“STUDIES ON EFFECT OF LONG TERM SOIL FERTILITY MANAGEMENT ON BEHAVIOUR OF POTASSIUM IN RICE-COWPEA CROPPING SYSTEM
| dc.contributor.advisor | JAGADEESH, B R | |
| dc.contributor.author | DIVYA, M | |
| dc.date.accessioned | 2016-11-02T12:57:18Z | |
| dc.date.available | 2016-11-02T12:57:18Z | |
| dc.date.issued | 26-08-13 | |
| dc.description.abstract | An experiment was conducted at Zonal Agricultural Research Station, VC farm, Mandya to study the effect of long term soil fertility management on behavior of potassium with respect to different forms, their distribution pattern, and fixation and release characteristics in rice-cowpea cropping system. Soil samples collected at 0-15cm and 15-30cm were analyzed for physico-chemical properties, major and micro nutrients as well as different forms of K, K fixation capacity and K releasing characteristics. The plant samples were analyzed for nutrients composition after harvest of the crop then potassium uptake was calculated. Results indicated that continuous use of chemical fertilizers along with manures increased the organic carbon, available primary, secondary and micronutrients content. Yield and yield attributes were also high in those particular treatments. The water soluble, exchangeable and non-exchangeable forms of potassium were relatively higher due to addition of organic manures continuously for longer period. The K fixation capacity didnot vary much between the treatments. The treatments having more of non-exchangeable K recorded high amounts of cumulative K released. A significant positive relationship was observed between grain yield with physico- chemical properties and available K which was positively correlated with exchangeable and water soluble K fractions. However, K fixation capacity was positive with non exchangeable and total K fractions at both depths. From this study it could be concluded that for maintaining the K supplying power of these soils which are sandy loam in texture for longer period needs regular application of K through K fertilizers integrated with organic manures. | en_US |
| dc.identifier.other | TH-10611 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/83327 | |
| dc.language.iso | en | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Bangalore | en_US |
| dc.sub | Soil Science and Agriculture Chemistry | |
| dc.subject | potassium, crops, fertilizers, farmyard manure, rice, organic fertilizers, yields, nutrients, grain, cropping systems | en_US |
| dc.title | “STUDIES ON EFFECT OF LONG TERM SOIL FERTILITY MANAGEMENT ON BEHAVIOUR OF POTASSIUM IN RICE-COWPEA CROPPING SYSTEM | en_US |
| dc.type | Thesis | en_US |