This work aimed to study the effect of interaction between four N rates (100%, 75%, 50% and 25% of recommended dose) and spraying with three rates of Mg (0, 1%, and 2%) on Jerusalem artichoke plants growth, tuber chemical analysis and tuber yield under sandy soil conditions. The results indicated that application of 100% or 75% of recommended N were the best treatments for increasing plant growth, most of tuber chemical analysis parameters, and tuber yield / plant as well as per feddan. Spraying with Mg increased all studied parameters compared to control treatment. On the other hand, the best interaction treatments for increasing plant growth, tuber chemical analysis and tuber yield were application of 100% N + spraying with 1% or 2% Mg and application of 75% N+ spraying with 1% Mg approximately.

Growth of table beet plant cv. " Detroit Suprence " , yield, betanin content and TSS in root top were studied due to application of Mg (0.75%, 1.5 %), Cu (15, 30 ppm), and B (30, 60 ppm) as foliar spray through two field experiments were carried out during the winter seasons of 2011-2012 and 2012-2013 at The Experimental Farm of Environ. Agric. Sci. Fac., Arish Univ., North Sinai. The results revealed that higher relative increment in leaf area was achieved by application of Mg at 1.5 % as foliar spray which increased by 90.6 % and 73.0 % in the 1 st and 2 nd seasons, respectively in comparison with control. Total fresh weight of plant was increased with application of B at 60 ppm in both seasons with relative increments of 47.55% and 43.65 % over the control treatment in 1 st and 2 nd seasons, respectively. Higher total dry weight per plant was recorded with foliar application of B at 30 ppm in the 1 st season, Cu at 15 ppm and B at 60 ppm in the 2 nd season. The relative increments in dry weight of plant were 43.45 %, 39.95 %, and 39.10 % over the control for spraying with B at 30 ppm in the 1 st season, Cu at 15 ppm and B at 60 ppm in the 2 nd season, respectively. Spraying with Cu at 15 ppm and Mg at both concentrations (0.75, 1.5%) achieved the highest contents of chl. a, b and chl. a+b compared to the control treatment. The highest relative yield/fed. was recorded with application of B at a concentration of 60 ppm where it was increased by 38.7 and 42.4% , in the 1 st and 2 nd seasons, respectively over the control. The content of betanin pigment in cortex increased as a result of spraying with Mg (1.5 %), B (30, 6. Ppm) and Cu (15 ppm), while it increased in core zone due to spray with Mg (0.75 %), Cu (15 ppm) and B(60 ppm) particularly in the 2 nd season. The concentration of the pigment in the core zone was lower than in the cortex zone.

The experiment aimed to study the effect of spraying tomato plants (Solanum lycopersicum) GS 12 cv. with different calcium sources (calcium chloride, calcium carbonate and calcium chelate as well as without calcium) at different times of application, viz, T 1 : spraying one time at full blooming, T 2 : spraying one time after 15 days from T 1 , and T 3 : spraying two times at T 1 + T 2 on marketable yield, unmarketable yield (expressed as fruits infected by blossom end rot (BER)), and quality of fruits after 10 days of beginning the storage period. Plants were grown under low tunnels. Spraying tomato plants with Ca + as CaCl 2 or CaCO 3 and other Ca sources increased the marketable yield/ fed. , and also increased fruit shelf life period expressed as decreasing in fruit weight loss and increasing fruit firmness. Foliar application of CaCl 2 recorded the lowest values of lycopene contents in both seasons. Time of calcium application did not reflect any significant effect on both marketable and nonmarketable yield as well as marketability (%) and BER incidence (%), and almost pH and TSS values. Application of T3 increased the fruit contents of vitamin C (V.C), while using T2 decreased the content of lycopene. All interaction treatments with control (without application of calcium) decreased marketable yield, marketability (%), but it increased unmarketable yield, BER incidence (%), fruit weight loss and TSS in the 2 nd season. Therfore, spraying tomato plants grown under low tunnels in calcareous soil with Ca in different sources had positive effects on both marketable yield and blossom-end rot incidence, total yield, marketability%, BER% and on fruit quality after 10 days of storage period compared to control.