Soil Test Based Fertilizer Recommendation for Maize Grown in Inceptisols of Jagtiyal in Andhra Pradesh
2000; Indian Society of Soil Science; Volume: 48; Issue: 1 Linguagem: Inglês
ISSN
0974-0228
Autores Tópico(s)Rice Cultivation and Yield Improvement
ResumoA maize experiment on soi! test crop response (STCR) correlation studies was conducted in Inceptisols of Jagtiyal in Karimnagar district of Andhra Pradesh during kharif 1995. Multiple regressions have been calibrated for predicting maize yield through soil and fertilizer nutrients and their interactions. The models were found to have a high and significant predictability value. Using the data, fertilizer adjustment equations have also been developed for prescribing optimum fertilizer doses for attaining different yield targets. The nutrient requirement (kg q−1) of N, P2O5 and K2O were found to be 1.66, 1.12 and 1.55, respectively for producing one quintal of maize yield in Inceptisols. The per cent nutrient contributions from soil and fertilizers were 10, 50 and 17; and 40,70 and 105 of N, P and K nutrients, respectively in these inceptisols. The fertilizer adjustment equations and a ready reckoner of optimum fertilizer doses at varying soil test values for allaining yield target of 40 and 50 q ha−1 of maize yield have been calibrated based on the targelled yield concept. Field verification trials were conducted in the farmers' field s of Karimnagar district and the targelled yields could be successfully achieved. The targelled yield equations and the fertilizer ready reckoner developed for maize grown in Inceptisols are useful for large-scale recommendation by the soil testing laboratory of Karimnagar district.
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