Potassium in Coconut Growing Soils
| dc.contributor.author | Biddappa, C.C. | |
| dc.contributor.author | Cecil, S.R. | |
| dc.contributor.author | Khan, H.H. | |
| dc.date.accessioned | 2014-07-16T10:14:14Z | |
| dc.date.available | 2014-07-16T10:14:14Z | |
| dc.date.issued | 2007-02 | |
| dc.description.abstract | Coconut is generally cultivated in acid laterite, lateritic and red soils where the K content is low. The critical level of soil potassium is between 0.15 to 0.20 me 100g, equivalent to 59-78 ppm of potassium. Based on the assumption that about 80 ppm K is needed to maintain the optimum K content in the diagnostic leaf (0.8-1.0%) a desorption equilibrium model has been developed for laterite and sandy loam soils from which site specific recommendations can be successfully made. The absorption of K by coconut not merely depends on the absolute K concentrations in situ but it depends on relative concentrations of Na+, Mg++, Ca** and NH4+ in the soil. This is primarily because of the antagonism offered by these ions in the uptake of K by coconut. The selective distribution of applied K in the soil indicated that the major portion of K would be held in the boiling HN03 fraction followed by IN NH4OAc extractable form. The desorption studies showed that about 80% of the applied K could be desorbed within 2-3 extractions and further desorption is very steady upto 10 subsequent extractions. | en_US |
| dc.identifier.citation | Symposium on potassium for plantation crops. Bangalore (6-8 November, 199d) | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/4176 | |
| dc.language.iso | en | en_US |
| dc.title | Potassium in Coconut Growing Soils | en_US |
| dc.type | Article | en_US |