canopy cover Articles
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City Trees can offset Neighbourhood Heat Islands, Concordia Researcher Says
The idea of the heat island - that densely built-up urban areas are considerably hotter than the rural and semi-rural landscapes that surround them - has been extensively studied and is widely accepted by academics and the public. The idea of the heat island - that densely built-up urban areas are considerably hotter than the rural and semi-rural landscapes that surround them - has been ...
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Goosegrass and Bermudagrass competition under compaction
Goosegrass (Eleusine indica L.) is a serious weed in trafficked areas of bermudagrass (Cynodon spp.) golf and sports turf. The objective of this study was to evaluate soil compaction and canopy cover as determinants of goosegrass competition in bermudagrass turf in sand soil. Goosegrass cover, plant density, and soil penetration resistance (SPR) were measured in traffic and no-traffic plots in ...
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Forest & plant canopy analysis - Tools & methods
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 world. A general knowledge of canopy cover and the ...
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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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Canopy dynamics and human caused disturbance on a semi-arid landscape in the Rocky Mountains, USA
Invasion of grasslands by woody plants has been identified as a key indicator of changes in ecosystem structure and function in arid and semi-arid rangelands throughout the world. We investigated changes in the balance between woody and herbaceous components of a semi-arid landscape in western Colorado (USA) using historical aerial photography. Aerial photographs from 1937, 1965–67, and 1994 were ...
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Evaluation of the AquaCrop model for simulating yield response of winter wheat to water on the southern Loess Plateau of China
The objective of this study was to evaluate the performance of the FAO-AquaCrop model in winter wheat in the southern Loess Plateau of China. Multi-year field experimental data from 2004 and 2011 were used to calibrate and validate the model for simulating biomass, canopy cover (CC), soil water content, and grain yield under rainfed conditions. The model performance was evaluated using root ...
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AquaCrop model simulation under different irrigation water and nitrogen strategies
On a global scale, irrigated agriculture consumes about 72% of available freshwater resources. Deficit irrigation can be applied in the field to save irrigation water and still lead to acceptable crop production. The AquaCrop model is a simulation model for management of irrigation and nitrogen fertilizer. This model is a new model that is accurate, robust and requires fewer data inputs ...
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Parameterization and evaluation of the aquacrop model for full and deficit irrigated cotton
Predicting yield is increasingly important to optimize irrigation under limited available water for enhanced sustainability and profitable production. Food and Agriculture Organization (FAO) of the United Nations addresses this need by providing a yield response to water simulation model (AquaCrop) with limited sophistication. In this study, AquaCrop was parameterized and tested for cotton ...
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Seasonal slug pressure warning – crops at greater risk
Crops face a greater risk of slug damage and if left untreated, this can become extremely expensive for farmers, and is estimated to cost the potato industry up to £53 million per year*, as any slug damage reduces saleability and ultimately profitability of a crop. Slugs are most damaging to potatoes during the early stages of tuber bulking, which is starting to happen now. So make sure ...
By Certis UK
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Aspect and soil textural controls on snowmelt runoff on forested Boreal Plain hillslopes
Plot studies were conducted on a jack pine forest with sandy soil and aspen forests with sandy and loam soils to examine the controls of slope aspect, soil texture and fall soil moisture content on near-surface snowmelt runoff and infiltration. It was hypothesized that near-surface runoff would be greater from north-facing slopes on loam soils with increased fall soil moisture content. Fall soil ...
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Web of knowledge, web of life, web of wonder
It"s October, it"s late in the season and it"s been a bad year for mushrooms in Finland. Webcaps, a type of mushroom found particularly in the boreal and temperate forests of northern Europe, are no exception. Webcaps play an important role in these forest ecosystems. They are mycorrhizal fungi that live in symbiosis with the trees, providing nutrients and protection from diseases and receiving ...
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No persistent changes in pasture vegetation or seed bank composition after fallowing
The practice of fallowing pastures during the growing season is intended to increase plant diversity and allow natural reseeding of forage grasses. Fallowing delivers these benefits in New Zealand, but has been adopted on rotationally stocked farms in the northeastern United States with little or no quantitative assessment. Allowing the pasture to remain ungrazed may allow weedy species to ...
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Simulating yield response of quinoa to water availability with aquacrop
The modeling of yield response to water is expected to play an increasingly important role in the optimization of crop water productivity (WP) in agriculture. During 3 yr (2004–2007), field experiments were conducted to assess the crop response to water stress of quinoa (Chenopodium quinoa Willd.) in the Bolivian Altiplano (4000 masl) under different watering conditions (from rain fed, RF, to ...
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Validating the FAO aquaCrop model for irrigated and water deficient field maize
Accurate crop development models are important tools in evaluating the effects of water deficits on crop yield or productivity. The FAO AquaCrop model predicts crop productivity, water requirement, and water use efficiency (WUE) under water-limiting conditions. A set of conservative parameters [calibrated and validated for maize (Zea mays L.) in a prior study and considered applicable to a wide ...
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MobilDri Dryer: Keep Gear Dry While Planning Small Game Hunt
Intro: The fall season is upon us once again, and that can mean so many things. For me, it means time to start my annual small game hunt rituals. I’m sure everyone out there has certain things they do to prepare for the season. Some pack the night before, grab a rifle and head out the door. Mine goes a little like this… I get super giddy with excitement weeks before opening ...
By Versadri
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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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Aquacrop—the FAO crop model to simulate yield response to water
This article introduces the FAO crop model AquaCrop. It simulates attainable yields of major herbaceous crops as a function of water consumption under rainfed, supplemental, deficit, and full irrigation conditions. The growth engine of AquaCrop is water-driven, in that transpiration is calculated first and translated into biomass using a conservative, crop-specific parameter: the biomass water ...
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Spectral Reflectance Properties of Winter Cover Crops in the Southeastern Coastal Plain
Conservation tillage is a commonly adopted best management practice for reducing runoff and erosion, and increasing infiltration. Yet current methodologies in place to monitor conservation tillage adoption are largely inappropriate for regional or national assessments. A major goal of this study was to evaluate the spectral response properties of four alternative winter cover crops using remotely ...
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Data with Drew: Vegetation Indices
The cameras we use on fixed wing and drone aircraft capture visual picture images (RGB), near infrared images (NIR), and thermal images. A formula is used to analyse the NIR data returned and provides Pollen Systems with two main metrics to measure plant vigor: NDVI (Normalized Difference Vegetation Index) and NDRE (Normalized Difference Red Edge). These vegetation indices are each unique ways to ...
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Parking Lot Hail Protection
It is amazing the number of different options that have been created to try to alleviate the problems associated with massive chunks of ice falling out of the sky. Hail can cause a lot of damage and super expensive damage at that. We recognized this at WeatherSolve a number of years ago and started to work on developing a system to fix this issue. WeatherSolve already had a whole lot of ...
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