Fertilizers have a "reciprocal relationship" and a "contrast" contradiction. If more phosphate fertilizer is applied, the excess available phosphorus is combined with the available zinc in the soil to form a poorly soluble zinc…

The inkjet printer is the main machine equipment for the trademark engraving of the product and the date…

Onions, alias onion, onion, common purple, yellow, white three, is a common vegetable. Onion tender meat, spicy flavor, juice, high nutritional value, with hypolipidemic, promote digestion, refreshing health, bactericidal anti-cold, cancer prevention, diuretic and …