Response of soyabeans to potassium fertilizer and availability of potassium in a dystrophic red Latosol
Borkert, C.M.; Farias, J.R.B.; Sfredo, G.J.; Tutida, F.; Spoladori, C.L.
Pesquisa Agropecuaria Brasileira 32(12): 1235-1249
ISSN/ISBN: 0100-204X Accession: 003259563
In field trials in 1983-92 on a dystrophic red Latosol in Maua da Serra, Parana, Brazil, soyabeans were given 0, 40, 80, 120, 160 or 200 kg K2O/ha annually for the first 5 years and no K for the following 5 years. It was concluded that Latosols, with low K availability, could not cultivated without corrective and maintenance applications of K fertilizer.