Albert De Vries
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View article: Targeted reproductive management for lactating Holstein cows: Reproductive and economic outcomes of Double-Ovsynch compared with a targeted approach based on resumption of estrus
Targeted reproductive management for lactating Holstein cows: Reproductive and economic outcomes of Double-Ovsynch compared with a targeted approach based on resumption of estrus Open
Accessibility to automated monitoring devices (AMD) has led to exploration of alternative reproductive management to ovulation synchronization protocols (OvSP) for first postpartum artificial insemination (AI) according to the cow's early …
View article: Data Integration and Analytics in the Dairy Industry: Challenges and Pathways Forward
Data Integration and Analytics in the Dairy Industry: Challenges and Pathways Forward Open
The dairy industry faces significant challenges in data integration and analysis, which are critical for informed decision-making, operational optimization, and sustainability. Data integration—combining data from diverse sources, such as …
View article: The economic impact of purulent vaginal discharge in dairy herds within a single lactation
The economic impact of purulent vaginal discharge in dairy herds within a single lactation Open
The goal of this study was to calculate the cost of purulent vaginal discharge (PVD) in dairy cows. The dataset included 11,051 cows from 16 dairy herds located in 4 regions of the United States. Purulent vaginal discharge was characterize…
View article: Targeted reproductive management for lactating Holstein cows: Economic return
Targeted reproductive management for lactating Holstein cows: Economic return Open
Targeted reproductive management (TRM), employing automated monitoring devices (AMD), is as an alternative to the blanket adoption of ovulation synchronization protocols (OvSP) for first postpartum AI and a means of reducing the use of OvS…
View article: Application of type I and II error analysis to support economic decision-making of using an immunomodulator feed additive
Application of type I and II error analysis to support economic decision-making of using an immunomodulator feed additive Open
The use of the immunomodulator OmniGen-AF (OMN) feed supplement, where the response in milk yield, health, and reproduction is uncertain, allows for an application of type I (use the product when it is not profitable) and type II (do not u…
View article: The role of the ideal of coherence between school and family in valuing cooperative practices of religious education
The role of the ideal of coherence between school and family in valuing cooperative practices of religious education Open
Children’s religious education is vital for the formation of pupils in Dutch Orthodox Protestant schools. Therefore, it seems self-evident that parents and teachers cooperate. This article presents research on parents’ and teachers’ opinio…
View article: Factors associated with the time and magnitude of the nadir body condition score in early lactation and its subsequent effects on fertility of Holstein cows
Factors associated with the time and magnitude of the nadir body condition score in early lactation and its subsequent effects on fertility of Holstein cows Open
The objective of this study was to identify variables associated with the time and magnitude of nadir BCS (nBCS) during early lactation and to characterize the effects of these two measurements on the subsequent pregnancy at first artifici…
View article: Associations of automated body condition scores at dry-off and through early lactation with milk yield of Holstein cows
Associations of automated body condition scores at dry-off and through early lactation with milk yield of Holstein cows Open
The objective of this study was to analyze the associations of body condition score (BCS) and BCS change (∆BCS) during the dry period and the first 100 d of lactation with daily milk yield. Examining the involvement of health status in the…
View article: Association between body condition score fluctuations and pregnancy loss in Holstein cows
Association between body condition score fluctuations and pregnancy loss in Holstein cows Open
The objective of this study was to characterize the associations between body condition score (BCS) and BCS change (∆BCS), determined by an automated camera system during early lactation and close to artificial insemination (AI), and the s…
View article: Effectiveness of the Australian breeding value for heat tolerance at discriminating responses of lactating Holstein cows to heat stress
Effectiveness of the Australian breeding value for heat tolerance at discriminating responses of lactating Holstein cows to heat stress Open
Heat stress has negative consequences for milk production and reproduction of dairy cattle. These adverse effects are likely to increase because of climate change and anticipated increases in milk yield. Some of the variation among cows in…
View article: Dynamics of automatically generated body condition scores during early lactation and pregnancy at first artificial insemination of Holstein cows
Dynamics of automatically generated body condition scores during early lactation and pregnancy at first artificial insemination of Holstein cows Open
The objective of this study was to characterize the association between body condition score (BCS) and BCS change (ΔBCS), determined by an automated camera system at multiple time points, and the subsequent pregnancy per first artificial i…
View article: Practical challenges and potential approaches to predicting low-incidence diseases on farm using individual cow data: A clinical mastitis example
Practical challenges and potential approaches to predicting low-incidence diseases on farm using individual cow data: A clinical mastitis example Open
Clinical mastitis (CM) incidence is considerable in terms of cows affected per year, but cases are much less common in terms of detections per cow per milking. From a modeling perspective, where predictions are made every time any cow is m…
View article: Production costs, economic viability, and risks associated with compost bedded pack, freestall, and drylot systems in dairy farms
Production costs, economic viability, and risks associated with compost bedded pack, freestall, and drylot systems in dairy farms Open
The adoption of intensive production systems, such as compost bedded pack (CB) and freestall (FS), has increased recently in tropical regions, mainly replacing the drylot system (DL). Thus, our objectives were to compare production costs, …
View article: Who Owns and Controls Farming Data?
