SULPHUR DYNAMICS AND ITS CRITICAL LIMITS FOR FRENCH BEAN AND CAULIFLOWER IN ACIDIC SOILS OF HIMACHAL PRADESH.
| dc.contributor.advisor | Sankhyan, N. K. | |
| dc.contributor.author | Gourav | |
| dc.date.accessioned | 2019-11-02T07:27:05Z | |
| dc.date.available | 2019-11-02T07:27:05Z | |
| dc.date.issued | 2019-07 | |
| dc.description.abstract | Sulphur is best known for its essentiality and vitality in crop production, but due to its widespread deficiency, it is imperative to study its transformations in acidic soils. In the present investigation, 500 soil samples were collected randomly from cultivated acidic soils of Himachal Pradesh, as identified during previous surveys conducted by Department of Soil Science, CSK HPKV Palampur. Processed soil samples were analyzed for pH, soil texture and available sulphur. Five soil profiles were also selected randomly to study the vertical distribution of S. The transformation of sulphur with externally added elemental sulphur was studied in twenty one incubated soil samples, which varied in pH and texture. Further, 10 locations were selectedthat varied in pH, clay content and available S to study the response and to establish critical limits of S for french bean and cauliflower; furthermore the detailed experiment was conductedin pots under glasshouse. In study area, textural class, pH (1:2.5) and available sulphur ranged from loamy sand to clay, 4.23 to 7.00 (extremely acidic to neutral) and 11 to 65 kg ha-1 (deficient to sufficient) respectively. Around 35 per cent of the soil samples were found deficient in available sulphur. Available S exhibited a significant positive correlation with clay and silt, whereas significantnegative correlation was found with sand and pH. All the S fractions (sulphate-S, water soluble-S, heat soluble-S, organic-S and total-S) increased with incubation of soil samples and added elemental S. The highest content of these S fractions were obtained with the application of 80 kg S ha-1. Sole incubation of soil for thirty days without the addition of S, increased all the S fractions except organic-S. Contents of all the S fractions in soils increased with increase in clay and decreased with increase in pH of soil. In soil profiles study, all the S fractions decreased with increase in depth and highest contents of all the S fractions were found in surface layer. Sulphur fractions followed the order as total-S>organic-S>heat soluble-S>sulphate-S>water soluble-S. French bean and cauliflower responded significantly to the S application. Highest yield and yield attributes were obtained with the application of 40 kg S ha-1 in both the crops. However, the green pod yield in french bean at 30 kg S ha-1 was statistically at par with 40 kg S ha-1. Critical limits for french bean and cauliflower in soil were found to be 9.5 mg kg-1 and 10.5 mg kg-1, respectively. Whereas, the critical limits for french bean and cauliflower in plantswere found to be 0.103 per cent and 0.337 per cent sulphur, respectively. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810133835 | |
| dc.keywords | French Beans | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 157 | en_US |
| dc.publisher | CSKHPKV, Palampur | en_US |
| dc.sub | Soil Science | en_US |
| dc.theme | To study spatial distribution of sulphur in acidic soils of Himachal Pradesh. | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | SULPHUR DYNAMICS AND ITS CRITICAL LIMITS FOR FRENCH BEAN AND CAULIFLOWER IN ACIDIC SOILS OF HIMACHAL PRADESH. | en_US |
| dc.type | Thesis | en_US |