Different crops use different nutrients in the soil. if the same crop is planted in a field year after year, soon the nutrients the crop needs will be used up. what measure do many farmers take in order to control this issue?

By practicing crop rotation

Explanation:

Crop rotation is an agricultural practice in which farmers carry out recurrent succession of crops on the same piece of land in different growing seasons.

Successive crops in a crop rotation regime have different characteristics based on the part of the soil they utilized for their growth.

For example, a crop that utilize nutrients from the surface of soil (surface feeder) may be planted in a season while another plant that utilizes nutrients from the deeper part of the soil (deep feeder) may be planted in its place the following season.

This practice will give ample time for the surface soil nutrient to be replenished before another surface feeding crop is planted.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.