Please use this identifier to cite or link to this item:
|Authors:||BABANRAO, DAHALE PRASHANT|
|Title:||BEHAVIOUR OF POTASSIUM IN RELATION TO CHEMICAL PROPERTIES AS INFLUENCED BY LONG TERM APPLICATION OF ORGANIC SOURCES|
|Publisher:||MAHATMA PHULE KRISHI VIDVAPEETH, RAHURI - 413 722, DIST. AHMEDNAGAR (M.S.), INDIA|
|Abstract:||A long term field experiment was started from the year 1990-91 to study the effect of every year (EY), alternate year (AY) and after two year (TY) applications of spent wash solids (SWS) and spent wash press mud compost (SWC) in comparision with press mud cake (PMC) and farm yard manure (FYM) on yield and nutrient uptake by wheat crop on soil properties. The results pertaining to the effects of organic sources on soil chemical properties and on the performance of wheat crop at seventh year (1996-97) of experimentation are reported. In addition, the effects of organic sources effect on depthwise distribution of forms of potassium, potassium release and potassium fixation capacity of soil are also reported alongwith the relationship between chemical properties, K behaviour and yield of wheat crop are also reported. Results obtained showed that SWS, SWC and PMC effect on wheat grain were comparable with each other. The SWS increased uptake of N and K. The PMC ranked second in N and K uptake. The EY application proved better in nutrient uptake than AY and TY applications. The EY with SWS was proved superior except in P uptake. The application of SWS increased the thousand grain weight (46.07 gm). The protein content in wheat grain was increased by application of spent wash solids (16.77%) and press mud cake ranked second (14.61%). The application of SWS found superior for increase in the grain and straw yields of wheat. From the results it was revealed that use of organic sources every year resulted in lowering the soil pH and significantly increased EC and CaC03 content. Their use also improved organic matter status of soil. Contribution of organic sources to increase exchangeable bases and cation exchange capacity was also found better. Top layer showed higher organic carbon than subsurface layers. There was an increase in all the soil chemical properties with depth as compared to subsurface layer. SWS was found superior than all other organic sources. Horizonwise assessment of soil for forms of potassium indicated decrease in water soluble K, exchangeable K and step K release with depth. However, depth wise increase in non-exchangeable K, total K and K fixation capacity of soil was noticed. Every year use of SWS resulted in increasing the forms of K, K release and K fixation capacity of soil. Other sources were also found better than control. All the chemical properties except pH showed positive and significant correlation with forms of K, K fixation capacity of soil and K release. All the forms of K were positively and significantly correlated with each other. Wheat yield was positively and significantly correlated with soil chemical properties as well as forms of K, K release and K fixation capacity of soil.|
|Appears in Collections:||Thesis|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.