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Response of corn zea mays to phosphorus potassium fertilization grown in a latosol in south sulawesi indonesia



Response of corn zea mays to phosphorus potassium fertilization grown in a latosol in south sulawesi indonesia



Communications in Soil Science & Plant Analysis 16(11): 1179-1188



Corn (Zea mays L.) is next to rice as an important food crop grown in South Sulawesi, Indonesia. However, yields obtained by farmers are rather low, around 0.6 to 1.0 ton/ha. Efforts to increase yield have been tried through the application of NPK fertilizers. A study was conducted to determine the effects of N, P and K application on corn yield and what soil constrains, in terms of nutrient elements in the corn plants, exist in the latsols found at Desa Tokka, Sinjai, and South Sulawesi. It was found that application of K significantly increased the growth and corn grain yields on the latosols at Sinjai. Without K, grain yield and the K content in the ear leaf were low. The correlation between grain yield and rate of K shows that an application of 72 kg K2O/ha together with 90 kg N and 80 kg P2O5 per ha produce the best yield of 3.6 tons/ha. The K content in the ear leaf of 1.8% was related to this maximum yield.

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