urea application were not sustained over the duration of the study when no compost was applied. Compost applied in isolation did not increase yield. Compost application increased ash concentration. Urea increased nutrient yield for all Forage nutritive value parameters measured. Composted cattle manure combined with urea benefits grass yield, but high application rates are needed for sustained high yields on sandy soils.
-
impact of Forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south central vietnam
International Journal of Agronomy, 2016Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Increased production in smallholder beef systems requires improved Forage Management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.
Quirine M. Ketterings - One of the best experts on this subject based on the ideXlab platform.
-
urea and composted cattle manure affect Forage yield and nutritive value in sandy soils of south central vietnam
Grass and Forage Science, 2018Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Improved Forage Management can support increased production in smallholder beef systems. Our objective was to evaluate the effects of mineral nitrogen (urea) and composted cattle manure on Brachiaria cv. Mulato II yield and nutritive value in south-central coastal Vietnam. Study design was a randomized complete block on six farms (blocks), with treatments derived from the factorial combination of five rates of composted cattle manure (0, 4, 8, 12 and 24 Mg DM ha -1 year -1 ) and three urea rates (0, 60 and 120 kg N ha -1 year -1 ), split into six yearly applications. Yield was measured from 2011 to 2013 with 36-day average harvest intervals. Forage nutritive value was measured in September 2011 and December 2012. Highest yields were achieved when both compost and urea were applied at high rates. The initial yield and tiller responses to urea application were not sustained over the duration of the study when no compost was applied. Compost applied in isolation did not increase yield. Compost application increased ash concentration. Urea increased nutrient yield for all Forage nutritive value parameters measured. Composted cattle manure combined with urea benefits grass yield, but high application rates are needed for sustained high yields on sandy soils.
-
impact of Forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south central vietnam
International Journal of Agronomy, 2016Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Increased production in smallholder beef systems requires improved Forage Management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.
-
Plant and soil elemental status as influenced by multi-year nitrogen and potassium fertilization
Journal of Plant Nutrition, 2004Co-Authors: J. H. Cherney, Quirine M. Ketterings, J.l. OrloskiAbstract:Abstract Forage Management of perennial grass grown under potassium (K)-limiting soil conditions is not well understood. Our objective was to evaluate the elemental status of shoots and roots of reed canarygrass (Phalaris arundinaceae L.) as well as the soil fertility profile (0–90 cm) after five years of differential nitrogen (N) and K fertilization in a two-cut Management system. Three N (0, 112, or 224 kg N ha−1) and three K fertilizer treatments (0, 56, and 112 kg K ha−1) were split-applied to reed canarygrass on a Williamson silt loam (coarse-silty, mixed, active, mesic Typic Fragiudepts) soil type in central New York State. At the Fall harvest in the fifth year, plant samples from low and high K fertilized plots all at the high N fertilization rate were cut at a 10-cm stubble height and sectioned into 10 segments vertically through the canopy. In addition, Forage, root and soil samples were taken from all treatments to evaluate the distribution of elements under low soil K availability. Above ground...
T T Hai - One of the best experts on this subject based on the ideXlab platform.
-
urea and composted cattle manure affect Forage yield and nutritive value in sandy soils of south central vietnam
Grass and Forage Science, 2018Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Improved Forage Management can support increased production in smallholder beef systems. Our objective was to evaluate the effects of mineral nitrogen (urea) and composted cattle manure on Brachiaria cv. Mulato II yield and nutritive value in south-central coastal Vietnam. Study design was a randomized complete block on six farms (blocks), with treatments derived from the factorial combination of five rates of composted cattle manure (0, 4, 8, 12 and 24 Mg DM ha -1 year -1 ) and three urea rates (0, 60 and 120 kg N ha -1 year -1 ), split into six yearly applications. Yield was measured from 2011 to 2013 with 36-day average harvest intervals. Forage nutritive value was measured in September 2011 and December 2012. Highest yields were achieved when both compost and urea were applied at high rates. The initial yield and tiller responses to urea application were not sustained over the duration of the study when no compost was applied. Compost applied in isolation did not increase yield. Compost application increased ash concentration. Urea increased nutrient yield for all Forage nutritive value parameters measured. Composted cattle manure combined with urea benefits grass yield, but high application rates are needed for sustained high yields on sandy soils.
-
impact of Forage fertilization with urea and composted cattle manure on soil fertility in sandy soils of south central vietnam
International Journal of Agronomy, 2016Co-Authors: Keenan C Mcroberts, Quirine M. Ketterings, D Parsons, T T Hai, N H Quan, Charles F Nicholson, Djr CherneyAbstract:Increased production in smallholder beef systems requires improved Forage Management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattle manure (0, 4, 8, 12, and 24 Mg DM/ha per yr) and three urea rates (0, 60, and 120 kg N/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.