Phosphate is well-known for its ability to covalently bond to metal oxides,27,28 giving the potential to significantly alter their surface properties. Figure 5 shows that even at relatively low concentrations of PO4 3− , the ζ-potential of nano-CuO switches from positive to negative and becomes increasingly negative with increasing PO4 3− concentrations. This change in ζ-potential …
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Yield improvement is not the only form of varietal improvement
During the early 1980s, the adoption of drip expanded, and local dealers and personnel developed the skills to design and improve the systems. Currently, much of the design is done at the dealer level, and dealerships often have sales engineers who can design sophisticated drip systems. Some large farms are able to design their own …
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