The tomato is an herbaceous perennial plant, but is usually grown as an annual in temperate regions since it is killed by the frost. Tomato plants can be grown in fairly wide range of soil and climatic conditions, and they are also suitable for container growing.
Tomato is one of the world’s most important vegetable crops. (Schoolbag,J et al 2000) Growth characteristics of tomato plants are governed by genetic traits, management practices, nitrogen content of soil and fertilizers, location and season, method of irrigation(sub and drip irrigation), type of fertilizers(organic or inorganic), colonization of soil and minerals. Some minerals are required by the plants for the normal development and growth stages which are met by folia (e. G. Leaf) absorption or by the uptake of solutes from the soil solution.
The three primary microinstructions are nitrogen (N), phosphorus (P), and potassium (K). The three secondary microinstructions are calcium (Ca), sulfur (S), magnesium (MGM) and the microinstructions or trace minerals are boron (B), chlorine (CLC), manganese (Mn), iron (Fee), zinc (Zen), copper (Cue), albumen (Mo) and selenium (Se). The growers of vegetable crops mainly add nutrients to plant roots zones at levels exceeding many times of those required for optimal growth because of the uptake of solutes from the soil solution and soil matrix. Managua A. M. R et al 2007). Groundwater for irrigation used by the growers must consider the amount of nitrogen in the water when deciding how much nitrogen fertilizers they should apply to crop as high amount of nitrogen in the irrigation water can have a preponderant influence on plant growth and development (Macho, R M. A et al 2008). Central to the science of soil management and crop production is the topic of increasing crop yields and growing healthy plants that provide high nutritional value.
When it comes to feeding a hungry world inorganic fertilizers (IF) are unsurpassed in their ability to provide high levels of nutrients to plants in an efficient and economical manner. Understanding their differences helps us all to understand their appropriate uses. Organic fertilizers (OF) are the result of the natural decomposition of plant and animal waste. Most common organic fertilizers contain animal manures, imposts, sewage sludge and by-products trot processed animal and vegetable materials. Inorganic fertilizers are mined or manufactured.
The primary difference between organic and inorganic fertilizers is the nutrient content. Organic fertilizers contain small concentrations of plant nutrients which mean they must be applied at high rates in order to provide the nutrient needs of plants. While it does contain nutrients, manures nutrient levels vary greatly from load to load. Nutrients in manure usually are not readily usable to the plants and are not properly balanced to provide all the nutrient needs the plant requires. Inorganic fertilizers on the other hand can be applied to the exact levels or nutrients required by the plants. The benefits of organic fertilizers are that there is less danger of over fertilization improves soil structure and vastly improves the water holding capacities of sandy soils. But at the same time disadvantages are that nutrients are not immediately available to the plants due to slow release and required to break down in the soil and convert to a fertilizer that plant can use. Also the exact amount of nutrients and exact elements in an organic fertilizers such as manure is not readily available to the home Arden. The benefit of inorganic fertilizers is that the nutrients are easily available to the plants.
Also the exact amounts of a given element can be easily calculated and given to plants. The organic systems of growing crops emphasizes the accumulation of soil organic matter and fertility over time through the use of cover crops, manures and composts and rely on the activity of a diverse soil ecosystem to make nitrogen and other nutrients available to plants. Farmyard manure which is an organic material can be considered as humus supplying and a soil improving agent. Enhancements of Hottentots, chlorophyll density and plant root respiration have resulted in greater plant growth with humid acid application (Managua A.
M. R et al 2007). Comparing the organic fertilizers to the mineral fertilizers, it is said that the organic fertilizers are considered environment friendly than the mineral ones even though there is limited research on the use of organic fertilizers (Kayak S et al 2005). The difference between two types of fertilizers is the release timing of the nutrients which is related to the nutrient solution characteristics and also to the substrate itself Ionian et al 2004). The organic matter content with substrate promotes microbial biomass and activity.
The yield response of tomato to the added nitrogen through inorganic fertilizers is evident to a considerable level. However, the nitrates produced in the soil from the added N fertilizers can react with the organic matter of the soil and deplete even the native humus and may result in the fall of the crop production. This problem can be overcome by the application of additional amount of organic residues. (Douglas J. Centralizes. Com) In relation to the above, the aim of this study was to investigate the response of moat plants to two different organic and inorganic fertilizers as compared to tomato plants without any added fertilizers.