Characterising soil phosphorus and potassium status in lowland and upland rice-cropping regions of Indonesia
2000
Clough, A. | Widjaja-Adhi, I.P.G. | Sri Adiningsih, J. | Kasno, A. and Fukai, S.
Mapping of extractable soil phosphorus (P) and potassium (K) began in Indonesia to define soil fertility in lowlands and uplands that were under rice or likely to be brought under cultivation. These maps, however, have not been published and have therefore been largely inaccessible to researchers outside of Indonesia. This chapter reviews the history of soil P and K map production in Indonesian lowlands and uplands, how mapping has been used to improve P and K fertilizer recommendations in mapped regions, and limitations of the present mapping approach in determining accurate P and K fertilizer requirements.
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