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Andrew Nelson
University of Twente
176Publications
34H-index
5,401Citations
Publications 176
Newest
#1Ambica Paliwal (Bioversity International)H-Index: 1
#2Alice G. Laborte (IRRI: International Rice Research Institute)H-Index: 15
Last.R.K. Singh (IRRI: International Rice Research Institute)H-Index: 1
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ABSTRACTSoil salinity is one of the abiotic stresses that constrains rice crop growth in the extensive coastal regions of India. Monitoring soil condition on such a large scale is time-consuming and expensive and alternative approaches have been proposed. Crop condition can be used as a reference to detect salinity-affected soils in rice crops instead of direct detection of soil condition. Vegetation indices derived from high temporal resolution satellites like the Moderate Resolution Imaging Sp...
5 CitationsSource
#1Michael MarshallH-Index: 15
#2Sophie CrommelinckH-Index: 3
Last.Andrew NelsonH-Index: 34
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Mapping the extent and location of field boundaries is critical to food security analysis but remains problematic in the Global South where such information is needed the most. The difficulty is due primarily to fragmentation in the landscape, small farm sizes, and irregular farm boundaries. Very high-resolution satellite imagery affords an opportunity to delineate such fields, but the challenge remains of determining such boundaries in a systematic and accurate way. In this paper, we compare a ...
Source
#1Adam H. Sparks (University of Southern Queensland)H-Index: 11
#2Tom HenglH-Index: 26
Last.Andrew NelsonH-Index: 34
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Provides automated downloading, parsing, cleaning, unit conversion and formatting of Global Surface Summary of the Day ('GSOD') weather data from the from the USA National Centers for Environmental Information ('NCEI'). Units are converted from from United States Customary System ('USCS') units to International System of Units ('SI'). Stations may be individually checked for number of missing days defined by the user, where stations with too many missing observations are omitted. Only stations w...
#2K. Cardwell (OSU: Oklahoma State University–Stillwater)H-Index: 1
Last.Joe TohmeH-Index: 45
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To satisfy a growing demand for food, global agricultural production must increase by 70% by 2050. However, pests and crop diseases put global food supplies at risk. Worldwide, yield losses caused by pests and diseases are estimated to average 21.5% in wheat, 30.0% in rice, 22.6% in maize, 17.2% in potato, and 21.4% in soybean (1); these crops account for half of the global human calorie intake (2). Climate change and global trade drive the distribution, host range, and impact of plant diseases ...
2 CitationsSource
#1Sonia AsiloH-Index: 2
#2Andrew NelsonH-Index: 34
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The objective of this study is to provide complete information on the dynamic relationship between X-band (3.11 cm) backscattering intensity (σ°) and rice crop’s leaf area index (LAI) at all growth phases. Though the relationship between X-band σ° and LAI has been previously explored, details on the relationship at the reproductive phase remain unstudied. LAI at the reproductive phase is important particularly at the heading stage where LAI reaches its maximum as it is closely related to grain y...
Source
#1Sugandh Chauhan (UT: University of Twente)H-Index: 1
#2Roshanak Darvishzadeh (UT: University of Twente)H-Index: 18
Last.Andrew Nelson (UT: University of Twente)H-Index: 34
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Lodging is a major yield-reducing factors in wheat, causing reductions up to 80%. Timely detection of lodging can reduce its impacts and support proper decisions regarding expected yield, crop price or its insurance. Since the incidence of lodging is heterogeneous within a field, very high-resolution remote sensing data can be viable for accurate and prompt spatio-temporal assessment of lodging severity. As such unmanned aerial vehicles (UAVs) provide a versatile and cost-effective solution to m...
1 CitationsSource
#1Stefanie SteinbachH-Index: 5
#2Konrad Hentze (University of Bonn)H-Index: 2
Last.Andrew NelsonH-Index: 34
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Wetlands are considered as biodiversity hotspots and they are commonly valued for water purification, flood retention and carbon sequestration. The need for their protection is undisputed. The urgency of the topic has become more tangible with recent studies demonstrating the rapid decline of global wetland area, where inland wetlands are being most affected. Agricultural wetland use is often described as the main driver of wetland degradation and loss through altering hydrologic characteristics...
Last.Andrew NelsonH-Index: 34
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Rice management practices which make the sustainable use of resources more efficient are important interventions towards food security. Monitoring rice crop establishment methods (transplanting or direct seeding) using remote sensing data, can provide vital information on the type of practices as well as their spread and change over time. Direct seeding is a water and labour saving practice that is being promoted across Asia, yet most existing rice crop monitoring methods assume that the rice is...
#1Mirco BoschettiH-Index: 23
Last.Lorenzo BusettoH-Index: 22
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Rice is the most important staple crop in the Philippines. Like many other rice producing countries in Asia, it is cultivated in all regions of the country. A diversity of rice varieties, management practices and environments lead to a large variation in seasonality (when rice is grown) and cropping intensity (how often rice is grown per year in the same plot of land, once, twice or even three times per year). Seasonality and intensity also change over time depending on climatic, environmental a...
#1Sugandh ChauhanH-Index: 1
#2Andrew NelsonH-Index: 34
Last.Mirco BoschettiH-Index: 23
view all 4 authors...
Lodging is one of the yield-reducing factors in wheat, causing losses of up to 80%. Lodging also has several knock-on effects such as deterioration in grain quality, slower harvest and increased drying costs. The severe effects of lodging can be minimised by detecting its incidence in time so that decisions related to expected crop yield, crop price or its insurance can be made timely. The traditional methods of lodging assessment require the on-site assessment to rate lodging state visually or ...
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