Who Owns and Controls Farming Data? Open
This publication aims to clarify the concerns regarding data ownership and explain the responsibilities of that ownership, sharing, and benefits in a collaborative smart farming application. Written by Ziwen Yu, Albert De Vries, Yiannis Am…
View article: Effects of limits in milking capacity, housing capacity, or fat quota on economic optimization of dry period lengths
Effects of limits in milking capacity, housing capacity, or fat quota on economic optimization of dry period lengths Open
The economically optimal dry period length (DPL) of dairy cows remains a topic of interest. Increasing daily milk production and improved management of the transition period require frequent evaluation of the optimal DPL. The economically …
View article: Invited review: Toward a common language in data-driven mastitis detection research
Invited review: Toward a common language in data-driven mastitis detection research Open
Sensor technologies for mastitis detection have resulted in the collection and availability of a large amount of data. As a result, scientific publications reporting mastitis detection research have become less driven by approaches based o…
View article: Integrated Decision Support Systems (IDSS) for Dairy Farming: A Discussion on How to Improve Their Sustained Adoption
Integrated Decision Support Systems (IDSS) for Dairy Farming: A Discussion on How to Improve Their Sustained Adoption Open
Dairy farm decision support systems (DSS) are tools which help dairy farmers to solve complex problems by improving the decision-making processes. In this paper, we are interested in newer generation, integrated DSS (IDSS), which additiona…
View article: Associations between dry period length and time to culling and pregnancy in the subsequent lactation
Associations between dry period length and time to culling and pregnancy in the subsequent lactation Open
The association between dry period length (DPL) and time to culling and pregnancy in the subsequent lactation may be important for the economically optimal length of the dry period. Therefore, this study aimed to (1) quantify the associati…
View article: Ranking Dairy Sires Using Genetic Selection Indices Based on Financial Investment Methods versus Lifetime Net Merit: Description and Spreadsheet
Ranking Dairy Sires Using Genetic Selection Indices Based on Financial Investment Methods versus Lifetime Net Merit: Description and Spreadsheet Open
This factsheet describes ways to rank dairy sires using genetic selection indices based on financial investment methods versus Lifetime Net Merit. The factsheet also discusses a spreadsheet that contains the calculations. Written by Michae…
View article: Supplementary materials for: Associations between dry period length and time to culling and pregnancy in the subsequent lactation (Journal of Dairy Science)
Supplementary materials for: Associations between dry period length and time to culling and pregnancy in the subsequent lactation (Journal of Dairy Science) Open
https://doi.org/10.3168/jds.2021-20119 Supplementary materials
View article: The economic cost of metritis in dairy herds
The economic cost of metritis in dairy herds Open
The objective of this study was to estimate the cost of metritis in dairy herds. Data from 11,733 dairy cows from 16 different farms located in 4 different regions of the United States were compiled for up to 305 d in milk, and 11,581 cows…
View article: Piecewise modeling of the associations between dry period length and milk, fat, and protein yield changes in the subsequent lactation
Piecewise modeling of the associations between dry period length and milk, fat, and protein yield changes in the subsequent lactation Open
Our objective was to develop predictive models of 305-d mature-equivalent milk, fat, and protein yields in the subsequent lactation as continuous functions of the number of days dry (DD) in the current lactation. In this retrospective coho…
View article: Invited review: Academic and applied approach to evaluating longevity in dairy cows
Invited review: Academic and applied approach to evaluating longevity in dairy cows Open
In its simplest form, longevity is defined as the ability to live a long life. Within the dairy industry, longevity has been defined and measured in many different ways, and the aim of this review is to disentangle the definitions and prov…
View article: MILK Symposium review: Improving the productivity, quality, and safety of milk in Rwanda and Nepal
MILK Symposium review: Improving the productivity, quality, and safety of milk in Rwanda and Nepal Open
Dairy production plays an important role in the lives of many people in Rwanda and Nepal. The aim of the Feed the Future Innovation Lab for Livestock Systems (LSIL; Gainesville, FL) is to introduce new location-appropriate technologies and…
View article: Advantages and Disadvantages of Various Dry-off Methods for Dairy Cows
Advantages and Disadvantages of Various Dry-off Methods for Dairy Cows Open
This paper reviews 4 dry-off methods for dairy cows. Advantages and disadvantages are discussed. An illustrative budget shows how to calculate the economically most optimal dry off method.
View article: Distribution of seasonality of calving patterns and milk production in dairy herds across the United States
Distribution of seasonality of calving patterns and milk production in dairy herds across the United States Open
Calving patterns and milk production are seasonal throughout the United States; however, the distribution of seasonality, and the extent to which this seasonality is due to direct effects of climate on milk production and reproductive perf…
View article: Late-gestation heat stress impairs daughter and granddaughter lifetime performance
Late-gestation heat stress impairs daughter and granddaughter lifetime performance Open
Records of late-gestation heat stress studies conducted over 10 consecutive years in Florida were pooled and analyzed to test the hypothesis that maternal hyperthermia during late gestation impairs performance of the offspring across multi…
View article: Symposium review: Why revisit dairy cattle productive lifespan?
Symposium review: Why revisit dairy cattle productive lifespan? Open
Dairy cattle productive lifespan averages approximately 3 yr after first calving. Changes in the last decade in reproductive performance, genetic merit, and societal concerns regarding animal welfare and the environmental footprint of dair…
View article: Review: Overview of factors affecting productive lifespan of dairy cows
Review: Overview of factors affecting productive lifespan of dairy cows Open
The average productive lifespan is approximately 3 to 4 years in countries with high-producing dairy cows. This is much shorter than the natural life expectancy of dairy cattle. Dairy farmers continue to cull cows primarily for reasons rel…