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The aim of this study was to determine the fertility status of Hakkari-Cukurca soils by means of soil analysis. In this survey study, 25 soil samples representing the region were taken. On the soils, pH, EC, CaCO3, texture and organic matter and available nutrient analyses were done. According to results, it was seen that 32 % of the soil is clayey, 48 % of the soil is clayey-loamy, 12 % of the soil is loamy and 8 % of the soil is sandy-clayey-loamy. All of the soils are slightly alkaline and 56 % of the soil have moderate, 36 of soil have high and 8 %of the soil have moderate to high lime content. While there is no salt at 36 percent of the soil, 64 % of the soil contains little salt. Eight percent of the soil contains very little organic matter, 40 % of the soil contains little, 44% of the soil contains moderate and 8% of the soil contains sufficient organic matter. 28% of the soil is sufficient, 64% of the soil is high and 8% of the soil is very high in terms of nitrogen. If an evaluation was made in terms of available nutrient concentrations, it was seen that 16% of the soil had lower, 56% of the soil had sufficient and 28% of the soil had high P. 52% of the soil contained sufficient, 4% of the soil contained lower amount, 36% of the soil contained high and 8% of the soil contained very high amount K. For available Ca, 48% of the samples is low, 52% of is enough. While 4% of the soils contained very little Mg, 96% of the soil contained little amount of Mg. According to micronutrient results, it was seen that 84% of the soil is poor for Fe, 52% of the soils is poor for Mn, 44% of the soil is poor for Zn and 4% of the soil is poor in terms of Cu., Araştırmada, Hakkâri-Çukurca yöresi tarım topraklarının verimlilik durumlarının toprak analizleriyle belirlenmesi amaçlanmıştır. Bu amaçla yöreyi temsilen alınan 25 toprak örneğinde pH, EC, CaCO3, bünye, organik madde ve bitkiye yarayışlı besin elementi analizleri yapılmıştır. Elde edilen bulgulara göre, araştırma alanı topraklarının %32’sinin killi, %48’inin killi tınlı, %12’si tınlı %8’i kumlu-killi- tınlı bünyeye sahip olduğu, toprakların tamamının hafif alkali reaksiyonlu,%56’sının orta kireçli, %36’sının fazla kireçli, %8’inin çok fazla kireçli olduğu belirlenmiştir. Toprakların %36’sı tuzsuz, %64’ü az tuzludur. Toprak organik maddesi bakımından %8’i çok az, %40’ı az, %44’ü orta, %8’i iyi sınıfındadır. Toprakların %16’sının P yönünden az, %56’sının yeterli ve %28’inin fazla düzeyde olduğu; %52’sinin K içeriklerinin yeterli, %4’ünün az, %36’sının fazla, %8’inin çok fazla düzeyde olduğu belirlenmiştir. Örneklerin %48’inde alınabilir Ca az olup %52’sinde yeterli, %4’ünde Mg içeriği çok az, %96’sında ise az düzeyde bulunduğu tespit edilmiştir. Mikro element konsantrasyonları açısından bir değerlendirme yapıldığında toprakların %84’ünün Fe, % 52’ sinin Mn, %44’ ünün Zn % 4’ünün de Cu bakımından fakir olduğu belirlenmiştir.

This research was conducted to determine the effect of nitrogen fertilization on the yield, yield components and nutrient concentrations of lavandin (Lavandula×intermedia Emeric ex Loisel. var. Super A). Experiment was designed as randomized block design with three replications. Nitrogen fertilization increased yields and some quality parameters such as plant height, branch height, length of flower, essential oil content and affected essential oil components (such as: linalool, linalyl acetate and camphor). Nitrogen fertilization also led to increase nutrient concentrations, generally. Results obtained from two years of the study showed that the most effective level of N on lavandin yielding and plant nutrient concentrations appeared to be 100 kg n ha-1.

This study investigated the effect of high humic substance (HS) levels (0, 500, 1000, and 2000 mg HS kg−1) on growth and nutrient concentrations of corn grown on calcareous soils. For these, soil samples were collected from the six different provinces of Turkey. According to the average values, HS levels had no significant effect alone on dry weight, nitrogen (N), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), zinc (Zn), copper (Cu), and manganese (Mn) concentrations. Soil differences significantly affected dry weight, N, Mg, and Cu concentrations (p ≤ 0.05). Looking at HSxsoil interactions on K, Ca, Fe, and Mn concentrations, it could be seen that there was no effect or that the effect was negative. Only plant Fe concentrations obtained from Konya and Urfa provinces were positively affected from HSxsoil interaction. It was concluded that high level of HS had no or negative effect on corn growth and some nutrient concentration under calcareous conditions.

