Development of nutrient management strategies based on mapping of nitrogen flows and balances in dairy production systems in Uganda

Magnesium (Mg) plays a vital role in photosynthesis, dry matter production and carbon partitioning in sink organs. Hence, four permanent manurial experiments (20–27 years of duration) under the auspices of All India Coordinated Research Project for Dryland Agriculture (AICRPDA) network centres across diverse agro-ecological regions were carried out to examine the soil exchangeable Mg (ex-Mg), crop uptake and overall Mg balance. Groundnut (peanut), finger millet, rice–lentil sequence and post rainy sorghum were the major crops or cropping systems followed in four permanent manure experiments at Anantapuram, Bengaluru, Varanasi and Solapur, respectively. Nutrient management in all experiments involved control (no addition of nutrients), 100% organic, 100% chemical, and integration of organic and chemical. Except in the finger millet-based system, mean ex-Mg status in the entire profile was higher than the sufficiency level (1.0 cmol(+) kg–1 as a critical limit). Status of ex-Mg (cmol(+) kg–1 soil) in soil profiles was in the order: Solapur (3.80) > Varanasi (2.07) > Anantapuram (1.06) > Bengaluru (0.44). A uniform distribution of ex-Mg was observed in plots that received integrated application of organic and chemical fertilisers. In general, improved status of profile ex-Mg (cmol(+) kg–1) over the control was observed in soils under groundnut (0.19–0.78), finger millet (1.90–3.20), and post rainy sorghum (6.50–7.60, except 4.20 in 100% NPK) cropping. Overall, ex-Mg status and balance of different soil types under diverse crop production systems was influenced by several factors, some of which include soil type with varying mineralogy, particle size distribution, nutrient management strategies and rainfall. Significant positive relationships were observed between ex-Mg status and clay content (R2 = 0.94), soil pH (R2 = 0.92), cation exchange capacity (R2 = 0.98) and mean air temperature (R2 = 0.22), whereas a weak relationship was observed with rainfall (R2 = 0.01). The study gives an account of Mg balance in major Indian soil types and recommends further attention on Mg nutrition in current intensive agriculture.

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Typology of Dairy Production Systems Based on Management Strategies in Paraná State, Brazil

Tropical Animal Science Journal ◽

10.5398/tasj.2021.44.1.123 ◽

2021 ◽

Vol 44 (1) ◽

pp. 123-130

Author(s):

R. C. M. Tramontini ◽

F. I. Bánkuti ◽

M. S. S. Pozza ◽

E. M. Massuda ◽

J. C. Damasceno ◽

...

Keyword(s):

Production Systems ◽

Management Strategies ◽

Dairy Production

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Connecting Crop Nutrient Use Efficiency to Future Soil Productivity

10.24047/bc10248 ◽

2018 ◽

Vol 102 (4) ◽

pp. 8-10

Author(s):

Fernando García ◽

Andrés Grasso ◽

María González Sanjuan ◽

Adrián Correndo ◽

Fernando Salvagiotti

Keyword(s):

Nutrient Management ◽

Nutrient Use Efficiency ◽

Management Strategies ◽

Crop Productivity ◽

Soil Productivity ◽

Nutrient Use ◽

Grain Crop ◽

Wide Scale ◽

Use Efficiency

Trends over the past 25 years indicate that Argentina’s growth in its grain crop productivity has largely been supported by the depletion of the extensive fertility of its Pampean soils. Long-term research provides insight into sustainable nutrient management strategies ready for wide-scale adoption.

