crop canopy Articles
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Optimization of crop canopy sensor placement for measuring nitrogen status in corn
Active canopy sensors can be used to assess corn (Zea mays L.) N status and direct spatially-variable in-season N application. The goal of this study was to determine optimal sensor spacing for controlling whole- and/or split-boom N application scenarios for a hypothetical 24-row applicator. Sensor readings were collected from 24 consecutive rows at eight cornfields during vegetative growth in ...
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Sprinkler irrigation changes maize canopy microclimate and crop water status, transpiration, and temperature
During a sprinkler irrigation event some water is lost due to wind drift and evaporation (WDEL). After the irrigation event, plant-intercepted water is lost due to evaporation. The water lost causes microclimatic changes which could result in positive or negative plant physiological changes. We studied the microclimatic and physiological changes on two fields grown with maize (Zea mays L.) ...
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Ground-based canopy reflectance sensing for variable-rate nitrogen corn fertilization
Nitrogen available to support corn (Zea mays L.) production can be highly variable within fields. Canopy reflectance sensing for assessing crop N health has been proposed as a technology to base side-dress variable-rate N application. Objectives of this research were to evaluate the use of active-light crop-canopy reflectance sensors for assessing corn N need, and derive the N fertilizer rate ...
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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 ...
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Maize growth and yield under daytime and nighttime solid-set sprinkler irrigation
Nighttime sprinkler irrigation usually results in lower wind drift and evaporation losses (WDELs) and better irrigation uniformity compared with daytime irrigation. However, daytime sprinkler irrigation modifies the microclimatic conditions within the crop canopy which could result in improved crop growth. We studied the effect of daytime and nighttime irrigation on the growth and yield of maize ...
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Two Approaches for Optimizing Water Productivity
Agricultural Research Service researchers in Bushland, Texas, are helping farmers make the most of their water supplies in a region where they depend on the Ogallala Aquifer, a massive underground reservoir under constant threat of overuse. Steve Evett, Susan O'Shaughnessy, and their colleagues at the Conservation and Production Research Laboratory are developing and testing soil-water and ...
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Canopy gas exchange measurements of cotton in an open system
A portable, open transparent chamber system for measuring canopy gas exchanges was developed and tested. Differentials between incoming and outgoing atmospheric H2O and CO2 concentrations were used to calculate canopy transpiration (E) and net assimilation (A) at 10-s intervals using solenoid valve actuated sample lines connected to an infrared gas analyzer. A programmable data logger controlled ...
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Increase greenhouse efficiency with boom lighting
As a leader in greenhouse automation equipment, we are always looking to bring our growers new ideas on how to best utilize our equipment within their greenhouse. With the release of our highly coveted Universal Attachment, we are able to bring you new ideas on how to do more with less. The Universal Attachment is highly effective for attaching fans, insect mats, fans and lights. Boom lighting ...
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Variable Rate Seeding with Drone Imagery
Getting a good crop canopy across the entire field is important for better crop quality and higher yield. One way of achieving this is by varying the amount of seeds. In recent years more and more farmers have started using variable-rate technology. By coupling the tractor’s GPS equipment with the seed drill, the seed amount can be varied across the field based on a predetermined plan. The ...
By Solvi AB
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Drones and scissors help decide fertilizer rate
Both Swedish and European field trials show that winter oilseed rape that has taken up a lot of nitrogen in autumn needs less nitrogen in the spring. A thinner crop, which has not assimilated so much nitrogen in the autumn, needs more N fertilizer in the spring. In order to determine the autumn’s nitrogen uptake, the so-called “cutting method” is often used in Sweden. Drones ...
By Solvi AB
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How LED and HPS Lighting affects air and leaf temperature
How LED and HPS Lighting can affect air and leaf temperature: The Effects of Convective Heat vs. Radiant Heat As growers are educating themselves more on different lighting technologies, we have been faced with questions many times over about what effects different light sources have on temperature and crop production; what is the difference between Convection Heat and Radiant Heat? Anyone ...
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A Living Map of the World`s Food Supply
Today, we’re excited to announce Indigo’s acquisition of TellusLabs, a satellite imaging and artificial intelligence company based out of Somerville, Massachusetts. This joining of their mission with ours has been over a year-and-a-half in the making, and is a product of our Indigo Research Partners’ engagement with innovative startups around the world. Here’s the story of ...
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LED or HPS for Growing Cannabis?
“What lighting source should I use for my licensed cannabis grow?”; “I am comparing LED to HPS for my cannabis operation. Which source do you recommend?” These are questions people ask me almost on a daily basis. We have covered this question in past posts on our blog, like this one by our very own head of marketing: LEDs vs Traditional Lighting but most cannabis growers ...
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Light Uniformity - Comparing LED and HPS Luminaires
Light uniformity is an important factor when it comes to growing a consistent crop and optimizing your growing environment, however, there has been some misinformation about the way HID and LED luminaires distribute light and affect plant health. As a manufacturer of both HID and LED technology, P.L. Light Systems always strives to show the complete picture of both technologies. We think both ...
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Lighting Strategies for Ornamental Crop Production
The ornamental horticultural industry is diverse and made up of flowering potted plants, cut flowers and bedding plants. Ornamentals have specific lighting requirements needed to grow high quality and consistent crops. Since many bedding plant varieties are started in winter, lighting becomes important for managing early growth stages and to ensure products are in a condition ready to be shipped ...
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Are you lighting for optimum yields?
How do you achieve the highest yields with your lighting system? As we know, increasing light intensity up to a certain species-specific point, results in a corresponding increase in yield. And when light levels are not optimized for production, or the type of crop you are growing, you are going to have slower flowering, poor root development and plant structure, as well as reduced yields. There ...
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Lighting Strategies for Vine Crop Production
Pepper, tomato and cucumber crops require consistent levels of light for year round production. There are many things to consider before investing in a lighting solution and understanding your growing environment – and the goals you want to achieve – will help in choosing a system that best suits your needs. Having a reliable and efficient lighting system is important not only for ...
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Maximize Yields with Smart Lighting Strategies: Using Metrics for a More Efficient Grow
There is a strong relationship between lighting and yield, as we know that with every 1% increase in light, there is a 1% increase in growth and yield. Measuring yield in your greenhouse is an important way to measure efficiencies and profitability, so you can better assess how your inputs affect overall yield and plant growth. In this article, we are going to overview the relationship ...
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AquaCrop—The FAO crop model to simulate yield response to water: III. Parameterization and testing for maize
The first crop chosen to parameterize and test the new FAO AquaCrop model is maize (Zea mays L.). Working mainly with data sets from 6 yr of maize field experiments at Davis, CA, plus another 4 yr of Davis maize canopy data, a set of conservative (nearly constant) parameters of AquaCrop, presumably applicable to widely different conditions and not specific to a given crop cultivar, was evaluated ...
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Forest & Plant Canopy Analysis - Tools & Methods
Canopy Analysis for Crop, Forest & Plant Research The range of applications of canopy cover analysis is truly astounding. Canopy analysis derives its usefulness from the vitality of the canopy. Many methods to measure canopy cover have been developed in the last 80 years to meet various objectives. Not surprisingly, there have been several comparisons of the tools in different parts of the ...
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