Phosphorus (P) is the second most important crop nutrient after nitrogen that increases productivity and profitability of maize (Zea mays L.) on P deficient soils in Northwest Pakistan. The objective of this study was to find the best level and time of P application for higher maize (cv. Azam) productivity and profitability. Field experiment was conducted at the Research Farm of Khyber Pakhtunkhwa Agricultural University, Peshawar during summer 2005, comprising of six P application timings [40, 30, 20 and 10 days before sowing (DBS), at sowing and 15 days after sowing (DAS)] as main plots, and three P levels (30, 60 and 90 kg P ha-1) as subplots. The highest level of P enhanced phenological development, and increased ear length, number of rows and grains ear-1, grain weight, economic yield, shelling percentage, and net returns. Application of P at 10 DBS had marked increase in ear length, grain weight, grain yield, shelling percentage and net returns; while plots that received P at sowing time produced the highest number of rows and grains ear-1. There was no much difference in the net returns when P was applied at 10 DBS (22, 560 PKR ha-1) or at sowing (21, 883 PKR ha-1). It could be concluded from the study that application of 90 kg P ha-1 either at 10 DBS or at sowing time is necessary for profitable maize production in the study area.
Amanullah, -., Zakirullah, M., & Khalil, S. (2012). Timing and Rate of Phosphorus Application Influence Maize Phenology, Yield and Profitability in Northwest Pakistan. International Journal of Plant Production, 4(4), 281-292. doi: 10.22069/ijpp.2012.711
MLA
- Amanullah; M. Zakirullah; S.K. Khalil. "Timing and Rate of Phosphorus Application Influence Maize Phenology, Yield and Profitability in Northwest Pakistan", International Journal of Plant Production, 4, 4, 2012, 281-292. doi: 10.22069/ijpp.2012.711
HARVARD
Amanullah, -., Zakirullah, M., Khalil, S. (2012). 'Timing and Rate of Phosphorus Application Influence Maize Phenology, Yield and Profitability in Northwest Pakistan', International Journal of Plant Production, 4(4), pp. 281-292. doi: 10.22069/ijpp.2012.711
VANCOUVER
Amanullah, -., Zakirullah, M., Khalil, S. Timing and Rate of Phosphorus Application Influence Maize Phenology, Yield and Profitability in Northwest Pakistan. International Journal of Plant Production, 2012; 4(4): 281-292. doi: 10.22069/ijpp.2012.711