Effects of Soil Conservation Practices on Soil Properties in a Cotton and Soybean System in West Tennessee

Integration of conservation agriculture practices can provide benefits to crop production. The number of studies focusing on conservation agriculture practices’ effects on sustainable agriculture and environment have increased. In this study, two different experimental field were focused on. In the first one, we evaluated different tillage systems, cover crops and nitrogen fertilizer rates impact on soil properties which are soil total organic carbon (TOC), dissolved organic carbon (DOC), permanganate oxidizable carbon (POXC), total nitrogen (TN) and wet aggregate stability (WAS) under continuous cotton production. The results showed that cover crops were statistically significant in increasing all the properties measured. No-till only increased WAS and TOC compared to conventional tillage among the soil properties. Overall conservation practices had potential for enhancing soil properties on a long-term experiment. in the second study, effect of different rate of biochar on hydro-physical properties of fluvial deposits was evaluated. In this study, soil organic carbon (TOC), total nitrogen (TN) infiltration, bulk density, saturated hydraulic conductivity Ksat and moisture content were analyzed. The results indicated that Biochar rate over 82 t/ha has increased total organic carbon at both depths (0-5/5-15cm) while it has decreased bulk density significantly at 0-5 and 5-15 cm. 20.5, 41 and 82 t/ha rates of biochar showed higher moisture content compared to the other treatments. Except the highest rate of biochar, the other treatments showed no effect on total nitrogen at 0-5 cm. these are two studies evaluating conservation practices impacts on soil properties under different main crops. More similar studies are needed to help farmers to make decision of selecting the most proper practice for their production systems

Influence of Tomato and Paprika Paste Residues on Soil Properties and Potato Growth

WOS: 000321935400002In this study seven different applications were performed with the residues of tomato paste factories, green tomatoes, cold processed tomatoes, paprika wastes, ashes of milk processing, and urban wastes in a field experiment on potato growth. The residues were combined with the mineral N, P, K fertilizer as soil amendments. These wastes were applied to the soil and allowed to compost for five months before the Solanum tuberosum cv. Marabel were planted. During vegetation the K and B minerals in the soil decreased whereas, Na increased. The nitrogen, Zn, and B of the leaves were below adequate levels. The iron in the leaves was above adequacy and Cr was under the critical value. The green tomato and paprika wastes had a diminishing effect on leaf Cd. The paprika paste wastes with the addition of minerals N and P increased many elements in the tubers to the highest level by fresh weight. Co and Pb were considerably higher by the dry weight of the tubers than most of the given values. The tuber yield was greatest with "Mineral K +Wastes N, P". Tubers with a diameter >55 mm were affected by the treatments significantly and "Wastes Only" was the most effective treatment. "Waster K+Mineral N, P" had a dominating effect on all of the quality parameters of the tubers

Effects of nitrogen fertilizer on yield quality and nutrient content in broccoli

WOS: 000257084600014This study was conducted to determine the effects of nitrogen (N) doses on yield, quality, and nutrient content in broccoli heads. Treatments consisted of 0, 150, 300, 450, and 600 kg N ha(-1). Nitrogen rates significantly increased yield, average weight of main and secondary heads, and the diameter in broccoli compared to control. The highest total yield (34631 kg ha(-1)) was obtained at 300 kg N ha(-1). At harvest, the highest amount of the total N in broccoli heads was measured at 450 kg N ha(-1) application. Potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), and zinc (Zn) content increased with increases in nitrogen treatments but, phosphorus (P), copper (Cu), manganese (Mn), boron (B), and sodium (Na) contents were not influenced. Also, removed nutrients by broccoli head were highest at 300 kg ha(-1) N rate

Effects of sowing dates and nitrogen application on phosphorus and potassium contents in parsley

WOS: 000246955400109The effects of increased N rates (0, 100, 200 and 300 kg N ha(-1)) on yield, plant length, number of stalk, phosphorus and potassium content in parsley leaf and stalk during seven harvesting at two sowing time were investigated. Nitrogen rates and harvesting times had a significant effect on this criterias. The highest yield, plant length, number of stalk were observed with 100 kg N ha(-1) treatment, but maximum P and K content in leaf, stalk were analyzed with 100 kg N ha(-1) treatment. In second harvest the highest yield and yield criteria values depend on ecological condition. In both sowing time, P, K content in leaf and K content in stalk were determined more higher in I st harvest than anothers significantly (p < 0.01). In this research P content in leaf was observed higher than stalk content. Inspite of this K content in stalk were higher than leaf

EFFECT OF ZINC ON YIELD AND SOME RELATED TRAITS OF ALFALFA

WOS: 000273364900011Effects of increasing dozes of zinc application (0, 40, 80, 120 kg ha(-1)) were studied on herbage, hay, dry matter, crude protein and zinc contents yields of alfalfa (Medicago saliva L.) for three years (2003-2005). The results indicated that different zinc doses had significant effects on these properties. The highest yields were obtained in 80 kg ha(-1) zinc treatment. By this application, increase in yields were determined as 30.9% in herbage, 34.7% in hay and 32.1% in dry matter yield compared to control. The yields differed significantly among the experimental years. In the second year of experiment, average herbage, hay, dry matter and crude protein yields were higher than the first and third years but the highest zinc concentrations of plant were in the first year. Average data of the 3 years revealed that the least yields were obtained from controlComission of Ege UniversityEge University [2005-OMY-01]This research study is partially supported by Comission of Ege University, Contract No. 2005-OMY-01