نتایج جستجو برای: spring crops

تعداد نتایج: 91186  

2011
S. B. Bengtsson K. Rosén J. Eriksson A. I. Gärdenäs

The aim of this study is to assess the interception and transfer to edible part of wet deposited 134Cs and 85Sr to spring oilseed rape and spring wheat and the dependency of the intercepted fraction on the development stage e.g. the total plant biomass. The radionuclides, 134Cs and 85Sr, were deposited at six different development stages using a rainfall simulator. The results showed that there...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2003
G T Champion M J May S Bennett D R Brooks S J Clark R E Daniels L G Firbank A J Haughton C Hawes M S Heard J N Perry Z Randle M J Rossall P Rothery M P Skellern R J Scott G R Squire M R Thomas

The Farm Scale Evaluations of genetically modified herbicide-tolerant crops (GMHT) were conducted in the UK from 2000 to 2002 on beet (sugar and fodder), spring oilseed rape and forage maize. The management of the crops studied is described and compared with current conventional commercial practice. The distribution of field sites adequately represented the areas currently growing these crops, ...

Journal: :Biology letters 2006
L G Firbank P Rothery M J May S J Clark R J Scott R C Stuart C W H Boffey D R Brooks G T Champion A J Haughton C Hawes M S Heard A M Dewar J N Perry G R Squire

The Farm Scale Evaluations (FSEs) showed that genetically modified herbicide-tolerant (GMHT) cropping systems could influence farmland biodiversity because of their effects on weed biomass and seed production. Recently published results for winter oilseed rape showed that a switch to GMHT crops significantly affected weed seedbanks for at least 2 years after the crops were sown, potentially cau...

A. iotrowska-Długosz E. Wilczewski, G. Lemańczyk

Biomass of legumes grown as catch crops improves soil properties and thus soil conditions for following crops. The aim of this study was to evaluate the effect of field pea (Pisum sativum L.) grown as a catch crop and used for green manure on soil properties and yielding of spring barley (Hordeum vulgare L.). Field experiments were conducted in 2008-2011 in the randomized block design with ...

2007
W. C. ADLERZ

Watermelon mosaic viruses 1 and 2 (WMV-1 and WMV-2) have both been collected in south and central Florida, but WMV-1 has been most prevalent in the southern and WMV-2 in the central counties. All WMV infections sampled from 1964 to 1969 in Collier and Hendry coun ties of south Florida were caused by WMV-1. Melothria pendula L., a native perennial cucurbitaceous weed, was found to be an over win...

2012
Xuechun Wang Jun Li Shishun Tao

Potato has become one of the primary cash crops in the arid region of the Loess Plateau. However, what and how cereal crops to rotate with potato is better for the farmer’s income and environment is unclear now. 11 potato based rotation systems were simulated in Yulin, using EPIC model based on local information. Results showed 1) Though mean potato yield decreased from 6.84 to 5.38 t/hm, the m...

Journal: :پژوهش های زراعی ایران 0
سعید صوفی زاده اسکندر زند رضا دیهیم فرد سعیده اسماعیل زاده

twentieth century had faced considerable increase in crops yields. nonetheless, it is postulated that world population will reach 10.4 billion until 2050 which means the demand for agricultural crops production should be increased between 60 and 110 percent. in the present study, improvements in grain yields of wheat, maize and rice during the recent decades in iran were studies through analyzi...

Journal: :Intelligent Automation & Soft Computing 2012
Qing Huang Qingbo Zhou Wenbin Wu Limin Wang Li Zhang

This paper presents a method used in China Agriculture Remote Sensing Monitoring System (CHARMS) for automatically identifying crop planting areas and monitoring crop growth conditions at a large scale based on time-series of MODIS NDVI Datasets. In doing that, the characteristics of NDVI time series of spring wheat, spring maize, soybean and rice in Northeastern China were firstly analyzed to ...

2013
Cezary A. Kwiatkowski Barbara Kołodziej Andrzej Woźniak B. Kołodziej A. Woźniak

An improvement in growth, condition, raw material quality, and resistance of vegetable plants to adverse stress conditions or agricultural pests can be achieved by using foliar-applied biostimulators. Cover cropping is also of great importance since it contributes, among others, to a better use of environmental conditions and fertilization by plants. In the period 2009–2011, a field experiment ...

2007
M. G. CROMEY

Samples of grain from 40 New Zealand wheat and barley crops harvested in 2000 were assayed for Fusarium infection. Grain from all crops was infected, and Fusarium incidence ranged from 3 to 52% of grains infected, with a mean of 14%. Incidence of Fusarium was higher in spring wheat than in autumn wheat or spring barley. The highest level of infection (52% grains infected) was found in Otane whe...

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