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Articles by Surendra Singh
Total Records ( 3 ) for Surendra Singh
  Prem Kishor , A.K. Ghosh , Surendra Singh and B.R. Maurya
  Parthenium hysterophorus L., being a declared invasive weed is threatening the biodiversity and human health in several areas of India. Several researchers have documented the allelopathic effect of this weed. Therefore, Parthenium management would remain a great concern of the century. However, several studies proposed that Parthenium can be used as a Green manure, compost, biocontrol, soil ameliorate that may improve physical, chemical and biological properties of the soils and is a source of readily available plant micro- and macro-nutrients. Numerous studies revealed that the integrated use of Parthenium in soil modifies the physico-chemical, biological and nutritional quality of the soil. Parthenium has great potentiality in agriculture due to its efficacy in modification of soil health and crop performance. The high concentration of elements (N, P, K, Fe, Mn, Cu and Zn) in composted Parthenium increases the yield of many agricultural crops. An exhaustive review of numerous studies of last two decades took place in this study, which systematically covers the importance, scope and apprehension regarding utilization of Parthenium in agriculture. Parthenium hysterophorus can be used as a bioherbicide. Appreciable quantity of nutrients in Parthenium can be utilized to nourish the crops after composting and a lot of green Parthenium can be destroyed. This suggests that composting of uprooted Parthenium, or use as a green manure and Parthenium extract may reduce its spreading and inhibit the weed growth as well as menace of human health hazards worldwide.
  Aditya Kumar , Surendra Singh and Sumer Pal Singh
  Basmati rice varieties are well known for their pleasant aroma and good grain and cooking quality characteristics. These varieties are in general, poor yielders. The yield potential of basmati varieties can be enhanced by the exploitation of heterosis as also reflected by the huge success of PRH 10. Keeping in view, the significance of heterosis, 28 F1 S excluding reciprocals were developed using 8x8 diallel. Mid parent, better parent and standard heterosis were estimated for yield and its components. Crosses Pant Sugandh Dhan 15 x UPR 2845-6-3-1, Pant Sugandh Dhan 15 x UPR 3003-11-1-1 and Pant Sugandh Dhan 17 x UPR 3003-11-1-1 had shown high standard heterosis for grain yield (309.53, 244.45 and 255.56%), biological yield (158.47, 150 and 124.58%) and for harvest index (58.6, 37.8 and 58.4%).
  R.P. Tripathi , Peeyush Sharma and Surendra Singh
  High yields of rice (Oryza sativa L.) and wheat (Triticum aestivum L.) achieved in India following the green revolution have tended to decline after 5 to 8 years of continuous production in the same field. We hypothesized that degradation of soil physical quality was responsible for the yield decline because nutrient, pesticide and irrigation management were relatively well optimized. A soil physical quality assessment model was thus developed using 4 years of data from tillage and crop residue experiments conducted on a silty clay loam (Aquic hapludoll) at the Crop Research Centre, Pantnagar, India. Tillage for rice increased Bulk Density (BD) and Puddling Index (PI) and decreased saturated hydraulic conductivity (Ks), porosity (f) and Infiltration Rate (IR) over the 4 years. Changes in soil properties were significantly higher in the plots puddled by 4 Passes of Rotavator (PR) and in Conventional Puddling (CP) plots than in reduced puddling (ReP) and Direct Seeding Without Puddling (DSWP) plots. The crop residue management and wheat tillage treatments did not significantly influence soil physical properties in the 4 years time but the negative effect of puddling on soil properties was more in the Residue Removed (RR) plots than in the Residue Incorporated (RI) plots. Rice yield was highest in PR, which was at par with that in CP and ReP plots and wheat yield was highest in DSWP, which was at par with that in ReP, irrespective of tillage levels for wheat. Decrease in rice and wheat yields over the 4 years was not significant. Regression of grain yield on soil physical properties showed significant effects of BD and Ks on rice yield and that of IR and f on wheat yield. These relationships were used to develop a Soil Physical Quality Index (SPQI) model. Values of SPQI for treatments with grain yields that were statistically equal to maximum yield ranged from 0.70 to 0.80 for rice soils and 0.75 to 1.0 for wheat soils. Overall, tillage and residue treatments did not significantly degrade soil physical quality during the first 4 years, but projections based on the SPQI suggest they could in 5 to 9 years depending on the practices used for soil puddling and residue management. In DSWP, SPQI for rice was significantly lower from the first year itself (which indicates need for tillage) but was in the optimum range for wheat even under zero tillage. The proposed SPQI model has been verified using the published data on rice-wheat system under different soil conditions across the country.
 
 
 
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