Soil and Plant Fertility Management for Soybeans


Autoria(s): Lee, James M.
Data(s)

01/01/2011

Resumo

Producers utilizing a two year rotation of corn and soybean often apply fertilizer on a biannual basis, spreading recommended amounts of phosphorus and potassium for both crops prior to corn establishment. This approach minimizes application costs and is in accordance with university fertility recommendations that have found a low probability of fertilizer yield response when soils tested at the medium/optimum level or above. However, the field trials on which these state recommendations were developed are often several decades old. Increases in average corn and soybean yields and associated increases in crop nutrient removal rates have called into question the validity of these recommendations for current production environments. This study investigated the response of soil test levels and grain yield to annual and biannual fertilizer applications made at 1x and 2x rates of current university fertilizer recommendations.

Formato

application/pdf

Identificador

http://lib.dr.iastate.edu/farms_reports/12

http://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1011&context=farms_reports

Idioma(s)

en

Publicador

Digital Repository @ Iowa State University

Fonte

Iowa State Research Farm Progress Reports

Palavras-Chave #RFR A11106 #Agronomy #Agriculture #Agronomy and Crop Sciences
Tipo

text