scholarly journals Weed Control and Winter Wheat Crop Yield With the Application of Herbicides, Nitrogen Fertilizers, and Their Mixtures With Humic Growth Regulators

2021 ◽  
Vol 74 ◽  
Author(s):  
Irina Korotkova ◽  
Mykola Marenych ◽  
Volodymyr Hanhur ◽  
Oksana Laslo ◽  
Oksana Chetveryk ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Weed Control ◽  
Block Design ◽  
Nitrogen Fertilizers ◽  
Wheat Crop ◽  
Yield Increase ◽  
Physiologically Active Substances ◽  
Winter Wheat Cultivars ◽  
Winter Wheat Crop

Abstract The aim of the present study was to determine the efficacy of the application of mixtures containing various combinations of humic substances, with herbicides and nitrogen fertilizers, in weed control and optimizing the plant nutrition system. We also aimed to evaluate the influence of these substances on winter wheat productivity. Five Ukrainian winter wheat cultivars (‘Kryzhynka,’ ‘Smuhlyanka,’ ‘Slavna,’ ‘Kubus,’ and ‘Mulan’) were sown in a randomized complete block design, with three replications, in the years 2014–2019. The analysis of the effect of the compositions containing herbicides, with various physiologically active substances, in a mixture with humic preparations (Humifield, 4R Foliar concentrate) was performed by counting weeds per square meter in each experimental plot. The best performance in weed control, including perennial species, was obtained from using a mixture of Grodil Maxi herbicide with the humic preparation, Humifield. The crop treatment of this mixture resulted in a 23.6% reduction in weeds, compared to the treatment with the Grodil Maxi herbicide only. At the same time, the complex application of a number of herbicides in a mixture with the humic preparation, 4R Foliar concentrate led to the opposite effect. Various applications of mixtures of humates (4R Foliar concentrate, 5R SoilBoost) with nitrogen fertilizers (ammonium nitrate; carbamide-ammonium mixture) to optimize the winter wheat nutritional system and yield increases have been studied. The highest yield increase of 20%–22% was harvested in the plots treated with 5R SoilBoost and 4R Foliar concentrate plus ammonium nitrate. In addition, the efficacy of wheat crop foliar feeding with mixtures of humates, plus a carbamide-ammonia mixture, in different phases of vegetation has been established. A yield increase of 10.0%–21.4% resulting from the use of such compositions was obtained.

scholarly journals The influence of different nitrogen forms and application time on winter wheat

2017 ◽  
Vol 24 (3) ◽  
Author(s):  
Vita Smalstienė ◽  
Irena Pranckietienė ◽  
Rūta Dromantienė ◽  
Gvidas Šidlauskas
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Triticum Aestivum L ◽  
Nitrogen Fertilizers ◽  
Wheat Crop ◽  
Nitrogen Form ◽  
Amide Nitrogen ◽  
Nitrogen Forms ◽  
Ammonium N ◽  
Winter Wheat Crop

The research was carried out at the Experimental Station of Aleksandras Stulginskis University during 2015–2016 on medium textured loamy carbonaceous leached soil – Cal(ca)ri-Epihypogleyic Luvisols. The soil of the experimental field was the following: pHKCl 6.8–7.2; phosphorus (P2O5) – 423– 429 mg kg–1; potassium (K2O) – 157–163 mg kg–1; humus – 2.47–2.82%. The researchers explored the winter wheat crop (Triticum aestivum L.) variety ‘Skagen’ fertilized with amide (N-NH2), ammonium (N-NH4) and nitrate (N-NO3) forms of nitrogen fertilizers in different tillering stages (BBCH 21–29). 7 days after winter wheat was fertilized, the level of mineral nitrogen in the soil was on average 23.9% higher using ammonium–nitrate nitrogen form fertilizers than using amide nitrogen form ones. The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used. The biggest effect on the index of chlorophyll and the area of leafs was achieved 16 days after the start of vegetation when plants were fertilized with ammonium–nitrate fertilizers. Plants fertilized with ammonium–nitrate fertilizers gave the biggest yield 4 days after the start of vegetation. Data of the experiment showed strong and statistically reliable bonds of the correlation between the grain yield and the time of fertilization with nitrogen fertilizers (ήamide nitrogen fertilizers = 0.850* and ήammonium–nitrate fertilizers = 0.878*).

Influence of Nitrogen Rates and Wheat (Triticum aestivum) Cultivars on Weed Control

Weed Science ◽  
1992 ◽  
Vol 40 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Stephen A. Valenti ◽  
Gail A. Wicks
Keyword(s):  
Winter Wheat ◽  
Weed Control ◽  
Grain Sorghum ◽  
Wheat Crop ◽  
Green Foxtail ◽  
Before And After ◽  
Winter Wheat Cultivars ◽  
N Fertility ◽  
N Rates ◽  
Nitrogen Rates

Experiments were conducted to determine the influence of nitrogen (N) fertility and winter wheat cultivars on weed infestations in a winter wheat-ecofallow sorghum-fallow rotation near North Platte, NE. Centurk 78 and Lancota winter wheat suppressed density and growth of barnyardgrass and green foxtail significantly more than Eagle winter wheat before and after wheat harvest. Increasing N rates applied to winter wheat decreased annual grass weed population and weed yields. However, 67 and 101 kg N ha−1reduced winter wheat grain yields compared to 34 kg N ha−1. Plots treated at 2.8 plus 0.3 kg ai ha−1of atrazine plus paraquat 31 d after wheat harvest had more barnyardgrass before grain sorghum planting in 1983 than plots treated 17 d after wheat harvest but the reverse was true for green foxtail after grain sorghum emergence in 1984. Increasing N rates from 34 kg ha−1to 67 and 101 kg ha−1in the previous wheat crop decreased weed density before and after grain sorghum planting. There was no advantage in weed control in the grain sorghum from applying N to winter wheat in the fall vs. spring.

