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... Soil arsenic (As) levels are particularly high in parts of China, where wheat and rape are widely grown. Understanding the effects of As concentration on the growth of these two major crops is of significance for food production and security in China. A pot experiment was carried out to study the uptake of As and phosphorus (P), and the soil As bioavailability at different growth stages of wheat a ...
Ebony G. Murrell; Meagan E. Schipanski; Denise M. Finney; Mitchell C. Hunter; Mac Burgess; James C. LaChance; Barbara Baraibar; Charles M. White; David A. Mortensen; Jason P. Kaye
... Cover crop mixtures retain higher diversity when allowed sufficient growth in fall. Cereal rye dominates mixtures in spring, particularly when fall planting is delayed. Grasses overperform in cover crop mixtures compared to their growth in monoculture. Brassicas underperform in cover crop mixtures compared to their growth in monoculture. Legumes’ growth in cover crop mixtures varies depending on s ...
Brassica napus; Triticum aestivum; air temperature; canola; climate; crop models; crop yield; data collection; prairies; soil science; solar radiation; spring wheat; statistics; Canada
Abstract:
... Estimating daily solar radiation from common meteorological variables plays an important role in agricultural applications, such as driving crop growth models. Relatively simple and accurate estimation methods, which use only daily air temperature together with precipitation, are often required. Based on all available solar radiation data across Canada, the most common and representative solar rad ...
Russ W. Gesch; D. S. Long; D. Palmquist; B. L. Allen; D. W. Archer; J. Brown; J. B. Davis; J. L. Hatfield; J. D. Jabro; J. R. Kiniry; M. F. Vigil; E. A. Oblath; T. A. Isbell
... Brassicaceae oilseed crops can provide rotation benefits to dryland wheat (Triticum aestivum L.) and supply feedstock for biofuel production. However, growers face decisions about what oilseed crop is best suited for an environment. The objective of this study was to determine how varying production environments affect the agronomic performance of modern cultivars of six Brassicaceae crop species ...
... Cover crops can provide a variety of benefits to an agricultural system: weed suppression, soil quality improvement, and soil water infiltration. Although there is ample research documenting weed suppression from cover crops, the mechanics of the suppression are not implicitly understood. Along with the aforementioned positive attributes, negative allelopathic effects on row crops planted into cov ...
... Allelopathic effects of different plant allelochemicals have become the focus of studies that aim to determine new pesticidal compounds. Plant extracts with different chemical compositions can be obtained using different methods of extraction, whereas studies dealing with allelopathic properties use biotests to obtain fast and precise results. Such studies were undertaken after noticing the allelo ...
... In Mediterranean semiarid areas, barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.) are major crops because they are well adapted to limited-water environments. In this study we tested the performance of alternative rotations to the typical barley and wheat monocultures in a rainfed Mediterranean semiarid area of northeastern Spain under a no-tillage (NT) system. Four rotations were esta ...
water conservation; diameter; soil water content; Sorghum bicolor; bulk density; crop yield; forage; Triticum aestivum; soil fertility; Brassica napus; triticale; Hibiscus cannabinus; protein content; crop rotation; mortality; soil aggregates; Texas
Abstract:
... Dryland winter wheat (Triticum aestivum L.) and grain sorghum [Sorghum bicolor (L.) Moench] yield favorably when rotated or grown continually in the southern Great Plains, but improved water conservation practices make other systems possible for these crops. Also, farmers can now produce other crops without losing government payments. Winter wheat, grain sorghum, and opportunity crop performance; ...
... Ammoniacal fertilizers can cause seedling damage. The present aims were to characterize spatial and temporal, root morphological NH₃/NH₄⁺ toxicity symptoms, assess the extent of the toxicity zone, and relate species-specific responses to their root architecture. Wheat (Triticum aestivum L.) and canola (Brassica napus L.) were exposed to seed and deep placed urea. Faba (Vicia faba L) seedlings were ...
... Seed aging has become a topic of renewed interest but its mechanism remains poorly understood. Our recent analysis of stored mRNA degradation in aged Arabidopsis seeds found that the stored mRNA degradation rates (estimated as the frequency of breakdown per nucleotide per day or β value) were constant over aging time under stable conditions. However, little is known about the generality of this fi ...
Anthocoridae; Aphidoidea; Brassica napus; Chrysopidae; Coccinella septempunctata; Harmonia axyridis; Pisum sativum; Triticum aestivum; Urtica dioica; demonstration farms; edge effects; field crops; field experimentation; host plants; integrated pest management; peas; wheat
Abstract:
... The common nettle (Urtica dioica L.) is a perennial and cosmopolitan plant species and is known to be the source of food for a great diversity of insects. To understand the importance of the nettle in agro-ecosystems, a field experiment was carried out in an experimental farm at Gembloux (Belgium) to study the effect of nettle margin strips on aphid and aphidophagous populations in close field cro ...
... In central Oklahoma, winter canola (Brassica napus L.) has recently become the primary rotational winter crop with wheat (Triticum aestivum L.). Annual aphid pest outbreaks in canola have resulted in widespread application of insecticide. Insect parasitoids, which frequently suppress aphids in nearby wheat, may move to canola because of large numbers of aphids. These parasitoids probably will be e ...
... Several investigators have questioned the use of the ¹⁵N natural-abundance method of estimating N₂ fixation because of variability in soil δ¹⁵N and small differences between the δ¹⁵N of soil N and atmospheric N. Investigations were conducted to compare the ¹⁵N natural-abundance and ¹⁵N-isotope-dilution methods for estimating N₂ fixation of field-grown pea (Pisum sativum L.) and lentil (Lens culina ...
... Optimal development of root architecture is vital to the structure and nutrient absorption capabilities of any plant. We recently demonstrated that AtCLE26 regulates A. thaliana root architecture development, possibly by altering auxin distribution to the root apical meristem via inhibition of protophloem development. In addition, we showed that AtCLE26 application is able to induce a root archite ...
Brassica napus; Lolium perenne; Sinapis; Triticum aestivum; animal manures; arylsulfatase; composts; enzyme activity; field experimentation; mineral fertilizers; rhizosphere; roots; soil
Abstract:
... It is assumed that arylsulfatase contributes to the mineralization of organic S to SO42− for plant uptake. However, the impacts of agronomic measures (long-term organic manure) or crop species on enzyme activity are not well understood. Therefore, in the present investigations arylsulfatase activity was quantified within the rhizosphere of Sinapis album, Lolium perenne, Triticum aestivum and Brass ...
Brassica napus; Digitaria eriantha; Triticum aestivum; arid lands; case studies; crops; desertification; environmental assessment; environmental impact; grasses; inventories; land use; life cycle impact assessment; life cycle inventory; models; rapeseed; soil; winter wheat; Argentina; Spain
Abstract:
... PURPOSE: Land use in dry lands can result in a final stage where land is completely depleted or entirely degraded causing the desertification phenomenon. The first part (part 1) of this series of two articles proposed a methodology to include desertification in life cycle assessment (LCA). A set of variables to be measured in the life cycle inventory, characterization factors, and an impact assess ...