Because of their central positions, the electrodes are closer to the expected sources of current and thus in the region of maximum potential gradient. Hence, this electrode configuration maximizes the changes in both magnitude and sign of the measured ΔV associated with a change in the CSD distribution. The electrode diameter was 1.5 mm. The penetration …
Author Archives: nature2022
We are unaware of any published measurements of CH4 concentrations in xylem sap
There are numerous reports of upland forests and savannas that switched for periods of time to CH4 sources , and wet-land forests that switched to CH4 sinks . In most cases the proximate cause for the shift was a change in soil water content, but the ultimate cause varied from seasonal shifts in precipitation and …
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We present and discuss studies supporting this hypothesis
These insecticides have outstanding efficacy in crop protection against a number of pest invertebrates , especially piercing–sucking insect herbivores . However, neonicotinoids have limited efficacy against lepidopteran and coleopteran pests . Advantages associated with systemic insecticides over nonsystemic insecticides include: 1) reduced sensitivity to spray coverage and canopy penetration , as the active ingredient translocates …
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Workers who avoid FLCs experience higher earnings in agriculture or in the non-farm labor market
The 75th percentile varied widely by commodity: $6,172 for those primarily employed by FLCs, $10,572 for those in grapes and $29,465 for those in mushrooms.The number of individuals and jobs reported by agricultural employers increased in the 1990s, reflecting increased production of labor-intensive fruit and vegetable crops and, the data suggests, more farm workers each worked …
The simulated NO3-N uptake accounted only for 25.5% of applied nitrogen
The cumulative crop evapotranspiration during the 29 day experimental period was equal to 65.3 mm, and daily ETC varied from 1.68 to 3.39 mm. Irrigation was initiated on 16 August 2010 and terminated on 13 September, 2010. Irrigation and rainfall were recorded daily and drainage volume was measured 3 times per week throughout the trial period. …
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We also assume that females hold no wealth and are identical in their reproductive potential
Our age adjustment delivers a measure that could be called ‘completed polygyny’ by analogy to ‘completed fertility’. The populations exhibiting surprisingly high levels of polygyny by our definition—e.g. the Ache´, Hadza, Maya, English and Krummho¨rn populations—reflect the prevalence of serial monogamy, not polygyny in the usual sense of multiple concurrent wives. Although most anthropological analyses …
Agricultural robots will typically execute computed motions for a very large number of times
Dynamic, on-line route planning has recently received attention in the agricultural robotics literature for large-scale harvesting operations because of its economic importance and the availability of auto-guided harvesters and unloading trucks. Reported approaches compute a nominal routing plan for the harvesters assuming some initial yield map, and then they route the support units based on the …
Two non-suckering clonal root stocks that impart vigor to scions were released
In addition, hazelnut trees on C. colurna root stocks are frequently more variable in size and yield than self-rooted trees of C. avellana. In a trial using ‘Barcelona’ as a scion cultivar, the graft unions were overgrown and nut yields declined with age, at ~20–25 years. Due to these disadvantages, the Faculty of Agriculture, at …
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The biological reality of ripening is that its natural end is senescence
Temperature, humidity, ethylene levels, and the storage oxygen-to-carbon dioxide ratio must be controlled to slow down maturation and senescence in order to maintain produce shelf-life and quality. Low temperatures are used to reduce respiration, thereby extending shelf-life, but also have the added benefit of suppressing water loss, shrinkage, and fungal growth, which can occur due to …
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This follows the practice described for nearly all peoples who grew tobacco in the Far West
Plants have flowered and seeded here for at least the past thirty years, serving as a ready seed source for downstream dissemination.In 2004, an event occurred which ultimately helps clarify the relationship between regional riverine and roadside-growing plants and the surrounding flora by providing a biogeographical context for the meager ethnographic information regarding tobacco use …