Effects of different levels of Calcium nitrate on some Morpho-physiological and nutritional traits of tomato (Solanum lycopersicum Mill.)

This study was arranged in a completely randomized block design to investigate effects of four levels of calcium nitrate on the nutrition responses and growth characteristics of tomato plants. Treatments includedT0: control; T1: recommendations of calcium nitrate by Yara International (Soil application), 50 kg/ha for 8 weeks since the first week of fruit set and a total of 400 kg/ha; T2: calcium nitrate consumption based on soil test results and the requirements of tomatoes: 40 kg/ha in the first week of fruit set and a total of 320 kg/ha; and T3: the same as the previous treatment plus foliar application of calcium nitrate at 0.5%. Results showed that there were significant differences between tomato fruits regarding uptakes of nitrogen, phosphorus, calcium, magnesium, dry matter, vitamin C, nitrate, potassium, and fruit firmness (P