Authentic samples of commercially produced organic and conventionally grown tomatoes, lettuces, and carrots were collected and analyzed for their delta15N composition in order to assemble datasets to establish if there are any systematic differences in nitrogen isotope composition due to the method of production. The tomato and lettuce datasets suggest that the different types of fertilizer com...

The main objective of the present study was to compare fertilizer types in their ability to increase the soil organic matter content without increasing potential P leaching losses. Differences in soil organic carbon content, crop yield, P-CaCl2, P-AL, P export by the crop and P leaching from soil supplied with three compost types, cattle slurry, farmyard manure or mineral fertilizers were compa...

With the goal of improving N fertilizer management to maximize soil organic carbon (SOC) storage and minimize N losses in high-intensity cropping system, a 6-years greenhouse vegetable experiment was conducted from 2004 to 2010 in Shouguang, northern China. Treatment tested the effects of organic manure and N fertilizer on SOC, total N (TN) pool and annual apparent N losses. The results demonst...

Water application efficiency, soil organic matter content, water stress inside root zone, EC soil, yield, quality and productivity of potato were investigated under arid poor sandy soils in Egypt during two growing seasons 2018/2019 2019/2020 at the Research Farm National Center (NRC). efficiency average content increased by increasing amount fertilizers applied. The values yield protein carboh...

Tomatoes are a globally cultivated and popular vegetable. The output quality of tomatoes significantly influenced by the use organic fertilizers. It was discovered that fertilizers increase tomato productivity improve fruit quality. influence on yield is shown to be complex dependent soil matter, total nitrogen, kinds, other variables. In this review paper, we evaluated 769 data sets from 107 r...

In the conditions of a long stationary experiment conducted in Saratov region on Southern Chernozem, it was found that for eight rotations six-field grain-pair crop rotation (48 years) variant without fertilization, carbon losses from 0-40 cm layer were highest. Fertilizers N32P16K7 and N38P13K8 per 1 ha area reduced its by 29-32%. When applying N54P17K7, an increase migration organic into unde...

In order to investigate the effect of urea and Azocompost on economic yield, nitrogen use efficiency (NUE) and radiation use efficiency (RUE) of wild majoram, a factorial experiment was conducted based on randomized complete block design with three replications at Yazd and Mashhad, Iran, during 2012-2013 growing season. Four urea levels and four Azocompost levels (to provide 0, 40, 80 and 120 k...

this fertility experiment was carried out using split plots based on a randomized complete block design of three replications in 2006 at sari agricultural sciences and natural resources university. the aim of the experiment was to investigate some macronutrient and micronutrient accumulation in leaves of different soybean cultivars as influenced by some organic fertilizer types and levels. main...

The USDA established the National Organic Program (NOP) to develop national standards for organically produced agricultural products and establish an organic certification program as required by the Organic Foods Production Act (OFPA) passed by Congress in 1990. Organic crop production excludes conventional pesticides, petroleum – based fertilizers, and sewage sludge based fertilizers with some...