Mehdi S.M.,Soil Fertility Research Institute |
Sarfraz M.,Soil Salinity Research Institute |
Ilyas M.,Soil Salinity Research Institute |
Amjad Qureshi M.,Agri Biotech Research Institute |
Zaka M.A.,Citrus Research Institute
International Journal of Agriculture and Biology | Year: 2015
Salt affected soils are characterized by high soil pH, excessive salts on the surface/in the rhizopshere and nutrition imbalance resulting in reduced crop productivity. Addition of organic amendments improves the physical condition and ultimately the crop growth. Field experiments were performed to assess the integrated nutrient management in moderately salt affected soil conditions using P-fixation capacity of soils in rice-wheat cropping system. Suitable site was selected to follow the rice-wheat rotation in permanent layout. Municipal solid waste compost (MSWC) was used as an organic source. Results revealed that combined application of MSWC with mineral fertilizer i.e., site specific use of mineral fertilizer with MSWC and integrated use of chemical fertilizers with MSWC in 80:20 ratio enhanced paddy/grain yield and improved the fertility status of the soil. The site specific integrated use of chemical fertilizer with MSWC in 80:20 ratio produced the highest biomass/paddy/wheat grain yield i.e., 8.48/2.55 and 5.43/2.58 Mg ha-1, respectively. Soil analysis was carried out before transplanting/sowing and after harvest of each crop. The pHs, ECe and SAR slightly reduced as compared to the initial values and this trend continued subsequently. Soil available P, organic matter, extractable K and Zn was enhanced especially in the site specific integrated use of chemical fertilizer with MSWC in 80:20 ratio. Minor increase in Co, Cu and Pb was observed with the application of MSWC in the treatments with integrated use of chemical fertilizers and site specific integrated use of chemical fertilizers with MSWC in 80:20 ratio. © 2015 Friends Science Publishers.
Yunas M.,Soil and Water Testing Laboratory for Research |
Yousaf M.,Pmas Arid Agriculture University |
Khalid R.,Soil Fertility Research Institute |
Nawaz S.,Soil and Water Testing Laboratory for Research
Soil and Environment | Year: 2010
The effect of S application on soil sulfur (SO4-S) contents was investigated in different textured soils. The samples from eight soil series viz. Missa, Rajar, Qutbal, Guliana, Tirnaul, Rawal, Rawalpindi and Qazian of Pothwar area were collected and analyzed for physico chemical characteristics. Only two soil series i.e. Missa and Rajar had satisfactory (11-30 mg kg-1) S contents at upper soil depth while the rest were deficient (<10 mg kg-1) in sulphur. The highest SO4-S content (15.2 mg kg-1) was recorded in Missa soil, bearing clay loam, while lowest (5.4 mg kg-1) in Qazian soil bearing loamy sand soil texture at upper (0-15 cm) soil depths. The three soils deficient in SO4-S viz. Guliana, Rawal, Qazian, were selected for a pot experiment. Sulfur was applied @ 0, 5 and 15 kg S ha-1 using gypsum and ammonium sulphate (AS) as sources. The highest biomass (14090 kg ha-1) was observed with AS @ 15 kg S ha-1 application. The post harvest soil analysis revealed that the S application significantly increased soil SO4-S contents; the highest 9.49 mg kg-1 was observed where gypsum @ 30 kg S ha-1 was applied. The application of gypsum and AS @ 30 kg S ha-1 increased SO4-S contents by 8.5 and 7.60 % over control, respectively. The highest mean SO4-S contents (6.40 mg kg-1) were observed in Guliana soil having silt loam texture while lowest (4.64 mg kg-1) in Qazian soil. The results concluded that well drained, light textured soils in high rainfall areas have low SO4-S content and require S fertilization for optimum crop production. © 2010, Soil Science Society of Pakistan.
