Abstract Key message Paternity analyses show that effective pollination of ash ( Fraxinus excelsior L.) in a seed orchard and floodplain forest affected by dieback is more likely to be facilitated healthier males. Thereby, natural selection can have positive effect on the health future generations. Context Ongoing increasing fragmentation populations may result reduced pollen flow, which reduce...

D-xylose is one of the most abundant pentose sugars in nature. To isolate oleaginous yeasts that can utilize xylose from diverse soil samples, soils from a litchi orchard, longan orchard, carambola orchard, and woods were collected, yeasts were isolated by the glycerol enrichment and their xylose-assimilating capacities were measured. A subset of these isolates was grown in nitrogen-limited med...

A novel approach for orchard scanning is proposed that is validated through automatic separation of trees and height measurements. The experiments were done in a real orchard recording data from a moving vehicle, using Lidar and stereo vision. The orchard reconstruction was done using tilt sensor corrected GPS positions interpolated through encoder counts. The accuracy of the reconstruction and...

Several tests were performed on commercially used orchard sprayers with different types of air discharge systems (conventional, cross flow, directional spouts). The measurements were conducted in a hangar on an apple orchard planted in containers. Pure tab water and water with minerals (Mg, Mn, Zn) were sprayed. Water sensitive paper and blotting paper were put in and around the trees to evalua...

Effect of the fungicide tetraconazole on microbial community in silt loam soils from orchard with long history of triazole application and from grassland with no known history of fungicide usage was investigated. Triazole tetraconazole that had never been used on these soils before was applied at the field rate and at tenfold the FR. Response of microbial communities to tetraconazole was invest...

Moth species trapped using the sex pheromone of Stenoma catenifer (LaSalle) as a lure, were registered at 2 commercial avocado orchards (one consisting of “Hass” and other of “Criollo”) and in wild “Criollo” avocado trees in southern Mexico. Traps were maintained for 1 mo in two seasons (dry and wet) on avocado trees under these 3 production conditions, changing the baits each season. Weekly ob...

Consider in R2 the standard lattice L = Z×Z and the origin (0,0). A point (m,n) ∈ L−{(0,0)} is said to be visible if the segment connecting the origin and (m,n) does not contain any other lattice points. Visibility problems have been studied since a century. Perhaps the most celebrated problems are the visible version of Gauss circle problem and the so-called orchard problem (see other problems...

The effects of supplemental mass pollination (SMP) were studied in two Pinus sylvestris seed orchards differing in pollen production. Pollen was dusted over the whole tree during the period of peak female receptivity using a pressurized backpack sprayer. The success of SMP was assessed by means of allozyme markers. In the orchard with high pollen production, detectable differences in SMP succes...

Input requirements in an orchard vary in space and time due to the variability of climate, soil and plant growth. Measurements were carried out in Prunus domestica (plum) orchard in the Werder fruit production area in Brandenburg, Germany. Soil zones in the orchard were identified by means of electrical conductivity. Plant data were captured on the tree and organ level: laser-scanner hits show ...

Abstract Genomic selection (GS) is currently being used in the New Zealand radiata pine ( Pinus D. Don) breeding program to accelerate genetic gain. GS also has potential deployment of gain production forest through early selection. The increased rate cycle will need be transferred more quickly realise that population. selections have lower accuracies than based on phenotypic data as practised;...