Answered: A farmer is considering planting maize,…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A farmer is considering planting maize, wheat or ryegrass in a 30 hectare field. Table 1 gives values for the amount of Nitrogen (N) and phosphorus (P) removed from the soil by maize, wheat or ryegrass. Table 2 shows the balance between the inputs and the outputs of phosphorus within the 30 hectare field. 1.) Using the tables, calculate the next soil phosphorus balance if: a. Wheat was planted b. Maize was planted c. Ryegrass was planted 2.) identify the crop which produces the greatest phosphorus stress within the soil. 3.) suggest what steps the farmer may take to avoid phosphorus loss within the soil.

Table 1 Phosphorus production for three cereal crops.
P/ kg ha 1
P/ kg ha 1
Wheat
24
Inputs
Maize
35
fertilizer
48
Ryegrass
N dissolved in rainfall or blown in
15
30
N held within organic matter in soil.
17
TOTAL
Outputs
(from table
сгор
N held within organic matter in soil
24
Table 2 Phosphorus inputs and outputs
within the 30 hectare field.
drainage losses
14
other losses
3
TOTAL

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