How might planting a crop of soybeans and turning the plants under at the end of the harvest season improve the soil in that field? a) it would make the soil richer in phosphorus and potassium. b) it would break up the soil and add phosphorus to it. c) it would increase the amount of ammonia and carbon in the soil. d)it would add organic material and nitrate to the soil.

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Which beat describes the brain stem

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants