Farming ducks in a maize field: a new and potential crop-livestock system from China

2021 ◽  
Vol 41 (6) ◽  
Author(s):  
Kaixian Wu ◽  
Changbin Pan ◽  
Shiyong Zhou ◽  
Feng Zhou ◽  
Guangqiang Long ◽  
...  
Keyword(s):  
Maize Field ◽  
Livestock System

Influence of NPK fertilization on weed flora in maize field

2014 ◽  
Vol 63 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Éva Lehoczky ◽  
M. Kamuti ◽  
N. Mazsu ◽  
J. Tamás ◽  
D. Sáringer-Kenyeres ◽  
...  
Keyword(s):  
Plant Nutrition ◽  
Crop Production ◽  
N Availability ◽  
Weed Species ◽  
Negative Effects ◽  
Production Factors ◽  
Maize Field ◽  
Weed Flora ◽  
Npk Fertilization

Plant nutrition is one of the most important intensification factors of crop production. The utilization of nutrients, however, may be modified by a number of production factors, including weed presence. Thus, the knowledge of occurring weed species, their abundance, nutrient and water uptake is extremely important to establish an appropriate basis for the evaluation of their risks or negative effects on crops. That is why investigations were carried out in a long-term fertilization experiment on the influence of different nutrient supplies (Ø, PK, NK, NPK) on weed flora in maize field.The weed surveys recorded similar diversity on the experimental area: the species of A. artemisiifolia, S. halepense and D. stramonium were dominant, but C. album and C. hybridum were also common. These species and H. annuus were the most abundant weeds.Based on the totalized and average data of all treatments, density followed the same tendency in the experimental years. It was the highest in the PK treated and untreated plots, and significantly exceeded the values of NK fertilized areas. Presumably the better N availability promoted the development of nitrophilic weeds, while the mortality of other small species increased.Winter wheat and maize forecrops had no visible influence on the diversity and the intensity of weediness. On the contrary, there were consistent differences in the density of certain weed species in accordance to the applied nutrients. A. artemisiifolia was present in the largest number in the untreated control and PK fertilized plots. The density of S. halepense and H. annuus was also significantly higher in the control areas. The number of their individuals was smaller in those plots where N containing fertilizers were used. Contrary to them, the density of D. stramonium, C. album and C. hybridum was the highest in the NPK treatments.

FORBEEF: A forage-livestock system computer model used as a teaching aid for decision making

1987 ◽  
Vol 16 (2) ◽  
pp. 85-87
Author(s):  
W. C. Stringer ◽  
N. S. Hill ◽  
B. W. Pinkerton
Keyword(s):  
Decision Making ◽  
Computer Model ◽  
Teaching Aid ◽  
Livestock System

scholarly journals SOYBEAN CULTIVATION IN A CROP-LIVESTOCK SYSTEM WITH Azospirillum brasilense INOCULATION

2018 ◽  
Vol 31 (1) ◽  
pp. 1-8
Author(s):  
MARCOS DA SILVA BRUM ◽  
THOMAS NEWTON MARTIN ◽  
VINÍCIUS SANTOS DA CUNHA ◽  
LUIZ FERNANDO TELEKEN GRANDO ◽  
ALEX TAGLIAPIETRA SCHONELL
Keyword(s):  
Azospirillum Brasilense ◽  
Block Design ◽  
Experimental Period ◽  
Height Control ◽  
Grain Productivity ◽  
Randomized Complete Block Design ◽  
Grazing Systems ◽  
Soybean Plants ◽  
Santa Maria ◽  
Livestock System

