Response of “Kalllmata” Olive Cultivar to The Foliar Application of Moringa Extract, Boron, and Zinc

Abstract

ZnSO4 on vegetative growth, fruit yield, oil yield and fruit quality of ten-year-old olive (Olea europaea) cv. Kalamata. The trees were planted at a distance of 6 × 5 m in sandy soil under a drip irrigation system. Sixty-five uniform trees of the same growth and size were randomly chosen, arranged in a randomized complete block design (RCBD), and subjected to the same applied agricultural practices in the field during the three seasons. The trees were sprayed three times i.e., at the start of the season (April), at full bloom (mid of May) and three weeks later by the following treatments Control, Moringa Leaf Aqueous (MLAE) at 2000, 4000, and 6000 ppm. The results showed that the foliar application of moringa, zinc and boron solely or in combination improved greatly the leaf chlorophyll content, the number of flowers per m 2 , fruit set % and the leaf content from nitrogen, phosphorous, potassium, zinc and boron and the most obvious effect was noticed with the spraying of combination 3 or combination 2 over control or the rest applied treatments in both experimental seasons. Additionally, it was clear from the shown data that moringa at 6000 or 4000 ppm, and zinc sulfate at 1000 were more effective in improving the same measured parameters over the rest applied treatments in both experimental seasons. The influence of 1000 ppm from zinc or born in olive trees was higher than the effect of 500 or 250 ppm from these elements during study seasons.

Effect of Spraying with Moringa Leaf Extract and Potassium Silicate on some Chemical Properties of Banana Plant MUSA spp.

“…The reason for the superiority of treatment a3 is attributed to the increase in the concentration of Moringa extract and the elements it contains, including nitrogen and magnesium, which are directly involved in the composition of the chlorophyll molecule. This agrees with [12], for olive trees.…”

Synergistic effect of seaweed extract and boric acid and/or calcium chloride on productivity and physico-chemical properties of Valencia orange

“…Similar results were obtained by Ibrahim & Al-Wasfy (2014) , who reported that exogenously applying 0.05% boric acid on Valencia orange trees significantly improved the leaf area and the leaf contents of chlorophyll a, chlorophyll b, total carotenoids, total chlorophylls, nitrogen, phosphorous, potassium, and magnesium compared to the control treatment. Similarly, Harhash, Nasr Alla & Mosa (2022) showed that the foliar application of boron on Kallamata olive trees was extremely effective in enhancing the nutritional status of the trees, greatly improving the leaf chlorophyll content and the leaf content of potassium, phosphorous, nitrogen, zinc and boron.…”

Role of Spraying by Moringa Leaf, Garlic, and Turmeric Extracts in Pomegranate Leaves Mineral Content

“…Our results agreed with those of [40] who found that foliar application with M. oleifera of olive trees raised the N, P, and K in leaves content. Harhash et al [41] indicated that the foliar spraying with moringa extracts on "Kalamata" olive trees raised the content of N, P, K, Zn, and B in the leaves. Also, Abd El-Hamied and El-Amary [9] explained that moringa leaf extract, when sprayed on pear trees of the cultivar Le-Conte at rates of 2 and 4%, increased the visible mineral content of the leaves, particularly in the areas of nitrogen, phosphorus, and potassium.…”