The small grain crop amendments used in these tests were air-dried and milled straw residues of mature wheat , barley , oats and triticale plants which were collected from recently harvested fields in the Fresno, California area. All amendments were uniformly incorporated into soil at a concentration of 1.9% , the approximate quantity of stubble […]
Tag: cannabis cultivation
This policy is important as it suggests that behavior will strongly respond to financial signals
As of December 2020, U.S. consumers can choose from more than 50 light-duty EV models that span multiple vehicle classes, markets, and a wide MSRP price range from $27,500 to more than $100,000. Projections for continued EV growth through the present “second decade” of mass deployment are varied, but many suggest a sustained exponential growth […]
Groupings were compared both within and among sites with anosim in the same package
Cover crop mixtures were designed to fulfill different ecological goals, and we evaluated their impact on weed population density and species communities across a wide geographical area in central California. We hypothesize that both functionally uniform and diverse cover crops can effectively provide orchard ground cover that displaces weeds, but that functionally diverse cover crops […]
Mowing depletes the energy stores in the rhizomes and can reduce new rhizome growth
Fertile spikelets are 0.15 to 0.25 inch long, and the smaller sterile spikelets may have bent and twisted awns up to 0.6 inch long. Rhizomes are branching, scaly, and fibrous, 0.5 inch or more in diameter, and reach up to 6 feet long. Rhizomes are usually cream or tan, may have reddish brown streaks, and […]
Analyses of variance were runfollowed by post-hoc multiple comparison tests
Exotic-induced changes to soil have been proposed as a limiting factor in native restoration success, with short-term greenhouse studies demonstrating that native perennial grasses perform worse in soil conditioned by exotic annuals . Exotic annual grass roots concentrate in the top 30 cm of soil while native perennial roots extend over 1 m and so invasion […]
The results demonstrated that talc powder is a more suitable diluent than wheat flour
The total seed weight was recorded, and we calculated the total seed production by weighing and averaging five groups of 100 seeds. A t-test was used to compare the differences in inflorescence growth and seed production for treatments using massive, irradiated pollen or non-irradiated pollen against the results from open pollination. This analysis was conducted […]
Some crops are more susceptible to injury when planted over metalized mulches
Summers and Stapleton have shown that tomatoes grown over reflective mulches averaged approximately 7 percent virus-infected plants, while plants grown over bare soil averaged in excess of 50 percent infection with the same viruses. This approach is currently the only viable means of managing virus disease in these production systems. Growers are cautioned to use only […]
This results in high seed predation by birds and also sunburn that reduces seed viability
In addition to diseases, the cause of some disorders of sunflower appears to be varietal and physiological, with no causal diseases yet identified. In one malady observed, the female lines do not drop their heads after pollination. No management recommendations exist for this disorder given that it appears to be varietal and physiological. Foamy head rot […]
Rapid local adaptation has been observed in invasive species as well as in biological control agents
Although we sampled populations from Uruguay, we sampled them from the Uruguay River, in‐between Argentina and Uruguay, and speculate that the sample is likely genetically similar to those weevils in Santa Fe, Argentina. Thus, rather than due to multiple introductions, the higher allelic richness in Florida, Texas, and California, USA, may have been due to […]
The weed-seedling map was based on cumulative counts of the seedlings
Weedy rice emerging in cultivated rice populations could be explained by the quick loss of a few domestication alleles in regions of the genome that experienced relaxation of selective pressure. Based on an evolutionary dynamic described in [75], the evolutionary genetic dynamics we observe here could be those of deep divergence of non-endemic wild species […]