A study in wheat fields showed that high levels of carbon dioxide in the atmosphere impair the absorption of nitrate by plants. Consequently, the nutritional quality of these foods may decrease as the levels of carbon dioxide in the atmosphere reach estimates for the coming decades. In this context, the nutritional quality of the wheat grain will be modified primarily by reducing which element?

The following macronutrient does not occur as a gas: Group of answer choices Oxygen Nitrogen Phosphorous  Carbon Hydrogen

N Cylcle: Match the steps of the Nitrogen Cycle you would find beneficial based on the professions/goals listed below Farmer wishes to increase vegetable [Choose] production [Choose ] Farmer wishes to decrease runoff of nitrate containing fertilizers in irrigation water denitrification nitrogen fixation and nitrification sewage plant operator wishing to decrease frequeny of HAB's from treated sewage dumped into Sacramento River [ Choose ] water quality consultant working with public who are using many nitrate containing fertilizers; consultant wishes to increase water quality and clarity in Lake Tahoe, [ Choose ]

(3) Based upon what we have read, all of the following are potential negative effects of our concentration on growing biofuels (e.g. corn for ethanol production) except: (a) Disappearing Brazilian rainforest used for growing corn (b) Destruction of natural petroleum reservoirs beneath the Alaskan National Wildlife Reserve (c) Decreased resources to fight famine in Africa and other impoverished areas in the world (d) National focus to find or develop practical resources for future energy production

Which of the following is an example of a secondary consumer? a)A spider that eats herbivorous insects b)A plant that uptakes nutrients from the soil c)A cow that eats grass d)A shark that eats a tuna that eats other fish

- Situation 3: Irrigation was used when soil moisture dropped to 1%. a. If irrigation begins when soil moisture reaches 49%, what application of nitrogen will result in the lowest percentage of protein in wheat grain? b. If irrigation begins when soil moisture reaches 34%, what application of nitrogen will result in the same protein content of wheat grain as begin- ning irrigation when soil moisture reaches 1%? c. If you irrigate when soil moisture reaches 34%, how much nitrogen should you apply to achieve a 13% protein content in wheat grain? d. Does Figure 1.45 indicate that, for nitrogen levels at 45 pounds per acre or higher, increased protein content in wheat grain is associated with higher or lower soil moisture? 14 1% 13+ 34% 12 49% 11+ 10- 6, 40 60 80 100 120 140 Nitrogen FIGURE 1.45 Protein content versus availability of nitrogen % Protein 20

What is nutrient “mineralization” and why is it important in nutrient cycling?

*Do not use the picture I sent yet*____Secondary production occurs after primary production, after all of the products needed for respiration are used by an organism • True • False --------- A detritus is an important organism in the environment because it will break down organic matter that can be recycled and reused by other organisms. • True • False -------- use the diagram (picture) I posted and answer this question by choosing an option below:  The rate of mass loss, is _____ related to ______. * positively, the lignin to nitrogen ratio * negatively, the nitrogen content * positively, the lignin content * negatively, the lignin to nitrogen ratio

What is the nitrogen cycle?  (This question is asking for a general overview)

of biologically available nitrogen? What inorganic nitrogen pool is composed of N2 and in the ultimate source (one word)