Journal article

Publication year: 1981

Pages: 23-31

Journal: Plant and Soil

Volume number: 59

Issue number: 1

ISSN: 0032-079X

eISSN: 1573-5036

DOI Link: https://doi.org/10.1007/BF02183589

Publisher: Springer

Abstract: 
K in wetland rice soils from 5 different locations in the Philippines was analyzed using the electroultrafiltration (EUF) technique and by extraction with N NH4 acetate (pH 7). The soils contained low exchangeable K and responded to K application. The K soil test values were calibrated against the rice response to K application under field conditions. EUF-extractable soil K correlated highly significantly with the rice yield response to K fertilizer, whereas the NH4 acetate extractable K (exchangeable K) did not. Under limiting K supply in soils, rice yield depends more on the EUF-K that on the exchangeable K. Maximum grain yields were obtained when the EUF-K values after harvest and before wetland preparation were > 30 ppm K.

Harvard Citation style: WANASURIA, S., DEDATTA, S. and MENGEL, K. (1981) RICE YIELD IN RELATION TO ELECTROULTRAFILTRATION EXTRACTABLE SOIL POTASSIUM, Plant and Soil, 59(1), pp. 23-31. https://doi.org/10.1007/BF02183589

APA Citation style: WANASURIA, S., DEDATTA, S., & MENGEL, K. (1981). RICE YIELD IN RELATION TO ELECTROULTRAFILTRATION EXTRACTABLE SOIL POTASSIUM. Plant and Soil. 59(1), 23-31. https://doi.org/10.1007/BF02183589