Mehmet Zengin

The effects of potassium on the yield and fruit quality components of stick tomato

This research was performed to determine the effects of potassium applied on soil to increase dose on the yield and yield components of stick tomato (Lycopersicon esculentum L. var. Şimşek) grown in greenhouse conditions in the Antalya Province in 2010. In this experiment, the Şimşek fresh tomato variety commonly grown in the Mediterranean region was tested with applications of 0, 40, 80, 120, and 160 kg K2O/ha. According to the results, the yield was greatest (195.7 Mt·ha −1) with 120 kg K2O/ha application. The effects of potassium application on tomato yield and yield components were statistically significant (P < 0.01 and P < 0.05). Depending on the application dose, plant stem diameter ranged from 14.22 to 14.99 mm, plant length 173.05 to 181.69 cm, fruit diameter 70.33 to 73.84 mm, fruit number per plant 29.20 to 34.57, fruit weight 160.45 to 185.63 g, penetration resistance 2.45 to 2.99 kg·cm −2, pH 5.10 to 5.20 and sugar content 3.67 to 3.97 ° Brix. In addition, the leaf N/K ratio also affected the tomato yield. Significant correlations were found among the macro and micronutrients of the leaf, yield, and yield components.

EFFECTS OF MANGANESE FERTILIZERS ON YIELD AND YIELD COMPONENTS OF DWARF DRY BEAN

Various manganese fertilizers [manganese sulfate (MnSO4·3H2O (MS), 27% manganese (Mn); and Mn-ethylenediaminetetraacetic acid (EDTA) (ME), 12% Mn] and their doses (0, 6, 9, 12 mg Mn kg−1 and 0, 0.2, 0.3, 0.4%) were applied to soil and sprayed on leaves to study the variations in yield and yield components (plant height, number of pod per plant, number of grain per pod, thousand grains weight, and protein) of dwarf bean (Phaseolus vulgaris L. cv. ‘Akman-98’) grown under Konya (Turkey) ecological conditions during two consecutive growing seasons in 2006 and 2007. Field experiments were conducted in randomized block split plot design with four replications. All soil applications were made on bands as a single application at sowing whereas foliar applications were made in two sprays on the 25th and 35th days after seed emergence. According to the results, foliar application of ME resulted in better yield and yield components than the MS application and all types of soil applications. The highest grain yields were obtained by the 0.2% of ME sprayed on the leaves in the first year (2783.4 kg ha−1) and that of 0.3% of ME also sprayed onto the leaves in the second year (3092.1 kg ha−1).

EFFECTS OF FOLIAR AND SOIL APPLICATIONS OF DIFFERENT MANGANESE FERTILIZERS ON YIELD AND NET RETURN OF BEAN

This study was carried out in order to determine the effect of various manganese fertilizers [manganese sulfate (MnSO4.3H2O) (MS), 27% manganese (Mn) and manganese ethylenediaminetetraacetic acid (Mn-EDTA) (ME), 12% Mn], their doses (0, 6, 9, 12 mg Mn kg−1 for the soil and 0, 0.2, 0.3, 0.4% for the leaf) on yield and net return of dwarf bean. Field experiments were conducted in the randomized blocks split plot design with four replications under Konya ecological conditions in Turkey. Soil applications were made on bands as a single application at sowing whereas foliar applications (FA) were made at two times. Results of the field experiments showed the highest bean yields were significantly obtained by the fertilizer of ME-FA sprayed (243.80 and 257.74 kg da−1). For both years, the lowest yields were obtained by the MS-SA applications (166.97 and 180.60 kg da−1). The maximum net income was US

Response of maize for grain to potassium and magnesium fertilizers in soils with high lime contents

104.16 da−1 and US

Response of sunflower to potassium and magnesium fertilizers in calcerous soils in central Anatolia of Turkey

156.06 da−1 by years.

Mineral contents of some aromatic plants, their growth soils and infusions

ABSTRACT An antagonistic reaction between calcium (Ca) and magnesium (Mg) and potassium (K) may lead to low absorption of K and Mg by plants from soils with high Ca contents even when levels of K and Mg should be adequate. Two separate field studies were carried out in 2009 and 2010 to determine the effects of potassium (0, 40, 80, 120 kg K2O ha−1; as potassium sulfate) and magnesium (0, 20, 40, 60 kg magnesium oxide (MgO)ha−1; as magnesium sulfate) applied to a soil with high lime content either separately or in combinations, on the grain yield and yield components of maize for grain in semi-arid Central Anatolia in Turkey. One dose of the K, Mg-fertilizers was applied during sowing in both years. According to the results, increasing the dosage of K increased yield components more than increases in Mg dosages. Combinations of K and Mg tended to maximize the yield components. Moreover, the greatest plant heights, first ear lengths, grain weights per ear and protein ratios were obtained for the K80Mg40 dose.

Effects of potassium, magnesium, and sulphur containing fertilizers on yield and quality of sugar beets (Beta vulgaris L.)

ABSTRACT This research was carried out to determine the effects of potassium [0, 40, 80, 120 kg potassium oxide (K2O) ha−1] and magnesium (0, 20, 40, 60 kg magnesium oxide (MgO) ha−1) applied into soil separately and together on the grain yield and yield components of sunflower for oil grown in two farmer fields in the semi-arid Central Anatolia in 2009 and 2010. The experiments were set as factorial experiment design in randomized blocks and 4 replicates. Potassium and Mg-fertilizers were used in the single time into base in the sowing. According to the results, K application in the increasing doses increased yield components more than that of Mg. Together giving of the K and Mg in certain combinations took the yield components to maximum levels. The highest grain yields were obtained by the K40Mg40 in the first year (7313 kg ha−1) and by the Mg60 in the second year (6510 kg ha−1).