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Malik M.A.,Pmas Arid Agriculture University | Khan K.S.,Pmas Arid Agriculture University | Fayyaz-ul-Hassan,Pmas Arid Agriculture University | Umair A.,Soil and Water Conservation Research Station Sohawa
International Journal of Agriculture and Biology | Year: 2014

Knowledge about different phosphorus pools in the soil and their relationship with different soil properties is of immense significance for increasing phosphorus use-efficiency in agricultural systems. Fifteen soil series from the relevant agricultural fields were analysed for their phosphorus pools. The average size of different P pools (% of total P) in the soils was in order of, dHCl-P (63.7%) > cHCl-Pi (14.8%) > residual P (9.4%) > cHCl-Po (3.8%) > NaHCO3-Pi (2.4%) > NaOH-Pi (2.0%) > NaHCO3-Po (1.4%) > resin-P (1.3%) > NaOH-Po (1.2%). Overall, the inorganic P pools comprised of 93.6% of total P in the soils and had highly significant positive correlation with soil pH and CaCO3 content. The organic P constituted a small proportion (6.4%) of the total P and was positively correlated with the clay and organic C contents of the soils. The data indicated that organic P pool represents an important source of P in subtropical alkaline soil ecosystems. © 2014 Friends Science Publishers.

Abid M.,Directorate of Soil and Water Conservation | Ahmed R.,University of Agriculture at Faisalabad | Umair A.,Soil and Water Conservation Research Station Sohawa | Islam M.,National Fertilizer Development Center
Pakistan Journal of Scientific and Industrial Research Series B: Biological Sciences | Year: 2015

Comparative effect of organic and inorganic fertilizer on the growth and yield of maize variety Hicorn-984 was studied at agronomic research area of University of Agriculture, Faisalabad during the year 2005. The trial was laid out according to randomised complete block design in triplicate and plot size was 3 m × 6 m. There were six treatments comprising of various levels of organic and inorganic fertilizer in different combinations and a control. Combined application of organic and inorganic fertilizer differed significantly from control as well as from their sole application. Comparison of treatments showed that inorganic fertilizer application at the rate of 70-50-35 kg NPK/ha along with 5 t/hapoultry manure showed maximum plant growth parameters such as leaf area (1537 cm2), plant height (195 cm), number of grains per cob (452) and thousand grain weight (234 g) which were at par with T5(70-50-35 kg NPK/ha along with 8 t/ha FYM) but significantly higher than the treatments where organic manures and inorganic fertilizers were applied separately. Maximum grain yield (5.7 t/ha) and cost-benefit ratio (1.7) were achieved in the treatment T6(NPK at 70-50-35 kg/ha along with 5 t/ha poultry manure) while, minimum grain yield (2.3 t/ha) and cost benefit ratios (1.1) were recorded in control. Combined application of organic and inorganic fertilizer results in increase in yield and profitability to farmer as compared to their sole application.

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