Role of Chelated Iron Fe-EDTA and Nitrogen in improving the Quality of Soybean seeds Glycine max L. At two levels of soil acidity
Keywords:Chelate Iron Fe-EDTA, Nitrogen, Acid soils, Highly acidic soils, Soybeans
An experiment was carried out inside the greenhouse of the Agricultural Technology Research Station, University of Perlis Malaysia in Padang Besar, Perlis, Malaysia. In 2015. The aim of the study was to diagnose a role of chelate iron Fe-EGTA 13% and Nitrogen to improving the quality of Soybean seeds (oil and protein content), Cultivated in acidic soil compared to highly acidic soil. The study included four levels of chelate iron Fe-EDTA (0, 0,3, 0,6, 0,9 kg iron Fe-EDTA/ha) and three levels of nitrogen (0, 60, 120 kg N/ha) applied to soil. Acidic and highly acidic soils, and in three repetitions. Data were collected for the studied characteristics, were statistically analyzed, and the means were compared using the least significant difference L.S.D at a probability level of 0.05. The results showed that the addition of chelate iron Fe-EDTA at a level 0.9 kg Fe/ha was a significant increase in the percentage of oil and protein in the seeds compared to the rest of the levels 20.88 and 34.10 % respectively, at the acidic soil and also ta highly acidic soil 20.45 and 34.27 % respectively, as well as, at the acidic soil the level of addition of nitrogen 120 kg N/ha significantly superior to the rest of the levels in increasing the percentages of oil and protein 20.18 and 33.20 % respectively, also ta highly acidic soil 20.08 and 31.72% respectively. The interaction between the study factors led to significant increase for the percentages of oil and protein, were where gives the interaction between the level of chelate iron 0.6 kg Fe/ha with the level of nitrogen 120 kg N/ha highest mean for oil content in the seeds at acid soils 21.47% , while the interaction between 0.9 kg Fe/ha with the level of nitrogen 120 kg N/ha in highest oil content in the seeds at the highly acidic soils 20.47 %. as well as in mean of protein content in both types of soils 35.78 and 34.30 %respectively.