An array of current programs defray the costs for crop and environmental protections, such as fences to keep cows (and their manure) out of waterways, or for education in pesticide-free crop management.
Agricultural implements should be carefully cleaned after any operation or cultivation in an infested area so that seeds or vegetative parts of the weed are not transported further into the weed-free crop areas.
It is thus important to understand exactly how PAHs are transported into the plant root system and into the human food chain, since it is helpful to produce PAH-free crop products by means of genetic engineering, to remove PAHs from PAH-polluted soils or water through phytoremediation, and to model potential uptake for risk assessment.
Additionally, it is also a very effective technique in improving the nutritional value of crops, producing pest-resistant, abiotic stress-resistant, herbicide-resistant, and disease-free crops.
This separation of characteristics into those of greatest benefit to weed-free crops or in crop-weed competition, suggests that there is the potential for tailoring root characteristics to specific conditions.
With news reports of toxic cadmium-tainted rice in China, a new study describes a protein that transports metals in Arabidopsis plants and holds promise for developing iron-rich but cadmium-free crops.
Parameters controlling the efficient distribution of roots through soil (geotropism index, deflection index, branch angle), and physiological parameters determining the rate of phosphate influx into roots (P uptake kinetics), ranked highest for weed-free crops.
Reducing tillage in herbicide-free cropping systems is a challenge for farmers and few studies have attempted to identify the limitations of organic no-till systems over a period of time greater than two years.
Although the findings reinforce the difficulty of growing GM-free crops, they also suggest that the levels of gene diffusion are below European standards for contamination of conventional food.