ABSTRACT The objective of this study was to evaluate the phytomorphological parameters of soybean in a crop-livestock system inoculated with Azospirillum brasilense. The experiment was conducted in Santa Maria, Brazil, for two agricultural years (2 Paper extracted from the doctoral thesis of the first author. 012/2013 and 2013/2014) in a randomized complete block design with three replications. In the winter, the black oat and ryegrass pasture was managed with sheep under different grazing systems: (I) - a conventional grazing (CG) system, where the animals remained in the pasture throughout the experimental period without any pasture height control; (II, III, and IV) - systems with post-grazing pasture heights of 10, 20, and 30 cm, respectively; and (NG) - one control without grazing. All treatments received two nitrogen doses (50 and 100 kg ha-1) and inoculation or no inoculation (A. brasilense). The soybean cultivar BMX Potência RR was sown using no-tillage on 16 November 2012 and 1 December 2013. In each plot, seven rows of plants with spacing of 0.45 m were used, and in four rows, the seeds were inoculated with the bacterium A. brasilense. The phytomorphological variables and grain productivity were evaluated. In a croplivestock system, soybean has better productivity when established on black oat and ryegrass pasture managed with post-grazing pasture heights of between 20 and 30 cm. Areas under conventional grazing in the winter led to smaller soybean plants with lower first and last pod heights. Inoculation with A. brasilense should not be used alone in soybean cultivation.

Factors associated with respiratory symptoms among herbicide applicators and assistant applicators in maize field

2021 ◽  
pp. 1-8
Author(s):  
Sutthinee Sidthilaw ◽  
Ratana Sapbamrer ◽  
Chaicharn Pothirat ◽  
Klintean Wunnapuk ◽  
Supakit Khacha-ananda
Keyword(s):  
Respiratory Symptoms ◽  
Factors Associated ◽  
Maize Field

scholarly journals Automating Uniformity Trials to Optimize Precision of Agronomic Field Trials

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1254
Author(s):  
Marcus Jones ◽  
Marin Harbur ◽  
Ken J. Moore
Keyword(s):  
Web Application ◽  
Unit Area ◽  
Field Trials ◽  
State University ◽  
Iowa State University ◽  
Plot Size ◽  
Maize Field ◽  
Process Uniformity ◽  
Field Plots ◽  
Uniformity Trials

Plot size has an important impact on variation among plots in agronomic field trials, but is rarely considered during the design process. Uniformity trials can inform a researcher about underlying variance, but are seldom used due to their laborious nature. The objective of this research was to describe variation in maize field trials among field plots of varying size and develop a tool to optimize field-trial design using uniformity-trial statistics. Six uniformity trials were conducted in 2015–2016 in conjunction with Iowa State University and WinField United. All six uniformity trials exhibited a negative asymptotic relationship between variance and plot size. Variance per unit area was reduced over 50% with plots 41.8 m2 in size and over 75% when using a plot size >111.5 m2 compared to a 13.9 m2 plot. Plot shape within a fixed plot size did not influence variance. The data illustrated fewer replicates were needed as plot size increased, since larger plots reduced variability. Use of a Shiny web application is demonstrated that allows a researcher to upload a yield map and consider uniformity-trial statistics to inform plot size and replicate decisions.

scholarly journals Erratum: Arnuti, F., et al. Sheep Dung Composition and Phosphorus and Potassium Release Affected by Grazing Intensity and Pasture Development Stage in an Integrated Crop-Livestock System. Agronomy 2020, 10, 1162

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 126
Author(s):  
Fernando Arnuti ◽  
Luiz Gustavo de O. Denardin ◽  
Pedro Arthur de A. Nunes ◽  
Lucas A. Alves ◽  
Diego Cecagno ◽  
...  
Keyword(s):  
Grazing Intensity ◽  
Development Stage ◽  
Potassium Release ◽  
Phosphorus And Potassium ◽  
Published Paper ◽  
Livestock System

The authors would like to make the following correction to the published paper [...]

scholarly journals Grazing intensity and stocking methods on animal production and methane emission by grazing sheep: Implications for integrated crop–livestock system

2014 ◽  
Vol 190 ◽  
pp. 112-119 ◽  
Author(s):  
Jean Victor Savian ◽  
Armindo Barth Neto ◽  
Diego Bitencourt de David ◽  
Carolina Bremm ◽  
Radael Marinho Três Schons ◽  
...  
Keyword(s):  
Methane Emission ◽  
Grazing Intensity ◽  
Animal Production ◽  
Grazing Sheep ◽  
Livestock System
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