Which of the following actions should be taken first when determining how to fertilize turf in which the grass is proving unusually susceptible to diseases and pests? apply a high-nitrogen chemical fertilizer until grass shows signs of improvement

withhold fertilizer prior to testing soil for chemical balance

eliminate weeds prior to applying a 20-20-20 organic fertilizer

apply a top-dressing of organic compost to the mowed, dethatched, and aerated grass

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

c.more precipitation,but only when emission levels.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.