Soil Nutrient Management for Hybrid Corn Grown in Acid Upland Soil of Eastern Samar Based on NuMASS Prediction
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- NuMASS, Lime, Nitrogen, Phosphorus
- Lacaba, Lito D.
- This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. CC BY-NC-SA 4.0 Creative Commons License: https://creativecommons.org/licenses/by-nc-sa/4.0/
- A field experiment was conducted at the Research Center of the Eastern Samar State University-Salcedo campus, Salcedo, Eastern Samar. This experiment was conducted to identify soil nutrient management practices in acid upland that favorably improves the growth and yield of hybrid corn; determine the optimum rate of nitrogen and phosphorus favorable for hybrid corn; determine the growth and yield of hybrid corn due to liming; evaluate the liming effect of organic matter; and, validate the diagnosis and prediction of NuMASS for hybrid corn in Eastern Samar. Grid samples were analyzed before and after the experiment. These samples served as basis for NuMASS prediction. Plot samples analysis was made before and after the experiment to determine changes in its chemical properties. Randomized Complete Block Design (RCBD) was used in the experiment involving three replications and 16 treatments. Results showed that exchangeable bases (Ca++, Mg++, K+) were increased due to liming thereby reducing the level of exchangeable H+ and Al3+. Moreover, the effective cation exchange capacity (ECEC) was increased; Al saturation was lower below the critical level thereby increasing pH and available P. Corn plants applied with the predicted level of nitrogen (180 kg/ha), phosphorus (60 kg/ha) and lime (4 t/ha) showed the highest yield (5,685.48 kg/ha) among the treatments indicating high reliability of diagnostic and predictive capability of NuMASS for N, P and lime. Applying one-half of the NuMASS recommended rate yielded only 1,557.81 kg/ha with a difference of 4,127.67 kg/ha from the recommended level. Two tons of lime applied failed to increase the exchangeable bases to lower the critical Al saturation of corn plants (
Full text: IJRAS-216_Final.pdf