Pedro is thinking of switching to organic fertilizers to supply N and P to his c
ID: 298618 • Letter: P
Question
Pedro is thinking of switching to organic fertilizers to supply N and P to his crops. The organic N and P present in the organic fertilizers are ____ to plants.
77. Once applied to soil, the organic fertilizer has to be ______to make the N and P in organic forms available to plants.
78. Which forms of N and P are produced by the process in Q. 77?
79. What biotic processes can transform the form of N in Q. 78?
80. The form of P in Q. 78 can be:
81. The form of N in Q. 78 can be:
82. Which of the following describes differences in N and P cycling in soil?
83. Pedro is thinking of a crop rotation that includes soybeans to help manage N fertility. How do soybeans contribute to N levels in soil?
84. The soybeans plants will have to be ______ in order for the N in plant biomass to become available to next year’s crop.
85. _______ could be involved in the processes in Q. 84.
86. Pedro is thinking of cutting back on tilling his fields and adopting no-till farming. He would also leave crop residues in the field. In the long run, how could this affect the soil structure in his fields?
87. Pedro’s changes will likely ______ the organic matter content of his soil.
88. Water infiltration in Pedro’s fields will likely ______ in response to his changes.
89. How could Pedro’s changes affect C sequestration in his fields?
Explanation / Answer
Pedro is thinking of switching to organic fertilizers to supply N and P to his crops. The organic N and P present in the organic fertilizers are ____ to plants.
Answer: Macronutrients
Explanation:
77. Once applied to soil, the organic fertilizer has to be ______to make the N and P in organic forms available to plants.
Answer: Converted to inorganic
But first these organic sources must be converted to inorganic forms before they are available to plants.
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