$9.$ Monoammonium phosphate $($MAP$)$ and di$-$ammonium phosphate $($DAP$)$ are both fertilizers that supply nitrogen and phosphorus. MAP has a $\_\_\_\_$ pH effect on the soil compared to DAP, which can make it more suitable for $\_\_\_\_$ soils.

$-$ Options: lower, acidic, alkaline, neutral, higher, saline

$10.$ Potassium chloride and potassium sulfate are two common potassium fertilizers. Potassium sulfate is often preferred for $\_\_\_\_$ crops because it does not contain $,$ which can be harmful to certain plants, unlike potassium chloride, which is more $\_\_\_\_.$

$-$ Options: chloride$-$sensitive$,$ chloride, economical, sulfate, luxury, potassium$-$rich

$11.$ The Haber$-$Bosch process revolutionized agriculture by fixing atmospheric $\_\_\_\_$ into $,$ which is then used to manufacture synthetic ammonia, a key ingredient in $\_\_\_\_$ fertilizers.

$-$ Options: nitrogen, ammonia, nitrogenous, oxygen, hydrogen, phosphatic

$12.$ In the production of nitric acid via the Ostwald process, ammonia is first oxidized to nitric oxide, which is then further oxidized in the presence of $\_\_\_\_$ to form $\_\_$ acid, highlighting the importance of catalysts like $\_\_\_\_$ in the process.

$-$ Options: oxygen, nitric, platinum, carbon dioxide, sulfuric, gold