Nitrogen Efficiency On Dairy Farms
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Nitrogen Efficiency On Dairy Farms
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Author :
language : en
Publisher:
Release Date : 2005*
Nitrogen Efficiency On Dairy Farms written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005* with Dairy farming categories.
Improving Nitrogen Efficiency On Dairy Farms
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Author : I. Stoković
language : en
Publisher:
Release Date : 2013
Improving Nitrogen Efficiency On Dairy Farms written by I. Stoković and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Nitrogen Efficiency Of Dutch Dairy Farms
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Author : S. Reinhard
language : en
Publisher:
Release Date : 2000
Nitrogen Efficiency Of Dutch Dairy Farms written by S. Reinhard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
In this paper we analyse the cost efficiency and nitrogen efficiency of an unbalanced panel of Dutch dairy farms. Nitrogen efficiency is defined as the ratio of minimal to observed use of nitrogen (N-containing inputs), conditional on output and quasi-fixed inputs. Nitrogen efficiency is computed in a shadow cost system framework. Nitrogen-efficient production is found at the optimal mix of variable inputs, determined by the nitrogen content of these inputs. The optimal nitrogen content ratio is introduced using price distortion factors in the estimated cost function. The mean input-oriented technical efficiency is 84 per cent. The mean nitrogen efficiency is 56 per cent. The nitrogen surplus at the nitrogen-efficient point is less than half of the observed surplus, whereas production costs increase by only 3 per cent.
Nitrogen Use Efficiency And Sustainable Nitrogen Mangement In High Producing Dairy Farms
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Author : Ryan John Higgs
language : en
Publisher:
Release Date : 2009
Nitrogen Use Efficiency And Sustainable Nitrogen Mangement In High Producing Dairy Farms written by Ryan John Higgs and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
The high value of milk protein, increasing feed costs, and growing concerns for the environment have made nitrogen (N) utilization a central component in balancing dairy cow rations. The objectives of this thesis were to evaluate field usable tools to predict N utilization and excretion and help develop protocols to improve N utilization on commercial farms. Specifically this included (1) an assessment of the daily variation in bulk tank milk urea nitrogen (MUN), (2) a computer-based evaluation of the Cornell Net Carbohydrate and Protein System's (CNCPS) ability to predict N excretion, and (3) a farm level evaluation of the ability of the updated CNCPS (v6.1) to develop rations with less environmental impact. In the first study, two data sets (Set A and Set B) containing daily bulk tank (BT) MUN concentrations from commercial farms were obtained from a local cooperative. Milk urea N values were analyzed by source (Set A and B) and by farm (n = 787 and 601 for Set A and B, respectively) across three months (Jan, Feb and March). Mean MUN values from Set A and B followed a normal distribution with the greatest proportion of farms (45% and 42%, respectively) falling within the 11-13 mg/dl range. The majority of variation in both data sets was explained by variability among farms. However, ~10% was attributed to the effect of month while ~20% was unexplained. The unexplained variation could be due to differences in sampling time or technique at the BT, number of milkings, total milk in the BT and/or laboratory error. Significant differences (P
Nitrogen Efficiency Of Dairy Cattle
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Author : Gert van Duinkerken
language : en
Publisher:
Release Date : 2011
Nitrogen Efficiency Of Dairy Cattle written by Gert van Duinkerken and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Nitrogen On Dairy Farms
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Author : Johanna Scheringer
language : en
Publisher:
Release Date : 2002
Nitrogen On Dairy Farms written by Johanna Scheringer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Nitrogen Metabolism In Dairy Cattle
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Author : H. Russell Conrad
language : en
Publisher:
Release Date : 1960
Nitrogen Metabolism In Dairy Cattle written by H. Russell Conrad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Dairy cattle categories.
Whole Farm Nitrogen Efficiency And Balance Compared With The Milk Urea Nitrogen Analysis
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Author : Rhonda A. Swain
language : en
Publisher:
Release Date : 2001
Whole Farm Nitrogen Efficiency And Balance Compared With The Milk Urea Nitrogen Analysis written by Rhonda A. Swain and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Dairying categories.
Modelling The Nitrogen Surplus And The Efficiency Of Nitrogen Use In Flemish Dairy Farms
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Author : Elena Ramírez Fanlo
language : en
Publisher:
Release Date : 2008
Modelling The Nitrogen Surplus And The Efficiency Of Nitrogen Use In Flemish Dairy Farms written by Elena Ramírez Fanlo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Dairy Farming In Uganda
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Author :
language : en
Publisher: ILRI (aka ILCA and ILRAD)
Release Date : 2007-01-01
Dairy Farming In Uganda written by and has been published by ILRI (aka ILCA and ILRAD) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01-01 with Dairy farming categories.