scispace - formally typeset
Search or ask a question
Topic

Sowing

About: Sowing is a research topic. Over the lifetime, 33888 publications have been published within this topic receiving 273438 citations. The topic is also known as: seeding.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the authors investigated and determined the crop coefficients and the ratio of transpiration to evapotranspiration (Tp/ETc) of winter wheat (Triticum aestivum L.) and maize (Zea Mays) based on lysimeter data for 10 years in a semi-arid region of northwest China (34°20'N, 108°24'E).

337 citations

Journal ArticleDOI
TL;DR: In this paper, the authors identify barriers to lowland moist forest regeneration in highly degraded grasslands in the Sierra Nevada de Santa Marta, Colombia, and show that these barriers include seed source, seed predation, competition with grasses, microclimate and soil limitations on plant growth, and fire.
Abstract: Extensive areas of the tropics have been converted into pasture for cattle ranching. Frequently, abandoned pasture does not revert to forest. The goal of this project was to identify barriers to lowland moist forest regeneration in highly degraded grasslands in the Sierra Nevada de Santa Marta, Colombia. The barriers we considered were seed source, seed predation, competition with grasses, microclimate and soil limitations on plant growth, and fire. Seed dispersal into the grasslands is limited to within 10 meters of forest fragments, but this barrier can be overcome by sowing seeds and planting seedlings and by establishing perches to attract dispersers. In these degraded grasslands, seed predation was lower than in the adjacent forest patches, and there was no evidence that grasses inhibited the establishment of woody species. The most important barrier was the severe degradation of the soils. In much of the area, the A and B horizons have been eroded away, leaving saprolite at the soil surface. Seedlings of two fast-growing pioneer species, Ochroma pyramidale and Cochlospermum vitifolium, grew to a maximum height of only 2.5 and 12 cm, respectively, during the first eight months. The slow plant growth in the degraded grassland soils compared to forest soils was associated with lower levels of cation-exchange capacity, calcium, magnesium, and potassium. Even if these barriers could be overcome, the frequent and extensive use of fire in the region must be controlled to avoid killing established woody plants.

337 citations

Journal ArticleDOI
01 Dec 2000-Ecology
TL;DR: It was concluded that, though the behavior of individual species may differ, the local deficiency of seeds may be an important force generating small-scale community patterns of calcareous grasslands.
Abstract: To evaluate the relative roles of seed availability and competitive interactions in creating within-community patterns of species richness in unproductive grassland, we conducted a sowing experiment in a dry calcareous (alvar) grassland, where both the number of arriving seeds and the number of arriving species were approximately doubled compared to the natural seed rain. Also, in half of the plots, 36% of the vegetation and bryophyte cover was removed to simulate disturbance. Sowing significantly increased species richness and the number of seedlings in plots. Disturbance increased the number of seedlings but had no significant effect on species richness. In the first year, the highest number of seedlings was found in disturbed and sown plots. The dynamics of seedling numbers differed among species. Of the 15 sown species, seedlings of nine species were found in some plots. The number of seedlings of two species were not dependent on treatments, those of three species depended only on sowing, and for four species there was a significant positive interaction between sowing and disturbance. The establishment of sown species was not dependent on initial species richness or number of adult ramets in experimental plots. It was concluded that, though the behavior of individual species may differ, the local deficiency of seeds may be an important force generating small-scale community patterns of calcareous grasslands.

333 citations

Book ChapterDOI
01 Jan 2000

323 citations

Journal ArticleDOI
01 Nov 1973-Nature
TL;DR: The time from sowing to seedling emergence and the time between the emergence of the first and the last seedling are shortened and tomato seeds thus treated for 6 d exhibit a much higher level of RNA production during germination than untreated seeds8.
Abstract: CROP seeds sown in cold soil are notoriously slow to emerge and it would obviously be desirable to shorten the time from sowing to seedling emergence and the time between the emergence of the first and the last seedling. This has occasionally been achieved by the pre-sowing seed treatment sometimes referred to as ‘hardening’1–3 or ‘advancing’4 involving repeated cycles of imbibition of a carefully controlled quantity of water, followed by drying back the seeds before the radicles emerge but results have not been consistent. There have been some successful attempts to replace this method by imbibition of seeds in salt solutions5–7; tomato seeds thus treated for 6 d exhibit a much higher level of RNA production during germination than untreated seeds8.

318 citations


Network Information
Related Topics (5)
Soil fertility
33.7K papers, 859.4K citations
92% related
Shoot
32.1K papers, 693.3K citations
90% related
Germination
51.9K papers, 877.9K citations
90% related
Soil pH
23.9K papers, 624.4K citations
87% related
Agriculture
80.8K papers, 1.3M citations
87% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
20232,551
20225,773
2021919
20201,657
20192,181