From external factors should be mentioned, supply of substrate with nitrate, light, day length, temperature,season, supply with water, relative humidity, carbon dioxide concentration in the air, supply with biogenic elements, influence of the accompanying cations,heavy metals, herbicides, chemical properties of the soil, location, time of sowing,time and method of harvest, storage conditions . No studies on nitrite,phosphorus and ammonium content on tomato were founded to compare the results in this study.The principal component analysis shows a positive correlation between tomatoes from conventional agriculture and a negative correlation with tomatoes from organic agriculture. These results show the influence of agricultural inputs on the content of heavy metals, phosphorus and nitrogen isotope compared to those used in organic agriculture . On the other hand, many studies have demonstrated the positive impact of organic farming on soil fertility, through an increase in soil organic matter content and available nutrients.

Organic farming is believed to have a higher mineral potential compared to conventional agriculture .These results are similar to those obtained by Osma and al.  who justified the high content of trace metal elements by the use of fertilizers and the proximity of industries and irrigation water quality. Food insecurity and associated under nutrition affects health, particularly of women, infants, children, and adolescents. Poverty amplifies the risk of under-nutrition and increases health care costs, reduces productivity,led grow lights and slows economic growth, which can perpetuate a cycle of poverty and ill-health .Low-income countries typically have large agricultural sectors and productivity increase in agriculture often serve as the catalyst for growth, as well as having strong effects on reducing poverty due to the high numbers of people involved in these sectors. This shows that there is a pathway for addressing food and nutrition security effectively by leveraging agriculture.Link between agriculture and food security has long been established. Basedon review of evidence on nutrition-sensitive agriculture research conducted since 2014, Ruel et al.  reported that agricultural development programs that promote production diversity, micronutrient-rich crops , dairy, or small animal rearing, can improve the production and consumption of targeted commodities, and that such improvements lead to increase in dietary diversity at the household level.

Significant association between crop diversity and dietary diversity was reported in diets of smallholder farmers and was more closely related to home food consumption than to purchased food consumption.National representative data for the early 2000s from eight developing countries showed that there is a positive association between the number of crops produced and the number of foods consumed by the rural households;ownership of livestock and ruminants are also associated with increase indietary diversity . A study in Nepal showed that production diversity is positively associated with maternal and child dietary diversity, and WHZ . For improvement in an adult woman’s BMI, dietary diversity matters, and equal importance must be given to environmental conditions like better quality of drinking water, good sanitation, smoke-free cooking area and better access to healthcare facilities .Many intervention programmes use the UNICEF framework, which identifies three main determinants of good nutrition: availability and access to food; optimal quality of feeding and caring practices; and a healthy environment and adequate access to health care services.

Johnson-Welch et al.  modified the UNICEF framework calling it the agriculture-nutrition advantage framework,and included agriculture, nutrition and food, with food as the common link between agriculture and nutrition. The framework proposes that agriculture help sensure good nutrition, and good nutrition builds human capital, which is also an input for agricultural production, creating a circular pathway between agriculture and nutrition. However, the evidence is also that increased food production and/or increased income by itself does very little towards ensuring a balanced diet to the rural household Following a review of 25 research studies,Pandey et al.  concluded that the production of targeted nutrition-rich crops,homestead gardens, and diversification of the agricultural production system towards fruits and vegetables and aquaculture can potentially improve nutrient intake and nutritional outcomes.