Hostname: page-component-745bb68f8f-cphqk Total loading time: 0 Render date: 2025-01-09T03:56:42.925Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Component Densities and Nitrogen Fertilization on Efficiency and Yield of a Maize/Soyabean Intercrop

Published online by Cambridge University Press:  03 October 2008

J. T. Russell  and
R. M. Caldwell
J. T. Russell
Affiliation:
Department of Agronomy, University of Maryland, College Park, MD 20742
R. M. Caldwell*
Affiliation:
Department of Agronomy and Soil Science, University of Hawaii, Honolulu, HI 96822
*
† Author to whom correspondence should be addressed.
Get access Rights & Permissions [Opens in a new window]

Summary

A field study was conducted in 1985 at two locations in Maryland, USA, to test the influence of environment (location), input level (N fertilization), management (component density combinations), and measure of performance on recommendations for a maize/soyabean intercrop. Location affected the degree of intercrop yield depression of each crop; the effect of N on relative competitive abilities; the maximum Land Equivalent Ratio (LER) and maximum modified Staple Land Equivalent Ratio (SLER); the difference between LER and SLER; the optimum density combinations and change in optima in response to N; and the N level at which the greatest land use efficiency was achieved. Given the complexity of the environmental effects, recommendations based on the trials have a very narrow range of applicability.

Type
Research Article
Information
Experimental Agriculture , Volume 25 , Issue 4 , October 1989 , pp. 529 - 540
Copyright
Copyright © Cambridge University Press 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Ahmed, S. & Rao, M. R. (1982). Performance of maize-soybean intercrop combinations in the tropics: Results of a multi-location study. Field Crops Research 5:147–161.CrossRefGoogle Scholar
Crookston, R. K. & Hill, David S. (1979). Grain yields and land equivalent ratios from intercropping corn and soybeans in Minnesota. Agronomy Journal 71:41–44.CrossRefGoogle Scholar
Hiebsch, C. K. (1980). Principles of Intercropping: Effects of Nitrogen Fertilization, Plant Population, and Crop Duration on Equivalency Ratios in Intercrop versus Monoculture Comparisons. PhD Dissertation, Order No. 81 11031. Raleigh: North Carolina State University.Google Scholar
Mead, R. & Stern, R. D. (1980). Designing experiments for intercropping research. Experimental Agriculture 16:329–342.CrossRefGoogle Scholar
Mohta, N. K. & De, R. (1980). Intercropping of maize and sorghum with soya bean. Journal of Agricultural Science, Cambridge 95:117–122.CrossRefGoogle Scholar
Putnam, D. H., Herbert, S. J. & Vargas, A. (1985). Intercropped corn-soyabean density studies. I. Yield complementarity. Experimental Agriculture 21:41–51.CrossRefGoogle Scholar
Reddy, M. Narayana & Chetty, C. K. Ramanatha. (1984). Staple land equivalent ratio for assessing yield advantage from intercropping. Experimental Agriculture 20:171–177.CrossRefGoogle Scholar
Singh, J. N., Negi, P. S. & Tripath, S. K. (1973). Study on the intercropping of soybean with maize and jowar. Indian Journal of Agriculture 18:75–78.Google Scholar
Willey, R. W. (1979a). A scientific approach to intercropping research. In Proceedings of the International Workshop on Intercropping, 4–14. Hyderabad, India.Google Scholar
Willey, R. W. (1979b). Intercropping - its importance and research needs. Part 1. Competition and yield advantages. Field Crop Abstracts 32(1):1–10.Google Scholar
Willey, R. W. (1979c). Intercropping - Its importance and research needs. Part 2. Agronomy and research approaches. Field Crop Abstracts 32(2):73–84.Google Scholar
Willey, R. W. & Rao, M. R. (1980). A competitive ratio for quantifying competition between intercrops. Experimental Agriculture 16:117–125.CrossRefGoogle Scholar