Spatial assessment of the correlation of seeding depth with emergence and yield of corn

Knappenberger, Thorsten; Köller, Karlheinz

doi:10.1007/s11119-011-9235-4

Cited by 17 publications

(8 citation statements)

References 44 publications

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“…Also, electrical sensor systems, e.g. for soil electrical resistivity or electromagnetic induction, are used to explain soil heterogeneity in fields (Corwin and Lesch, 2003;Knappenberger and Köller, 2011). Other sensor principles, e.g.…”

Section: Methods Of Sensingmentioning

confidence: 99%

Mobile sensor platforms: categorisation and research applications in precision farming

Zecha

Link

Claupein

2013

J. Sens. Sens. Syst.

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Abstract. The usage of mobile sensor platforms arose in research a few decades ago. Since the beginning of satellite sensing, measurement principles and analysing methods have become widely implemented for aerial and ground vehicles. Mainly in Europe, the United States and Australia, sensor platforms in precision farming are used for surveying, monitoring and scouting tasks. This review gives an overview of available sensor platforms used in recent agricultural and related research projects. A general categorisation tree for platforms is outlined in this work. Working in manual, automatic or autonomous ways, these ground platforms and unmanned aircraft systems (UAS) with an agricultural scope are presented with their sensor equipment and the possible architectural models. Thanks to advances in highly powerful electronics, smaller devices mounted on platforms have become economically feasible for many applications. Designed to work automatically or autonomously, they will be able to interact in intelligent swarms. Sensor platforms can fulfil the need for developing, testing and optimising new applications in precision farming like weed control or pest management. Furthermore, commercial suppliers of platform hardware used in sensing tasks are listed.

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Section: Methods Of Sensingmentioning

confidence: 99%

Mobile sensor platforms: categorisation and research applications in precision farming

Zecha

Link

Claupein

2013

J. Sens. Sens. Syst.

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“…Although there is no consensus on the minimum temperature required for maize growth, Birch et al. () concluded 8 °C, while Knappenberger and Knoller () and Bonhomme () maintain 10 °C. The latter explains that intraspecies variation appearing to contradict this can be attributed to photoperiod sensitivity, so that long‐day genotypes are slowed in development during coincidentally lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Cause and Consequence in Maize Planting Dates in Germany

Parker

Shonkwiler

Aurbacher

2016

J Agronomy Crop Science

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An important part of agricultural adaptation is the timing of crop sowing dates, affecting yields and the level of risk incurred during a particular season. Cold stress is especially relevant in maize, Zea mays L., so that the timing of planting in the spring is a tactical response to short‐term weather, but is also subject to strategic planning with regard to longer‐term climate. Both factors compare the potential implications of cold stress to the additional yield obtainable through earlier planting. New cultivars suited to growing conditions in Europe and generally increasing spring temperatures have enabled earlier planting, but it is still dependent on short‐term weather during the planting period. In the context of field‐level decision‐making, a panel regression is used to estimate the relationship between weekly local temperature and precipitation and planting dates at specific sites throughout Germany. Next, localised weather data and planting behaviour are linked to yields at the district (Landkreis) level to show the effects of planting date on yield. Based on these relationships optimal planting dates are explored with some associated costs and benefits. Results show a trend towards earlier planting that follows observed increasing spring temperatures and the availability of more cold‐tolerant cultivars but this advance is buffered by the increasing severity of minimum temperatures during a critical period. Earlier planting potentially increases yield but this is offset by additional management costs and risk. A robust and simple depiction of farmer behaviour in climatic, technological and economic context can help to understand trends in crop management and productivity that effect agricultural landscapes.

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“…Thus, shallow tillage practices may not be the key agronomic practices to reduce volunteer corn emergence as the seeds incorporated in the soil may emerge even from 15 cm soil depth. In contrast, Knappenberger and Koeller (2012) reported higher corn seedling emergence at the seeding depth of 8-9 cm compared with shallow seeding (4-7 cm deep).…”

Section: Effect Of Seed Burial Depthmentioning

confidence: 75%

Factors affecting germination and emergence of glyphosate-resistant hybrid corn (Zea maysL.) and its progeny

Chahal

Jhala

2016

Can. J. Plant Sci.

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Laboratory and greenhouse experiments were conducted to compare the effects of agronomic and environmental factors on germination and emergence of glyphosate-resistant (GR) hybrid corn (Mycogen 2G681) and its progeny. The germination of GR hybrid corn and its progeny was 84% to 97% at day/night temperatures of 15/10°C to 42.5/30°C, while higher (45/35°C) and lower (0/0°C) temperatures reduced germination to ≤6%. Germination was >90% at all alternating as well as constant light and dark periods at a fixed day/night temperature of 30/20°C. At osmotic stress level of 0 to −0.3 MPa, >90% of hybrid corn and progeny seeds germinated, while osmotic stress level of −0.4 to −1.3 MPa reduced germination to <65%. Greater than 90% germination was observed at a wide range of salt concentrations (0-160 mM), with the lowest germination (53%) at 320 mM. More than 87% cumulative seedling emergence of hybrid corn and its progeny occurred at a depth of 0.5-6 cm and hybrid corn emergence reduced from 86% to 23% compared with 21% to 2% reduction of progeny at 1 and 2 d of flooding, respectively.Key words: flooding duration, light, osmotic stress, seed burial depth, temperature.Résumé : Les auteurs ont effectué des expériences en laboratoire et en serre afin de comparer les effets de divers paramètres agronomiques et environnementaux sur la germination et la levée d'un maïs hybride résistant au glyphosate (RG) (Mycogen 2G681) et de sa progéniture. Le maïs hybride RG et sa progéniture ont enregistré un taux de germination de 84 % à 97 % aux températures diurnes/nocturnes de 15/10°C à 42,5/30°C, des températures plus élevées (45/35°C) ou plus basses (0/0°C) faisant chuter le taux de germination à ≤ 6 %. Le taux de germination dépassait 90 % pour toutes les périodes alternant la lumière et l'obscurité à un rythme constant, à une température diurne/nocturne fixe de 30/20°C. À un stress osmotique de 0 à −0,3 MPa, plus de 90 % des graines du maïs hybride et de sa progéniture ont germé, mais un stress osmotique de −0,4 à −1,3 MPa porte la germination en-dessous de 65 %. Les auteurs ont observé un taux de germination supérieur à 90 % à une vaste gamme de concentrations de sel (de 0 à 160 mM), le taux de germination le plus faible (53 %) ayant été enregistré à 320 mM. Cumulativement, plus de 87 % des plantules du maïs hybride et de sa progéniture ont levé à une profondeur de 0,5 à 6 cm. La levée du maïs hybride est passée de 86 à 23 % après une et deux journées d'inondation, respectivement, contre 21 à 2 % pour la progéniture. [Traduit par la Rédaction] Mots-clés : durée de l'inondation, lumière, stress osmotique, profondeur du semis, température.

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Spatial assessment of the correlation of seeding depth with emergence and yield of corn

Cited by 17 publications

References 44 publications

Mobile sensor platforms: categorisation and research applications in precision farming

Mobile sensor platforms: categorisation and research applications in precision farming

Cause and Consequence in Maize Planting Dates in Germany

Factors affecting germination and emergence of glyphosate-resistant hybrid corn (Zea maysL.) and its progeny

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