The present work was carried out in Private Vegetable Farm at El-Heez, Al-Wahaat Al-Baharyia District, Giza Governorate, Egypt, during two successive summer seasons of 2016 and 2017, to study the effect of plant spacing and apical shoot pinching (ASP) stage on growth and productivity of watermelon plants under sandy soil conditions using drip irrigation system. Results showed that, the interaction between plant spacing at 30 cm and ASP at the 6 th node gave the tallest plants, whereas the interaction between plant spacing at 60 cm and ASP at the 6 th node gave the highest values for each of number of leaves and branches/plant at 45 days after planting. On the other side, planting watermelon at 45 cm and ASP at the 6 th node increased average number of fruits/ plant, average fruit weight, yield/plant and total yield/faddan.

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A field experiment was carried out during the two successive winter seasons of 2014/2015 and 2015/2016 at a private farm in El-Tour region, South Sinai Governorate, Egypt, to study the effect of planting dates, nitrogen sources and their interactions on dry weight, yield and its components and nitrogen use efficiency (NUE) of garlic (Balady cultivar) grown in sandy soil conditions using drip irrigation system. The obtained results could be summarized as follows: The interaction between planting dates on 15 th Oct. or 1 st Nov. and fertilizing plants with 100% of the recommended rate (RR) of N as poultry manure (PM) or and 50% RR of N as ammonium sulphate (AS)+50% RR of N as PM gave the highest values of each of dry weight of bulbs, leaves, and total dry weight/plant at 135 days after planting (DAP), N and P uptake by bulbs and leaves and total uptake of them by plant, yield of grades 1,2, exportable, marketable, total yield, average bulb weight and the highest values of nitrogen use efficiency (NUE). Whereas, the interaction between planting on 15 th Oct. and fertilizing plants with 50% RR of N as AS + 50% RR of N as PM gave the highest values of K uptake by bulbs and leaves as well as K total uptake by plant.

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This work was carried out during the two successive summer seasons of 2016 and 2017 in a Private Farm, Dondet Village, Meet Ghamr District, Dakhlia Governorate, Egypt to study the effect of various sources of nitrogen fertilization which equal 60 kg N/fad., on growth, yield and pod quality of snap bean cultivars (Paulista and Bronco) grown in clay soil under flood irrigation. The results showed that, fertilizing Paulista cultivar with 30 kg N as organic nitrogen (ON) + 30 kg N as MN/fad., (ammonium sulphate) + Nr (nitrobein) increased dry weight of leaves, branches and shoot dry weight/ plant, chlorophyll a, b, total (a+b) in leaves tissues, total yield/fad., and average number of pods/ plant as well as total carbohydrates and total protein in green pods in both seasons. Whereas, the interaction between fertilizing of Bronco cultivar with 20 kg N as ON+40 kg N as MN/fad.,+Nr increased average pod weight and total fibers in green pods in both seasons.