precision fertilizer application Articles

  • Precise fertilizer management - Grass analysis by X-ray fluorescence spectrometry

    A significant proportion of agricultural land in Europe is grass for livestock grazing. For example, in the UK as a whole, the combined area of grassland is around 6,997,000 hectares, nearly 38% of the total agricultural area [2]. In NorthernIreland, where clay soils and a temperate climate are particularly suitable for grass production, this percentage is much higher. Here about 95% of farmland ...

  • Many Countries Reaching Diminishing Returns in Fertilizer Use

    When German chemist Justus von Liebig demonstrated in 1847 that the major nutrients that plants removed from the soil could be applied in mineral form, he set the stage for the development of the fertilizer industry and a huge jump in world food production a century later. Growth in food production during the nineteenth century came primarily from expanding cultivated area. It was not until the ...


    By Earth Policy Institute

  • Will variable-rate nitrogen fertilization using corn canopy reflectance sensing deliver environmental benefits?

    Within-field variability of corn (Zea mays L.) N need calls for development of precision fertilizer application strategies. One approach many are investigating is in-season canopy reflectance sensing. Justification for this strategy partly rests with the premise it will improve N use and reduce N loss from fields. The objective of this study was to determine the potential environmental benefits ...

  • Nitrogen recommendations for corn: An on-the-go sensor compared with current recommendation methods

    Precision agriculture technologies provide the capability to spatially vary N fertilizer applied to corn (Zea mays L.), potentially improving N use efficiency. The focus of this study was to evaluate the potential of improving N recommendations based on crop canopy reflectance. Corn was grown at four field sites in each of 2 yr in Centre County, Pennsylvania. Preplant treatments included: zero ...

  • A simple spectral index using reflectance of 735 nm to assess nitrogen status of rice canopy

    Spatial distribution of canopy N status is the primary information needed for precision management of N fertilizer. This study demonstrated the feasibility of a simple spectral index (SI) using the first derivative of canopy reflectance spectrum at 735 nm (dR/d|735) to assess N concentration of rice (Oryza sativa L.) plants, and then validated the applicability of a simplified imaging system ...

  • Crop sensors outdo farmers at choosing nitrogen rates

    Choosing how much nitrogen (N) to put on corn fields isn’t something farmers take lightly. Many factors go into the decision, including past experiences, the timing of application, yield goals, and results from soil tests. Nevertheless, crop sensors can select N rates for corn that outperform those chosen by farmers, according to more than 50 on-farm demonstration projects conducted in ...

  • We’re farmers – of course we’re optimistic

    "People think that farmers are unwise, that we only work with our hands. But that’s not true, we work with our brains,” says German farmer Thomas Kläber. The sun is breaking through the clouds and shedding its light on the golden fields. We’re in the German region of Brandenburg that surrounds the capital Berlin, and while most people tilt their heads backwards ...


    By Yara

  • Compost Users Forum: The Applied Thoughts Of A Compost Theorist

    WITHIN a 60-mile radius of my office here in central California, there are 1,000 dairies — each having an average of 2,000 cows. They generate over four million tons of manure annually, so we are pretty much in the manure business whether we want to be or not. Somebody has to manage this material and help the farmers utilize it properly, fulfilling its potential monetary value. That’s what we ...


    By BioCycle Magazine

  • Tracking Your Data In All Your Unusual Places

    Let’s be honest: I say “level measurement,” you think “fluid in a tank.” It’s ok; most people do. And if we’re really honest with each other, you can admit that you probably were thinking about an industrial tank, related to factory production of some kind. And again, it’s ok. But there’s so much more to level measurement! One of fastest ...

  • Emissions from Crops - POST Note

    Agriculture contributes 9% of the UK’s greenhouse-gas (GHG) emissions burden and 10-12% globally. Although there is a long-term declining trend from UK agriculture, the sector may account for a larger share of overall emissions in the future as other sectors reduce emissions. This POSTnote focuses on reducing GHG emissions from growing and storing arable and horticultural crops. ...


    By UK Parliament

  • How to grow more food with less water

    Scientists and farmers collaborate on a quest for more efficient irrigation This story was co-published with Civil Eats, a daily news source for critical thought about the American food system. From reading the weather to choosing a ...


    By Ensia

  • A New Generation of GMOs

    Is synthetic biology on its way to our farms, markets and tables? Thousands of researchers will descend on Boston this fall for an event billed as the world’s largest gathering of synthetic biologists. The field is evolving so rapidly that even scientists working in it  ...


    By Ensia

  • The Safety of Genetically Modified Foods Produced through Biotechnology

    Executive Summary The Society of Toxicology (SOT) is committed to protecting and enhancing human, animal, and environmental health through the sound application of the fundamental principles of the science of toxicology. It is with this goal in mind that the SOT defines here its current consensus position on the safety of foods produced through biotechnology ...


    By Oxford University Press

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