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Effect of irrigation frequency and nitrogen on groundnut yield and nutrient uptake


Effect of irrigation frequency and nitrogen on groundnut yield and nutrient uptake



Plant and Soil 65(2): 257-264



ISSN/ISBN: 0032-079X

DOI: 10.1007/bf02374656

Field experiments were conducted during 1970 and 1980 summer seasons on sandy loam soils of low moisture retentive capacity to study the effect of high frequency irrigation at different levels of N on groundnut yield and nutrient uptake (NPK). Four irrigation frequencies (irrigation at 2, 4, 6 and 8 cm cumuluative can evaporation, corresponding to irrigation once in 3, 5, 7 and 10 days, respectively) and 4 levels of N (0, 20, 40 and 60 kg N/ha) were tested in a factorial randomized block design with 3 replications. Pod yield of groundnut was maximum (3,293 kg/ha) when irrigations were scheduled at 4 cm cumulative can evaporation (once in 5 days). Addition of N did not increase the pod yield. N and P uptake by the crop was maximum (180 kg N and 18 kg P/ha) with high frequency irrigation of scheduling irrigation at 4 cm cumulative can evaporation. Highest uptake of N (183 kg/ha) and P (19 kg/ha) was with a combination of 20 kg N/ha and high frequency irrigation (4 cm CCE [cumulative can evaporation]). K uptake was low with low irrigation frequency, while it was highest (67 kg K/ha) at 20 kg N/ha.

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Accession: 001068040

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