In this study, the effects of foliar application of dilueted acid ( 0.1 % of H2SO4 ) on dry matter, total and available Fe, total N and chlorophyll content of tomato plants grown with different nitrogen sources were investigated and the possibility of recovery in Fe-deficient plants by spraying the foliars with H2SO4 without the necessisity of Fe- fertilization was aimed. Diluted acid applied to foliars twice with a week interval. The highest dry matter was obtained in the plants grown with ammonium application, while the highest total N content was determined in urea-fed plants. Foliar acid application caused to increase both dry matter and total N content significantly. Total and available Fe increased by foliar acid application in the plants grown with urea and nitrate, however these increments were not statistically significant. Total Fe was negatively affected by foliar acid application in the plants grown with ammonium. Foliar acid application didn't affect chlorophyll content of the plants grown with urea, however significantly increased those of the plants grown with nitrate and ammonium., Bu çalışmada, sera koşullarında değişik azot kaynakları içeren besin çözeltileri ile yetiştirilen domates bitkisine yapraktan seyreltik asit (% 0.1'lik H2SO4) uygulamasının bitkinin toplam demir, aktif demir, klorofil ve toplam N içeriği ile kuru madde üzerine etkisini görmek ve olası demir noksanlığında ilave demirli gübrelemeye gerek kalmadan H2SO4 uygulamasıyla bu noksanlığı giderebilmek amaçlanmıştır. Seyreltik asit domates bitkisine bir hafta ara ile iki kez yapraktan uygulanmıştır. Bitkide kuru madde en fazla amonyum ile, total N içeriği ise en fazla üre ile yetiştirilen bitkilerden elde edilmiş olup, yapraktan asit uygulaması ile bitkilerin hem kuru madde, hem de toplam N içerikleri önemli düzeyde artış göstermiştir. Yapraktan asit uygulaması üre ve nitrat ile yetiştirilen bitkilerde toplam ve aktif demir içeriklerinde artış göstermesine rağmen bu artış istatistiki olarak önemli bulunmamıştır. Amonyum ile yetiştirilen bitkilerde ise asit uygulaması toplam demir içeriği üzerine negatif etki yapmıştır. Üre ile yetiştirilen bitkilerde asit uygulaması ile klorofil içeriği etkilenmezken, nitrat ve amonyum ile yetiştirilen bitkilerde önemli düzeyde artış göstermiştir.

This study aimed to investigate the effect of Zinc (Zn) and Nitrogen (N) fertilizations on grain zinc (Zn) phosphorus (P) and phytic acid (PA) concentrations, PA/Zn molar ratio, yield, phytase activity and protein content of lentil varieties. Zinc fertilization led to decrease in grain P concentrations and related parameters. Phytic acid/Zn molar ratios decreased with the increment of Zn and protein concentrations in grains, but increased with the increase of grain P levels. While there were positive relations amongst the grain P concentrations and P-related parameters, there was a close negative relation with Zn generally. Although, protein concentrations negatively affected by grain P and PA concentrations, there was a significant positive relation with N fertilization. Increase of both Zn and P concentrations in grains negatively affected phytase activity, but a positive correlation was seen between the protein and phytase. Grain yield increased with both Zn and N fertilization.

A study was conducted to investigate the effect of different irrigation programs and nitrogen (N) levels on N concentration, uptake and utilisation by the processing tomato (Lycopersicum esculentum). The amount of water used was determined based on a screened class-A pan. Irrigation treatments consisted of 2 different irrigation intervals (I5, 5 days; I10, 10 days) and 3 plant-pan coefficients (Kcp0.50, 0.50; Kcp0.75, 0.75; Kcp1.00, 1.00). Nitrogen treatments consisted of 3 N levels (N0, 0 kg/ha; N80, 80 kg/ha; N160, 160 kg/ha). The irrigation interval, plant-pan coefficient and N fertiliser rate affected all parameters examined; however, the N fertiliser rate had the greatest impact. Nitrogen applications increased N concentrations in the leaf, tomato and vegetative biomass. Plant total N uptake and benefit rate from fertiliser was highest with the N160, I10 and Kcp0.75 and Kcp1.00 treatments. Results show that the N160, I10 and Kcp0.75 treatments can be used for increasing plant N uptake and the benefit rate from fertiliser.