@article{Nkoa:230501,
      recid = {230501},
      author = {Nkoa, Roger and Ondoua, Boris and Voroney, Paul and  Tambong, James},
      title = {Evidence of the Interaction Between Crop Species and  Organic Amendments: Modelling of the Differential Grain  Yield Response of Wheat, Soybean, and Canola to Organic  Amendments},
      journal = {Sustainable Agriculture Research},
      address = {2014},
      number = {526-2016-37914},
      year = {2014},
      abstract = {Knowledge on the interaction between plants and organic  amendments is critical for the basic understanding of  agroecosystems sustainability. Organic amendments are of  great interest in agriculture by virtue of their ability to  restore lost soil organic carbon in eroded or  conventionally cultivated soils. The major objective of  this study was to demonstrate and model the differential  response of crop species to organic amendments. Despite the  potential of such an interaction to improve crop  production, it has never been formally demonstrated in a  planned experiment. A two-year greenhouse experiment set as  3×3×5 factorial in a strip-split plot design was conducted.  The effects of crop species, type of organic amendment, and  application rates on grain yield of soybean, canola, and  wheat were evaluated. To account for the asymmetry of the  concave responses of soybean, mathematical transcendental  models were fitted, for the first time, to yield data. The  interaction between crop species and amended soils was  highly significant. Soybean displayed concave  transcendental yield responses whereas canola and wheat  exhibited negative exponential responses, irrespective of  the type of amendment. Turkey compost outperformed turkey  litter and beef manure by 30% and 52%, respectively, with  respect to soybean production; whereas turkey litter  outperformed turkey compost and beef manure by 144% and  264%, respectively, with respect to canola and wheat  production. It is concluded that in greenhouse settings and  perhaps field conditions, growth and development of crop  species can be enhanced by matching the specific  characteristics of organic amendments to the specific  nutrients demand of crop species.},
      url = {http://ageconsearch.umn.edu/record/230501},
      doi = {https://doi.org/10.22004/ag.econ.230501},
}