BACKGROUND AND AIMS Accurate quantifications of plant responses to photoperiod are useful for physiological studies, in growth modelling and in other studies of environmental effects. The objective of the current work was a mathematical description of photoperiodic influence on plant morphological traits, using functions with few and common parameters related to key plant characteristics and ty...

Timothy is a perennial forage grass grown commonly in Boreal regions. This study explored the effect of vernalization and photoperiod (PP) on flowering and growth characteristics and how this related to changes in expression of three flowering related genes in accessions from different geographic origin. Large variation was found in accessions in their vernalization and PP responses. In souther...

BACKGROUND Climate change directly affects species by altering their physical environment and indirectly affects species by altering interspecific interactions such as predation and competition. Recent studies have shown that the indirect effects of climate change may amplify or counteract the direct effects. However, little is known about the the relative strength of direct and indirect effect...

Tillage is the most energy-intensive soil operation. In actual energy situation important to explore and analyze physical laws of cultivation processes, that demand large quantities, at border technical- agricultural sciences. We studied phenomenon’s occurring during work with a rotary tiller approximated requirements computer simulation using Matlab Simulink environment. The model used was sim...

We report the twining handedness of Codonopsis pilosula, which has either a 9 leftor right-handed helix among different plants, among different tillers within a 10 single plant, and among different branches within a single tiller. The handedness was 11 randomly distributed among different plants, among the tillers within the same plants, 12 but not among the branches within the same tillers. Mo...

A delay in the mechanical transplantation (MT) of rice seedlings frequently occurs in Huanghuai wheat-rice rotation cropping districts of China, due to the late harvest of wheat, the poor weather conditions and the insufficiency of transplanters, missing the optimum transplanting time and causing seedlings to age. To identify how delaying transplanting rice affects the agronomic characteristics...