Effect of Compost Additives and Application Time of Phosphorus in different Methods on Growth, Productivity and Quality of Peanut in Sandy Soils

There are many factors playing major role in use efficiency of phosphatic fertilizers, which varies ‎from soil to another. Therefore, this study aims mainly to evaluate the effect of some trails i.e. ‎compost additives and P application times in different methods in sandy soil as well as its effect ‎on growth, productivity and quality of peanut (Arachis hypogaea L.). This study was carried out ‎as field experiment in sandy soil at South Al-Tahrir Sector, Al-Behaira Governorate, Egypt ‎during two successive growing summer seasons. The experiment was laid out in a split plot ‎design with three replicates. Four rates of compost i.e. (C1) 0, (C2) 4.76 (C3) 9.52 and (C4) ‎‎14.28 ton ha-1 were arranged in the main plots, while the four treatments of phosphorus were ‎randomly distributed in the sub plots.‎With all the studied treatments of compost and P, the studied growth parameters i.e. ‎plant height (cm), number of branches per plant, and dry matter weights of straw and leaves were ‎higher in the second growth season than those of first one. Data obtained from our experiments ‎showed that growth parameters increased significantly with the increasing rates of compost ‎application as well as with P applications in three doses (P4). Foliar application of P at 70-80 ‎days of planting (P3) resulted in more increases in the determined growth parameters than those ‎found with other treatments. Similar effect was found with peanut yields of pods and seeds and ‎seeds contents of N, P and K as well as its content of protein and oil. ‎