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Legumes increase grassland productivity with no effect on nitrous oxide emissions

Plant and Soil ◽

10.1007/s11104-019-04338-w ◽

2019 ◽

Vol 446 (1-2) ◽

pp. 163-177 ◽

Cited By ~ 3

Author(s):

Arlete S. Barneze ◽

Jeanette Whitaker ◽

Niall P. McNamara ◽

Nicholas J. Ostle

Keyword(s):

Management Practices ◽

Production Systems ◽

N Uptake ◽

Relative Proportion ◽

Management Strategies ◽

Ghg Emissions ◽

Chemical Properties ◽

Nitrous Oxide Emissions ◽

Mineral N ◽

Grassland Productivity

Abstract Aims Grasslands are important agricultural production systems, where ecosystem functioning is affected by land management practices. Grass-legume mixtures are commonly cultivated to increase grassland productivity while reducing the need for nitrogen (N) fertiliser. However, little is known about the effect of this increase in productivity on greenhouse gas (GHG) emissions in grass-legume mixtures. The aim of this study was to investigate interactions between the proportion of legumes in grass-legume mixtures and N-fertiliser addition on productivity and GHG emissions. We tested the hypotheses that an increase in the relative proportion of legumes would increase plant productivity and decrease GHG emissions, and the magnitude of these effects would be reduced by N-fertiliser addition. Methods This was tested in a controlled environment mesocosm experiment with one grass and one legume species grown in mixtures in different proportions, with or without N-fertiliser. The effects on N cycling processes were assessed by measurement of above- and below-ground biomass, shoot N uptake, soil physico-chemical properties and GHG emissions. Results Above-ground productivity and shoot N uptake were greater in legume-grass mixtures compared to grass or legume monocultures, in fertilised and unfertilised soils. However, we found no effect of legume proportion on N2O emissions, total soil N or mineral-N in fertilised or unfertilised soils. Conclusions This study shows that the inclusion of legumes in grass-legume mixtures positively affected productivity, however N cycle were in the short-term unaffected and mainly affected by nitrogen fertilisation. Legumes can be used in grassland management strategies to mitigate climate change by reducing crop demand for N-fertilisers.

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Assessing and reducing the environmental impact of dairy production systems in the northern US in a changing climate

Agricultural Systems ◽

10.1016/j.agsy.2021.103170 ◽

2021 ◽

Vol 192 ◽

pp. 103170

Author(s):

Karin Veltman ◽

C. Alan Rotz ◽

Larry Chase ◽

Joyce Cooper ◽

Chris E. Forest ◽

...

Keyword(s):

Environmental Impact ◽

Production Systems ◽

Dairy Production ◽

Changing Climate

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Understanding the dairy production systems in rural settlements in the Brazilian semi-arid region: characterization, typology, and holistic perception

Tropical Animal Health and Production ◽

10.1007/s11250-021-02840-x ◽

2021 ◽

Vol 53 (4) ◽

Author(s):

Maria Samires Martins Castro ◽

Delano de Sousa Oliveira ◽

Raquel Oliveira dos Santos Fontenelle ◽

Ana Paula Araújo do Nascimento ◽

Robson Mateus Freitas Silveira ◽

...

Keyword(s):

Arid Region ◽

Production Systems ◽

Dairy Production ◽

Rural Settlements ◽

Holistic Perception ◽

Semi Arid Region ◽

Semi Arid

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Use of information and communication technologies in small-scale dairy production systems in central Mexico

Experimental Agriculture ◽

10.1017/s0014479720000319 ◽

2020 ◽

Vol 56 (5) ◽

pp. 767-779

Author(s):

Juan de Dios García-Villegas ◽

Anastacio García-Martínez ◽

Carlos Manuel Arriaga-Jordán ◽

Monica Elizama Ruiz-Torres ◽

Adolfo Armando Rayas-Amor ◽

...

