An ecosystem supported by photosynthetic organisms, 40,000 KJ is available to the primary producers, what amount of this energy
reaches the Secondary consumer?

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation