In acid soils the principal chemical form of phosphorus available for plant uptake is ________
A) P2O5 B) P3- C) H2PO4- D) HPO42- E) P3+
C
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Because of the potential for abuse and to solve problems of timekeeping, some companies use a system of ___________________ for checking individuals in and out of jobsites.
Fill in the blank(s) with the appropriate word(s).
Recent research with annual crops such as wheat, sunflower and sorghum in the Great Plains region suggests that, compared to continuous cropping, soil quality, crop productivity and farm profitability are likely to be greater when crops are grown in a field only every second year with the soil keep free of weeds in the non-crop year by repeated cultivation of herbicide application
Indicate whether the statement is true or false
Honda hybrids will still use the 12-volt battery and conventional starter motor under what conditions?
A) SOC of the battery module is low B) Failure of the IMA system C) Ambient temperature is below 0°F D) Any of the above
An expansion joint is a device used to ____.
A. prevent damage between boiler sections B. connect the expansion tank into the system C. allow for expansion and contraction of the loop piping with water temperature changes D. connect the manual vent into the system