Willa Cather's 1913 novel, O Pioneers! concludes with an unexpected moment of extreme violence as two young lovers, Emil Bergson and Marie Shabata, are murdered by Marie's husband in a mulberry orchard. Cather's novel is almost wholly devoted to the psychological interior of the protagonist, Alexandra Bergson, thereby rendering this violent interruption more dynamic as it essentially undercuts ...

We associate to certain symmetric or antisymmetric functions on the set ( E d+1 ) of (d+ 1)−subsets in a finite set E an equivalence relation on E and study some of its properties. 1 Definitions and main results We consider a finite set E and denote by (E d ) the set of subsets containing exactly d elements of E. In the sequel we move often freely from sets to sequences: we identify a subset {x...

We investigated Fraxinus excelsior breeding system using field data collected in a natural population and in a seed orchard. First, we attested functional trioecy (co-occurrence of males, hermaphrodites and females), with males producing pollen, hermaphrodites producing both pollen and seeds simultaneously, and females producing seeds. Second, we found that the reproductive system of F. excelsi...

The use of robots is increasing in agriculture, but there a lack suitable robotic technology for weed management orchards. A lawnmower (RLM) was installed, and its performance studied between 2017 2019 pear orchard (1318 m2) at Ibaraki University, Ami. We found that the RLM could control weeds an throughout year minimum height (average height, WH: 44 ± 15 mm, standard deviation (SD) dry biomass...

Tree structure probing is a significant basic part of target precision spraying. Orchard tree structure digital test system, which consists of three components, is designed by using the ultrasonic sensors. The conveying platform is for fixing and precisely moving the sensor which is used for probing the tree profile. The lower computer can process the test data and communicate with upper comput...

15. Dillon JC, Weyman AE, Feigenbaum H, Eggleton RC, Johnston K: Cross-sectional echocardiographic examination of the interatrial septum. Circulation 55: 115, 1977 16. Lieppe W, Scallion R, Behar VS, Kisslo JA: Two-dimensional echocardiographic findings in atrial septal defect. Circulation 56: 447, 1977 17. Hagler DJ, Tajik AJ, Seward JB, Mair DD, Ritter DG: Realtime wide-angle sector echocardi...

Agricultural intensification, or the increase in crop production per unit of input land area to meet needs a growing population, has resulted landscape dominated by large scale monoculture cropping. Pollinators, specifically, are impacted lack diverse floral and habitat resources associated with this type farming. Agriculture must develop practices that diversify availability flowering support ...

A study was undertaken to determine if meadow voles, Microtus pennsylvanicus, use habitats adjacent to apple orchards. Considerations were given to how extensively these areas were used, if at all, and if a bulldozed strip would control their movements between the orchard and adjacent border habitats. Trapping and telemetry data showed that meadow voles do use the adjacent border habitats exten...