Strip intercropping differs from row intercropping in that the crop strips are sufficiently wide to permit cultivation of each crop separately. The strips are sufficiently narrow, however, to cause adjacent crops to interact agronomically. Thus, strip width is critical to the structure and function of this cropping pattern. Often, the strips are rotated from year to year.


Fig. 9.5 Strip intercropping of maize, soybean, and oat in Iowa. (Photo courtesy of D. Dobill)


In addition to strip width, the combination of crops and row orientation influence the productivity of the system. What are some of the advantages and challenges of strip intercropping?

Study Question 9.2

Consider a strip intercropping system involving three crops: maize, soybean, and oat. The crops are rotated among strips each year in a 3-year rotation cycle. Maize strips consist of 6 rows each and all strips are the same width. Each crop is planted at its normal density and planting date.


a) Advantages of strip intercropping include (select all true statements):

Reduces the amount of herbicide needed on the field.
Reduces the fertilizer needed on the field.
Reduces soil erosion.
Reduces the risks of surface water contamination.
Reduces pest pressure.
Diversifies the vegetative structure.
Increases the yield of each crop in the system relative to their respective sole crop yields.
Reduces management required.
Reduces labor.

b) What is the purpose of rotation in this system?

c) In a maize strip, which rows are the most productive?

No yield difference among rows.
Outside rows.
Interior rows.

Explain your answer.

d) In a soybean strip, which rows are the most productive?

No yield difference among rows.
Outside rows.
Interior rows.

Explain your answer.