The blade of the cultivator passes through the soil at 2 to 6 inches deep, which may explain why greater soil compaction was measured there. Cultivations often also occurred when the soil was still moist following an irrigation, which may have contributed to the development of compacted layers over time.Moisture. Average, volumetric soil moisture levels at the…
All posts in mobile vertical rack
Flower production and seed output are influenced by the development of the inflorescence
A study of Arabidopsis found a 50% reduction in seed set when pollen was irradiated at 400 Gy and less than 10% seed set with pollen irradiated at 800 Gy . The effects of different irradiation doses on seed set varied depending on the sequence of pollination treatments applied . The seed set from pollination…
Colored plastic mulches have also been used in many parts of the United States to enhance yields
Excellent sources of information on specific characteristics and applications of plastic mulches are available on the World Wide Web, and several of these are provided in the references to this publication. Most plastic mulch materials are made of either high- or low-density polyethylene, ranging from 0.30 to 0.79 inches in thickness, are 5 to 6 feet wide,…
Verticillium wilt reduces plant vigor and yield and can eventually kill infected plants
Seed companies frequently treat seeds with an insecticide and several fungicides to control seedling pests and diseases to ensure good stand establishment. A mixture of seed treatments includes the insecticide Cruiser 5FS and the fungicides Dynasty , Bion , or Plenaris for downy mildew, Maxim for Fusarium, and Apron XL for Rhizoctonia, Pythium and Phytophthora.The pustules turn black with…
We used the plateau record to determine the estimate of K as described in Duchesne and Turgeon
Separate models were additionally used for each of the Neochetina spp. Stepwise model simplification was performed using likelihood ratio tests. Differences across collection sites were compared, based on 95% CI, using Tukey’s posthoc test in the “multcomp” package . To determine whether the number of individuals released affects genetic diversity, we examined the number of weevils imported…
Evolution of weeds from crop domesticated lines requires changes at several important traits
Traits in California weedy rice plants that mimic both medium-grain and gourmet specialty cultivars include erect leaf angles, cleft ligule shape, culm strength , green node color, panicle exertion , and ligule pubescence .Crop traits in weedy rice specific to co-occurring medium-grain cultivars include basal leaf sheath color and hull color . Crop traits grouping weedy rice with gourmet…
We chose tomato due to its high economic importance and high susceptibility to parasitic weeds
To determine host resistance to plant parasite P. aegyptiaca, we used a pot system containing soil infested with P. aegyptiaca seeds. In the current study, concomitant with the decrease of SL content, there were significant decreases in the number of parasite tubercles and shoots growing on tomato lines 1, 2, 5 and 11 relative to the control treatment…
Evolution of weeds from crop domesticated lines requires changes at several important traits
Moreover, while California weedy rice shares some similarity to weedy rice from the southern US at several loci as expected with a similar genetic background, divergence at few specific loci highlights changes required for California weedy rice to thrive in this novel agricultural system. If weedy rice in California is newly derived from a temperate japonica crop ancestor in…
The consistency of the maps and the actual landscape was markedly high
Individual digitized CIR images provided clues about weed patch distribution that could be used by land managers in preliminary assessments to identify suspect areas to investigate on the ground. In March CIR images, for example, vegetation patches associated with forage dominated ground truth points generally appeared greener than those associated with weed-dominated points . In May CIR imagery, the…
The negative pressure technique used 50% less fuel than traditional sheet steaming
Raffaelli et al., used a steaming machine that uses a negative pressure steam technique that involves applying steam to the top 10 cm of the soil underneath a tarp into the soil. A fan is also used creating suction through polypropene tubes buried in the soil . The negative pressure technique does a better job in…