Keyword(s):

Cluster Analysis ◽

Production Systems ◽

Communication Technologies ◽

Small Scale ◽

Central Mexico ◽

Dairy Production ◽

Dairy Farmers ◽

Use Of Technology ◽

Group 2 ◽

Small Scale Dairy

AbstractThe objective of the study was to characterize small-scale dairy production systems to identify the technological preferences according to the farmer and farm characteristics and to analyze the importance and role of the information communication technologies (ICTs) in the dissemination of information related to management and livestock activities. To collect the data, a survey was applied to 170 small-scale dairy farmers from central Mexico. To characterize the farms, a factor analysis (FA) and cluster analysis (CA) were performed. To compare and identify differences between groups, a Kruskal–Wallis test was conducted. Four factors that explain 70.93% of the accumulated variance were identified; these factors explain the use of technology, production characteristics, social connections, and use of ICTs. The cluster analysis identified four groups. Group 1 was integrated by farmers with more experience and the largest farms. Group 2 had higher studies and use of ICTs. Group 3 was formed by young farmers but had a low use of technology. Group 4 contained older farmers with a low use of technology. The young farmers with higher studies have begun to incorporate ICTs into their daily activities on the farm, as observed in Group 2. Smartphones were the most used and were considered important by the farmers of the four groups, since they enable interaction with other farmers and the dissemination of topics of interest related with the farm. In conclusion, four group of farmers were differentiated; therefore, different extension approaches should be implemented to take into account the preferences and the technologies considered most important for each group. The ICTs are emerging technologies among small-scale dairy farmers to communicate information related to livestock management, mainly by young farmers with studies of secondary, as observed in Group 2.

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Soil carbon dynamics in Brazilian atlantic forest converted into pasture‐based dairy production systems

Agronomy Journal ◽

10.1002/agj2.20578 ◽

2020 ◽

Author(s):

Patricia Perondi Anchão Oliveira ◽

Paulo Henrique Mazza Rodrigues ◽

Maria Fernanda Ferreira Menegucci Praes ◽

André Faria Pedroso ◽

Bia Anchão Oliveira ◽

...

Keyword(s):

Soil Carbon ◽

Atlantic Forest ◽

Production Systems ◽

Carbon Dynamics ◽

Dairy Production ◽

Brazilian Atlantic Forest ◽

Soil Carbon Dynamics

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Cost analysis and economic optimization of small-scale dairy production systems in Mexico

Livestock Science ◽

10.1016/j.livsci.2020.104028 ◽

2020 ◽

Vol 237 ◽

pp. 104028

Author(s):

Jesús Armando Salinas-Martínez ◽

Rodolfo Rogelio Posadas-Domínguez ◽

Leydi Diana Morales-Díaz ◽

Samuel Rebollar-Rebollar ◽

Rolando Rojo-Rubio

Keyword(s):

Cost Analysis ◽

Production Systems ◽

Small Scale ◽

Dairy Production ◽

Economic Optimization ◽

Small Scale Dairy

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Relative Distribution and Incidence of Viruses Associated with Disease Outbreaks in Tomato Fields in Trinidad

Plant Health Progress ◽

10.1094/php-2006-0309-01-rs ◽

2006 ◽

Vol 7 (1) ◽

pp. 29

Author(s):

S. N. Rampersad

Keyword(s):

Production Systems ◽

Management Strategies ◽

Disease Outbreaks ◽

Tobacco Etch Virus ◽

The Other ◽

Multiple Infections ◽

Relative Distribution ◽

Tomato Production ◽

Viral Pathogen ◽

High Incidence

Tomato production in Trinidad has suffered considerable losses in yield and fruit quality due to infections of hitherto surmised etiology. In order to develop strategies for controlling viral diseases in tomato, the relative distribution and incidence of seven viruses that commonly infect tomato were determined. Of the 362 samples tested, Potato yellow mosaic Trinidad virus (PYMTV) was found in every farm except two and was present at relatively high incidence throughout the country. Tobacco mosaic virus (TMV) and Tobacco etch virus (TEV) were found in fewer farms and at lower incidences while the other viruses were absent. Single infections of either virus were more common than double infections and multiple infections were rare but present. The results indicated that PYMTV is the predominant and most important viral pathogen in tomato production systems in Trinidad; however, begomovirus disease management strategies will also have to accommodate controls Accepted for publication 10 January 2006. Published 9 March 2006.

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