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.

Effects of Cereal and Legume Cover Crop Residues on Weeds, Yield, and Net Return in Soybean (Glycine max)1

Abstract: A 2-yr field study was conducted during 1998 and 1999 at Stoneville, MS, on a Dundee silt loam to determine weed control, yield, and net return associated with winter cover crops in soybean. Cover crop systems included Italian ryegrass, oat, rye, wheat, hairy vetch, crimson clover, subterranean clover, no-cover crop conventional tillage (CT), and no-cover crop no-tillage (NT), all with standard preemergence (PRE), postemergence (POST), PRE + POST, and no-herbicide weed management. Oat (11.1 Mg/ha) had highest dry biomass compared to all other cover crops (6.0 to 7.6 Mg/ha) at soybean planting. Biomass decreased 9 wk after planting (WAP) compared to the respective biomass at soybean planting in all cover crops. Italian ryegrass and rye biomass decay was slow and about two-thirds of plant residue persisted at 9 WAP. Cover crops had no effect on densities of barnyardgrass, prickly sida, and yellow nutsedge, but altered the density of browntop millet. Total weed biomass was higher in rye, wheat, and subterran...

Legume Green Fallow Effect on Soil Water Content at Wheat Planting and Wheat Yield

Abstract: and yields were compared with wheat yields from conventional till other studies wheat yields following the green fallow wheat–fallow. Generally there were no significant differences in available soil water at wheat planting due to legume type. Soil water at period have been decreased due to lower soil water wheat planting was reduced by 55 mm when legumes were terminated content at wheat planting (Zentner et al., 1996; Schlegel early and by 104 mm when legumes were terminated late, compared and Havlin, 1997) or due to N deficiency (Pikul et al., with soil water in fallowed plots that were conventionally tilled. Aver- 1997). Under the higher temperature, higher evaporaage wheat yield was linearly correlated with average available soil tive demand environmental conditions of the central water at wheat planting, with the relationship varying from year to Great Plains, the positive economic trade-off between year depending on evaporative demand and precipitation in April, water used by the legumes and their favorable rotation May, and June. The cost in water use by legumes and subsequent and N fixing effects have not been observed (Vigil and decrease in wheat yield may be too great to justify use of legumes as Nielsen, 1998). The objectives of this study were (i) to fallow cover crops in wheat–fallow systems in semiarid environments. determine the effect of legume termination date (using four legume species) on available soil water content at winter wheat planting and subsequent wheat yield in a

Improving the performance of transplanted rice by seed priming

Abstract: Transplanting is the major method of rice cultivation in the world, in which seedlings are raised in nursery and then transplanted into well puddle and prepared fields. The traditional nursery sowing method is tedious and produces week seedlings that reduce the final yield due to high mortality. The potential of seed priming to improve the nursery seedlings and thus the transplanted rice was evaluated in the present study. The experiment was conducted in the rice growing area (31.45° N, 73.26° E, and 193 m) of Pakistan, during 2004–2005. Seed priming tools employed during the investigation included traditional soaking, hydropriming for 48 h, osmohardening with KCl or CaCl2 (Ψs −1.25 MPa) for 24 h (one cycle), 10 ppm ascorbate for 48 h or seed hardening for 24 h. Priming improved the initial seedling vigor and resulted in improved growth, yield and quality of transplanted fine rice while traditional soaking behaved similar to that of untreated control. Osmohardening with CaCl2 resulted in the best performance, followed by hardening, ascorbate priming and osmohardening with KCl. Osmohardening with CaCl2 produced 3.75 t ha−1 (control: 2.87 t ha−1) kernel yield, 11.40 t ha−1 (control: 10.03 t ha−1) straw yield and 24.57% (control: 22.27%) harvest index. The improved yield was attributed due to increase in the number of fertile tillers. Significant positive correlation was found between mean emergence time of nursery seedlings and kernel yield, nursery seedling dry weight and kernel yield, fertile tillers and kernel yield, and leaf area duration and kernel yield.