Section 3 (Crop Management)

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Seed priming with maize Table 1. Trials on seed priming in maize in North West Frontier Province, Pakistan, 1998-2001. Year Site Variety Soaking time (h) 1998 Res. Station Peshawar 1998 Res. Station Peshawar 1998 Res. Station Peshawar 1998 Farmer Field Mardan 1998 Farmer Field Mardan 1999 Res. Station Peshawar 1999 Res. Station Peshawar 1999 Farmer Field a Nowshera 1999 Farmer Field a Nowshera 1999 Glasshouse Peshawar 2000 Farmer Field Sheikh Kali 2001 Res. Station Peshawar No. of block s Yield (Not Prime d) % increas e Dehquan 0, 16 4 2210 6 ns Dehquan, Sarhad White 0, 16 3 4223 32 * Sarhad White 0, 16 4 3150 7 ns Azam 0, 16 4 5844 17 * Azam 0, 16 4 6288 23 * Azam 0, 18 4 3562 20 * Local, Azam 0, 18 3 1808 48 * Azam 0, 16 4 1075 46 ns Azam 0, 16 4 1117 29 ** Azam 0, 18 4 3360 18 ** Kisan-90 0, 18 4 2900 47 ** Azam 0, 16 3 2801 17 * 2000 Res. Station Kisan-90 0, 8, 12, b Peshawar 16 2000 Res. Station Kisan-90 0, 12, 16, b Peshawar 20 a a Notes: irrigated using saline tubewell water. b increase calculated as mean of all priming durations tested. *P>0.05, **P>0.01, ***P>0.001, ns not significant. - 320 - Sig. 4 2584 76 *** 6 1875 65 ***
Table 2. Effect of priming duration on grain yield of maize cv.Kisan-90 in Pakistan, 2000. Least significant difference = 520 kg ha -1 . Values followed by the same letter do not differ at P>0.05. Priming duration (hours) Grain yield (kg ha -1 ) 0 2584a 8 3555b 12 4083b 16 6042c Table 3. Effect of priming duration on grain yield of maize cv.Kisan-90 in Pakistan, 2000. Least significant difference = 300 kg ha -1 . Values followed by the same letter do not differ at P>0.05. Increase in yield (%) 140 120 100 Priming duration (hours) Grain yield (kg ha -1 ) 0 1875a 12 2542b 16 3649d 20 3104c 80 60 40 20 0 1 3 5 7 9 1113151719212325272931 Farmer number - 321 - Harris et al. Figure 1. Yield of maize in 32 farmers’ paired-plot trials in NWFP, Pakistan. Data were pooled from 1999 (11 farmers), 2000 (15 farmers) and 2001 (6 farmers) and are ordered by the yield of the non-primed plot (light bars) in each trial. Overall mean yield (non-primed) = 1.23 t ha -1 ; overall mean yield (primed) = 1.71 t ha -1 .
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Section 3 (Crop Management)

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