Experimental site for both wheat and mungbean The study was carried out in Rabi (Winter) and Kharif-1 (Summer) seasons of 2007-2008 in the research field of Wheat Research Centre, Bangladesh Agricultural Research Institute (BARI) Nashipur, Dinajpur, Bangladesh. The Agro Ecological Zone (AEZ) of the area is Old Himalayan Piedmont Plain (AEZ-1) (FAO/UNDP, 1988). The geographical position of the area is between 25°62´ N, 88°63´ E and 38.20 meter above sea level. The soil of the experimental plot was sandy loan and reaction is acidic. The experimental site was covering about 21% wheat areas of the country, for suitable weather (comparatively cooler and longer winter) (Bodruzzaman, et al., 2005). Experimental procedures for wheat The experiment was laid out in Randomized Complete Block Design with 3 replications. For wheat treatments were- (I) recommended fertilizer + Mg + B, (II) recommended fertilizer + lime + B + Mg, (III) recommended fertilizer + lime + Mg, (IV) recommended fertilizer + lime + B and (V) control (Only recommended fertilizer). Unit plot size was 5×4 m. For liming, CaCO3 was applied in treatment wise at the rate of 2 t ha–1 and irrigation was done immediately after application. Mg and B were applied treatment wise at the rate of 10 and 1 kg ha–1, respectively. For wheat experiment variety Prodip (BARI Gom-24) was used. Seed was treated with Provax-200 WP an effective seed treating fungicide, consisting of Carboxin and Thiramon. Sowing was done on 04 December 2007 in lines 20 cm apart at a seed rate of 140 kg ha–1. Recommended fertilizer dose for wheat was 120- 35-50-20-4 kg ha–1 N-P-K-S-Zn. Two-third of N and full amount of other fertilizers were applied as basal during final land preparation. Rest 1/3 of N fertilizer was applied after first irrigation on 21 days after sowing (DAS). Second and third irrigation were given at booting (47 DAS) and grain filling (78 DAS) stage. Weeds were controlled by spraying 2, 4-D Amine on 30 DAS. Other intercultural operations were done properly. The crop was harvested plot-wise at full maturity. Plots were harvested for wheat 3m long middle 19 rows (3×4m), for avoiding boarder effect. The sample plants were harvested separately. The harvested crop of each plot was bundled separately, tagged and taken to threshing floor. The bundles were thoroughly dried in bright sunshine, weighed and threshed respectively. Data on wheat experiment Data on plants m–2 (no.), tillers m–2 (no.), spikes m–2 (no.), plant height at maturity (cm), spike length (cm), Spikelets spike–1 (no.), grains spike–1 (no.), 1000-grain weight (g), straw yield (t ha–1), grain yield (t ha–1) and harvest index (%)were recorded. Grain yield was adjusted to 12% moisture. The harvest index (%) was calculated according to the following formula. Harvest index (%) = Grain yield / Biological yield (grain yield + straw yield) ×100 Experimental procedures for mungbean After harvested of wheat mungbean was grown in the same plots. Treatments for mungbean experiment were- (I) recommended fertilizer + Mg + B, (II) 75% of recommended dose, (III) recommended fertilizer + B, (IV) recommended fertilizer + Mg and (V) control (without fertilizers). According to the research finding (Fatell et al., 2007), it was assumed that the effect of liming would continue at least for the next crop. For this reason liming was not done before mungbean. The recommended dose of fertilizers for mungbean as 20-20-30-10-4 kg ha–1 N-P-K-SZn. Mg and B were applied treatment wise at the same rate for wheat. All the fertilizers were applied as basal during final land preparation. Variety BARI Mug-6 was sown on 11 April 2008 at a seed rate of 30 kg ha–1 in lines 30 cm apart. The light irrigation was done just after sowing. Thinning was done on 11 DAS. Weeding was done 24 DAS. Insecticide was applied 2 times. Other intercultural operation was done when necessary. Crop was harvested at full maturity. Data on mungbean Data on plants m–2 (no.), plant height at harvest (cm), Fresh weight of plants m–2 (g), pods plant−1 (no.), pod length (cm), seeds pods−1 (no.), 1000- grain weight (g), biological yield (t ha–1) and grain yield (t ha–1) were recorded. Data on soil Soil pH was measured immediately before liming, and 56 and 70 Days after liming (i.e. 42 and 56 DAS). Soil pH was measured in a 1:2 soil/water using glass electrode pH meter. Organic carbon was determined by Walkley and Black oxidation method (Walkley and Black, 1934), total N was determined by micro Kjeldhal method (Jackson, 1958). Ca and Mg were determined by extractable method (Hunter, 1972), P, K, S and Zn were determined by modified Hunter’s methods (BARC, 1984) B was determined colorimetrically by the AzomethineH method (Sippola and Ervio, 1977). Data analysis Data were complied and subjected to statistical analysis. Analysis of variance (ANOVA) was done and means separation was done according to Duncan’s New Multiple Range Test (Gomez and Gomez, 1984).