Recommendation of Phosphate and Potassium Fertilizers for Maize at Five Locations in Lampung

Fertilizer recommendation in specific location will be related to fertilizers efficiency. The studywas conducted at five locations which were planted with corn minimal once a year, namely: (1) Sidowaras village,Bumi Ratu Nuban Subdistrict, Lampung Tengah Regency; (2) Binjai Ngagung, Bekri Subdistrict, Lampung SelatanRegency; (3) Watu Agung, Kalirejo Subdistrict, Lampung Tengah Regency, (4) Balai Rejo, Kalirejo Subdistrict,Lampung Tengah Regency, and (5) Trimulyo, Tegineneng Subdistrict, Lampung Selatan Regency. The soil sampleswere analyzed in the Research and Development Centre for Soil and Agroclimate Laboratory in Bogor. The value ofP and K in soil were compared to the results of correlation study using several extraction of P and K in Lampung.Results of the study showed that the status of P was high for three location, medium for one location and low for onelocation. K status was low for five locations. Phosphorus fertilizer recommendation on the three locations with highlevel of P (Sidowaras, Binjai Ngagung, and Balai Rejo) was 75 kg ha-1 SP-36, on the middle P levels (Trimulyo) was150 kg and on the low level of P (Watu Agung) was 300 kg. On the other hand, the recommendation for K fertilizer forall locations were 150 kg ha-1 KCl.