Lone M.I.,Pmas Arid Agriculture University |
Ullah R.,Soil Fertility Research Institute
Life Science Journal | Year: 2012
Wheat (Triticum aestivum L.) was grown in earthen pots containing soil of Balkasar Soil Series (Sandy Loam) in green house at the Department of Soil Science and SWC, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi during Rabi season, 2007. The Crop was treated with two levels of Phosphorus (40 and 80 kg P ha-1) in the form of SSP, TSP, NP and DAP. A basal doze of 100 kg N and 60 kg K ha-1 was applied as urea and murate of potash (MOP) respectively. Chemical composition of wheat plants showed that all the parameters were significantly improved by addition of P except the Phosphorus concentration (%) in wheat straw and potassium conc. (%) in wheat grain. Similarly Phosphorus uptake was increased with the increased level of phosphorus application. It was concluded from the study that different sources and levels of phosphorus has significant effect on the NPK contents of wheat and total P uptake by wheat plants. Among all the sources and levels of phosphorus, 80kg P ha-1 as single superphosphate (SSP) showed superiority over triple superphosphate (TSP), nitrophos (NP) and diammonium phosphate (DAP) on phosphorus deficient soil of Balkasr area of Tehsil Chakwal.
Khan M.S.A.,Soil and Water Testing Laboratory for Research |
Qazi M.A.,Soil and Water Testing Laboratory for Research |
Mian S.M.,Soil Fertility Research Institute |
Ahmed N.,Soil and Water Testing Laboratory for Research |
And 3 more authors.
Journal of the Chemical Society of Pakistan | Year: 2013
Different analytical procedures are being employed in the world to quantify the chelated portion in a Zn-EDTA fertilizer. Agriculture Department, Government of the Punjab is following Shahid́s analytical method in this regard. This method is based on Ion-chromatography (IC) that separates the mineral zinc (Zn) from an adulterated Zn-EDTA fertilizer sample i.e. mixture of mineral and chelated Zn fractions. To find out its effectiveness and suitability, this comparative study was carried out by analyzing adulterated, non-adulterated Zn-EDTA standard and Zn-EDTA samples taken from market in thrice following three methods namely Shahid́s (IC) analytical method, Atomic Absorption Spectrophotometric (AAS) method based on the principle of precipitating the mineral Zn fraction at high pH value by using alkali solution of suitable concentration and analysis of filtrate containing only chelated fraction and Association of Official Analytical Chemists (AOAC) method FM-841 respectively. Adulterated Zn-EDTA samples were prepared by mixing of known quantity of mineral Zn with chelated Zn-EDTA standard. The results showed that Shahid́s analytical method and AAS method, both successfully estimated the chelated fraction. The AOAC FM-841 method was insensitive to put a ceiling on the mineral fraction hence did not furnish the reliable results. The Shahid́s analytical method was selected being equally effective to produce reliable results both for solid and liquid Zn-EDTA samples. The AAS method was comparable in only liquid samples.
Khalid R.,Soil Fertility Research Institute |
Mahmood T.,Soil and Water Testing Laboratory |
Bibi R.,Soil and Water Testing Laboratory |
Siddique M.T.,AridAgriculture University |
And 2 more authors.
Soil and Environment | Year: 2012
Soil characteristics of Chakwal district were evaluated through physical and chemical analyses. Representative soil samples received/collected from farmers fields were analyzed for texture, electrical conductivity (EC), pH, organic matter (SOM), available phosphorus (P) and potassium (K) contents. Texture of the soils varied from sandy loam to loam. About 97% soils had EC values within the normal range (< 4 dS m-1). The pH values of 64% soils ranged from 7.0 to 8.7 with an average of 7.9 and 6% soils had pH > 8.5. About 86% soils were poor in SOM and P, only 11% samples had satisfactory level of SOM (> 0.86%) and P (>7.0 mg kg-1) contents. The K status of most of soils (68%) was in satisfactory range. The frequency distribution indicated that most of the soils of Chakwal had SOM content in the range of 0.4-0.6%, P in the range of 2.1-4.0 and K in the range of 81-120 mgkg-1. The nutrient index values of Chakwal soils in respect of SOM and P were poor, whereas satisfactory for potassium. © 2012, Soil Science Society of Pakistan.