Sentences with phrase «pollination occurs»

Until recently, most biologists thought that long - distance pollination occurred only rarely, with fewer than one plant in a hundred having parents separated by more than 100 metres, says Norman Ellstrand, a plant population geneticist at the University of California at Riverside.

Not exact matches

2016 was a year of contrasts, promising a superb vintage, characterized by uniform flowering at the origin of good pollination, substantial lack of rainfall during the summer combined with abundant sunshine and evenly - occurring veraison.

The heat and ongoing abnormally dry to extreme drought conditions have occurred during the pollination period of the corn.

«We have now learned what genetic changes have occurred during the evolution of the bees, notable for their elaborate societies and essential pollination services.»

Remember that July is arguably the most important growing month for the U.S. corn crop, when the critical pollination phase of plant development occurs.

Springtime cold air outbreaks (at least two consecutive days during which the daily average surface air temperature is below 95 % of the simulated average wintertime surface air temperature) are projected to continue to occur throughout this century.19 As a result, increased productivity of some crops due to higher temperatures, longer growing seasons, and elevated CO2 concentrations could be offset by increased freeze damage.20 Heat waves during pollination of field crops such as corn and soybean also reduce yields (Figure 18.3).4 Wetter springs may reduce crop yields and profits, 21 especially if growers are forced to switch to late - planted, shorter - season varieties.