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Articles by A.M. Ranjha
Total Records ( 3 ) for A.M. Ranjha
  A.M. Ranjha , M. Akram , S.M. Mehdi , M. Sadiq , M. Sarfraz and G. Hassan
  A total of 100 soil and 75 plant samples were collected for determination of nutritional status of citrus orchards in Sahiwal. The results showed that 8% soil samples were deficient in N, 4% in P, no one in K, 100% in Zn and no one in Cu, Fe and Mn. The extent of nutrients belonging to low category has been found as 88% in N, 56% in P, no one in K, 84% in Cu and no one in Fe and Mn. In sufficiency range, 4% soil samples were sufficient in N, 24% in P, 64% in K, 16% in Cu and 100% in Fe and Mn contents. Among high range of nutrients only 16% soil samples in P and 35% in K were found. In case of leaf samples, 40% were deficient in N, 28% in Zn, no one in P, K, Fe, Cu and Mn while 24% were low in N, 60% in K, 68% in Zn and no one in P, Cu, Fe and Mn and 32% were sufficient in N, 68% in P, 40% in K, 4% in Zn, 100% in Cu, Fe and Mn contents while 4% were high in N and 32% in P. Soil pH had a non significant negative correlation with leaf N, P, K, Zn, Fe and Mn and nonsignificant positive correlation with Cu. Soil organic matter had a highly significant positive correlation with leaf N and nonsignificant negative correlation with K, Cu and Mn and non significant positive correlation with P, Ca+Mg, Zn and Fe contents. Clay contents had a significant positive correlation with K and non-significant positive correlation with P, Ca+Mg, Zn and negative correlation with N, Cu, Fe and Mn but non significantly. A positive significant correlation was also found between soil N, Ca+Mg, Fe content and leaf N, Ca+Mg and soil P, K, Zn and Mn also had positive correlation with leaf P, K, Zn and Mn but non significantly. Soil Cu had negative correlation with leaf Cu but non-significantly.
  K.H. Awan , A.M. Ranjha , S.M. Mehdi , M. Sarfraz and G.Hassan
  The present study was carried out to observe the effect of applying N, P and K fertilizers at different rates and combinations on growth and yield of rice line PB-95. The fertilizer treatments comprised the T1 (control), T2 (0-75-75), T3 (60-75-75), T4(120-75-75), T5 (180-75-75), T6 (120-0-75), T7 (120-500-75), T8 (120-100-75), T9 (120-75-0), T10 ((120-75-50) and T11 (120-75-100) NPK kg ha-1. The results showed that application of NPK significantly increased the crop yield and maximum paddy and straw yield were obtained from plot fertilized @ 120-100-75 NPK kg ha-1. Harvest Index was highest at control, N physiological efficiency index and N fertilizer efficiency decreased with increasing N levels. Similarly, P physiological efficiency index decreased while P fertilizer efficiency increased with increasing P levels.
  E.H. Chaudhary , A.M. Ranjha , S.M. Mehdi , M.A. Zaka and M. Sarfraz
  This study was conducted with the objective to improve the P fertilizer recommendation system by selecting procedure take care of initial P status of soil and P fixation tendencies. For this purpose, phosphorus fixation tendencies of six soils were ascertained by using P recovery after two hours and its P application. Initial recommendation was estimated based on fixation tendency and it was correlated with P fertilizer recommendation on eight weeks soil equilibration pot study. Regression equations relating fixation tendencies and eight weeks equilibration results were used to predict P requirement associated with maximum maize yield. The degree of association was high enough (r2 =0.98) between two sets of data obtained independently. The procedure is competent to be followed in routine fertilizer recommendations, as it is rapid, takes care of fixation tendency, initial soil status and permits values analogous to actual values achieved by eight weeks equilibration period.
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