It is usually expressed as kilograms or tonnes per hectare per year, assuming conventional plant densities of 1, 100-1, 400 trees per hectare.
12.
At this leading edge, plant density is low, and it is not likely that pollen blown from one plant will land on another.
13.
It is an abundant seed producer, with a potential in excess of 300 seeds per plant; seed production per plant is dependent on plant density.
14.
Largely due to the loss and degradation of the tallgrass prairie landscape, violet plant density tends to be limited or far reduced in certain areas.
15.
Plant density and population structure differed significantly between overgrazed and grass-dominated areas, suggesting that the differences may be due to competition for scarce water and nutrients.
16.
Deleterious effects of soybean aphids on soybean can be highly variable and are influenced by factors like soybean aphid density, plant stage, plant density, and temperature.
17.
The maximum foraging distance for " O . rufa " is about 600 m, though generally high plant density around the nests allow bees to forage closer to the nest and for a shorter duration.
18.
Forages are grown in this manner, since animal traffic is expected and maximum plant density is required for their nutrition, as are cover crops, since their purpose of competing with weeds and preventing soil erosion depends largely on density.
19.
Disease control is achieved by use of plants that have been bred for good resistance to many diseases, and by plant cultivation approaches such as crop rotation, pathogen-free seed, appropriate planting date and plant density, control of field moisture and pesticide use.
20.
Many species that have adapted to grow on serpentine soils are not adapted to compete with other plants and do not survive well under competition in other soils that tend to have denser plant numbers; in serpentine soils plant densities are lower resulting in less direct competition for resources like light and water.