scholarly journals Analysis of dynamics for 15 vegetation indices based on Sentinel-2A image data for the test sites of winter wheat crop different on the state from each other within the forest-steep zone in Ukraine

2018 ◽  
pp. 32-39
Author(s):  
Galina Zholobak ◽  
Oksana Sybirtseva ◽  
Mariana Vakolyuk ◽  
Inna Romanciuc
Keyword(s):  
Winter Wheat ◽  
Vegetation Indices ◽  
Image Data ◽  
Early Summer ◽  
Wheat Crop ◽  
Winter Wheat Cultivars ◽  
Winter Wheat Crop ◽  
Analysis Of Dynamics ◽  
Sentinel 2A ◽  
Reflecting Surface

Dynamics of 15 vegetation indices estimated from the Sentinel-2A images within two test sites with the area of 1 ha for the production crops of two winter wheat cultivars (Bohdana and Skagen) are analyzed for winter dormancy and spring-early summer in 2016. The decrease of total nitrogen content in dry matter of the plant organs, which are formed the reflecting surface of the vegetation cover from the booting stage to milk one is consistent with the behavior of the Green NDVI (740, 560) for the both test sites of winter wheat cover. Dynamics of the other 14 indices have been analyzed under the conditions of the deterioration of phytosanitary situation for the winter wheat crop of Bohdana cultivar.

The fate of labelled15N urea and ammonium nitrate applied to a winter wheat crop

1988 ◽  
Vol 112 (2) ◽  
pp. 205-214 ◽  
Author(s):  
S. Recous ◽  
C. Fresneau ◽  
G. Faurie ◽  
B. Mary
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Wheat Crop ◽  
Winter Wheat Crop

scholarly journals Comparison of Proximal and Remote Sensing for the Diagnosis of Crop Status in Site-Specific Crop Management

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 19
Author(s):  
Jiří Mezera ◽  
Vojtěch Lukas ◽  
Igor Horniaček ◽  
Vladimír Smutný ◽  
Jakub Elbl
Keyword(s):  
Remote Sensing ◽  
Winter Wheat ◽  
Vegetation Indices ◽  
Wheat Yield ◽  
Nitrogen Fertilizers ◽  
Wheat Crop ◽  
Significant Difference ◽  
Winter Wheat Crop ◽  
The Individual ◽  
Sentinel 2

The presented paper deals with the issue of selecting a suitable system for monitoring the winter wheat crop in order to determine its condition as a basis for variable applications of nitrogen fertilizers. In a four-year (2017–2020) field experiment, 1400 ha of winter wheat crop were monitored using the ISARIA on-the-go system and remote sensing using Sentinel-2 multispectral satellite images. The results of spectral measurements of ISARIA vegetation indices (IRMI, IBI) were statistically compared with the values of selected vegetation indices obtained from Sentinel-2 (EVI, GNDVI, NDMI, NDRE, NDVI and NRERI) in order to determine potential hips. Positive correlations were found between the vegetation indices determined by the ISARIA system and indices obtained by multispectral images from Sentinel-2 satellites. The correlations were medium to strong (r = 0.51–0.89). Therefore, it can be stated that both technologies were able to capture a similar trend in the development of vegetation. Furthermore, the influence of climatic conditions on the vegetation indices was analyzed in individual years of the experiment. The values of vegetation indices show significant differences between the individual years. The results of vegetation indices obtained by the analysis of spectral images from Sentinel-2 satellites varied the most. The values of winter wheat yield varied between the individual years. Yield was the highest in 2017 (7.83 t/ha), while the lowest was recorded in 2020 (6.96 t/ha). There was no statistically significant difference between 2018 (7.27 t/ha) and 2019 (7.44 t/ha).

The fate of labelled15N urea and ammonium nitrate applied to a winter wheat crop

1988 ◽  
Vol 112 (2) ◽  
pp. 215-224 ◽  
Author(s):  
S. Recous ◽  
J. M. Machet ◽  
B. Mary
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Wheat Crop ◽  
Winter Wheat Crop

The herbicide NordStrim on a winter wheat crop

2021 ◽  
pp. 21-22
Author(s):  
V.A. Nesterenko ◽  
T.S. Krylova
Keyword(s):  
Winter Wheat ◽  
Wheat Crop ◽  
Winter Wheat Crop

Characterisation of fungal diseases on winter wheat crop using proximal and remote multispectral imaging

2019 ◽  
Author(s):  
R. Bebronne ◽  
A. Michez ◽  
V. Leemans ◽  
P. Vermeulen ◽  
B. Dumont ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Multispectral Imaging ◽  
Fungal Diseases ◽  
Wheat Crop ◽  
Winter Wheat Crop

Effect of Winter Wheat Crop Residue on No-Till Corn Growth and Development

2007 ◽  
Vol 99 (2) ◽  
pp. 549-555 ◽  
Author(s):  
Anatoliy G. Kravchenko ◽  
Kurt D. Thelen
Keyword(s):  
Winter Wheat ◽  
Growth And Development ◽  
Crop Residue ◽  
Wheat Crop ◽  
No Till ◽  
Winter Wheat Crop
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