emergence of seedlings

См. также в других словарях:

• weed — weed1 weedless, adj. weedlike, adj. /weed/, n. 1. a valueless plant growing wild, esp. one that grows on cultivated ground to the exclusion or injury of the desired crop. 2. any undesirable or troublesome plant, esp. one that grows profusely… …   Universalium

• Weed — /weed/, n. Thurlow /therr loh/, 1797 1882, U.S. journalist and politician. * * * Any plant growing where it is not wanted. On land under cultivation, weeds compete with crops for water, light, and nutrients. On rangelands and in pastures, weeds… …   Universalium

• preemergence — |prē+ adjective Etymology: pre + emergence : used or occurring before emergence of seedlings aboveground dramatic success has been achieved with preemergence herbicides Chem. & Engineering News no preemergence injury occurred in the field… …   Useful english dictionary

• Caulophyllum — Taxobox name = Caulophyllum thalictroides image width = 240px image caption = Caulophyllum thalictroides from Britton Brown 1913 regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Ranunculales familia = Berberidaceae genus =… …   Wikipedia

• Soil structure — is determined by how individual soil granules clump or bind together and aggregate, and therefore, the arrangement of soil pores between them. Soil structure has a major influence on water and air movement, biological activity, root growth and… …   Wikipedia

• preemergence — adjective Date: 1935 used or occurring before emergence of seedlings above the ground < preemergence herbicides > …   New Collegiate Dictionary

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• forestry — /fawr euh stree, for /, n. 1. the science of planting and taking care of trees and forests. 2. the process of establishing and managing forests; forestation. 3. forestland. [1685 95; < MF foresterie. See FOREST, RY] * * * Management of forested… …   Universalium

• Seed — A seed Audio IPA|en us seed.ogg|/ˈsiːd/ (in some plants, referred to as a kernel) is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and… …   Wikipedia

• damping-off — /dam ping awf , of /, n. Plant Pathol. a disease of seedlings, occurring either before or immediately after emerging from the soil, characterized by rotting of the stem at soil level and eventual collapse of the plant, caused by any of several… …   Universalium

• Senecio vulgaris — Common groundsel Scientific classification Kingdom: Plantae …   Wikipedia