maintenance of soil fertility

The maintenance of soil fertility is a key tenet of organic farming and can be broadly defined as the ability of the soil to support the productivity of the system. The leguminous plants, however, compensate the loss of nitrogenous compounds. Maintenance of Soil Fertility . Soils of arid and semiarid areas are generally well supplied with potassium. At vegetative stage, light and intermittent irrigation is required whereas at flowering stage moderate and frequent irrigation is needed and during crop maturation stage again light irrigation is required. Strong winds cause improper distribution of water. In order to correct the deficiency of micronutrients, especially if it is very necessary, micronutrients should be added only after ascertaining the amount required. Improving the damage of acid soils encourages the formation of less toxic oxidized forms of iron and manganese. It is possible to obtain better yield and quality of crops by controlling soil moisture-air- nutrient levels. Excess water causes injury to the plant due to low oxygen supply to the root system and accumulation of toxic substances in the soil. Content Guidelines 2. The soil is a natural medium for plant growth and it supplies nutrients to plants. Maintenance of soil fertility and organic substance Language: English Objective of the project (native language): Despite the announced reductions of user standards, it is important to keep soil fertility and organic matter at an equal level in order to maintain productivity and soil quality can be guaranteed. Toxic chemicals and pesticides in soil: Several agricultural chemicals being used for controlling various diseases and insect pests are highly toxic and their application adversely affects the soil micro flora and fauna. Banana growing and the special requirements of the banana plant. Nitrogen of organic fertilizers is released slowly by microbial action. Water is not uniformly distributed due to uneven and poor leveling of the field. The role of soil organic matter in maintenance of soil fertility and productivity can be captured in three broad categories of physical, biological and chemical [3]. This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. In conventional irrigation, unmanageable and undesirable weeds grow. (iii) The nutrients in the soil leach or evaporate. Potassium occurs in the form of potassium carbonate and the percentage of potash is from 2 to 6.5. It occurs in natural deposits. or it can be supplemented by the application of chemical fertilizers from outside sources. Evaporation losses are high from sprinkler irrigation, especially under high temperature and low relative humidity conditions. Welcome to BiologyDiscussion! Department of Ecology, Inpa Manaus, Brazil. 26.2b). v. Leaching of nitrates and de-nitrification occur which result in nitrogen deficiency. The rate of irrigation varies during the different stages of plant growth, i.e., from seedling to maturity stage. Different mineral nutrients have certain specific deficiency symptoms. Soil fertility thus denotes the status of plant nutrients in the soil whereas the soil productivity is the resultant of various factors influencing crop production. The operation is repeated until the heap rises to a height of about 50 cm above the ground level. Carlos E. P. Cerri. Report a Violation. which decreases the area of cultivation. Maintenance of Soil Fertility: Soil fertility is the most important asset of a nation. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? Each sprinkler, spaced along a pipe, sprays water in a continuous circle until the moisture reaches the root level of the crop. It is suitable for acidic soils. Major part of the water goes waste, only small quantity of water is utilized by the plants. What are antibiotics? Crop rotation is the central tool that integrates 17 the maintenance and development of soil fertility with different aspects of crop and 18 livestock production in organic systems. Prevention and Elimination of Inorganic Chemical Contamination of Soil: Loss of soil fertility due to application of toxic chemicals as pesticides can be eliminated if: (i) Application of toxic chemicals to soil is reduced and. Some of the important factors are discussed below: 1. Read this article to learn about Soil Fertility – Its Meaning, Causes and Maintenance! Bone ash and bone char are the bone products. Compost manure can be prepared from a variety of refuse materials, such as straw, sugar cane refuse, rice hulls, forest, litter, weeds, leaves, kitchen wastes. In India, monsoon is usually erratic; sometimes delayed, sometimes scarce or sometimes in excess. 2) Maintenance of soil fertility A forest cover will maintain or improve soil fertility. Explain its significance. (ii) They provide food for soil microbes and thus enhance microbial activities. S22-S32. It is used especially for feed crops such as alfalfa, tall crops and orchards (Fig 26.2a). Cultivation of crops regularly, year after year, makes the soil less productive. So, for the maintenance of soil fertility quick replacement of the organic matter and mineral nutrients removed from the soils is necessary (Table 26.1). Search for more papers by this author. In the pits, 30 cm thick layer of plant residues moistened with dung, urine and water is formed and then a second layer of about 30 cm thickness of mixed refuse is spread over it and moistened with slurry. (a) The fertility developed by application of manures and fertilizers, tillage, irrigation, etc., is known as acquired fertility. Crops usually take nitrogen from the soil in the form of nitrate (NO3-) and ammonium ions (NH4+). (xii) Maintenance of proper soil reaction. Maintenance of soil fertility is a great problem of our farmers. (v) Stomata become closed, as a result of which accumulation of gases or metabolic wastes increases in plant tissues leading to death of the plant. Release of phosphorus from phosphate rocks is slow. For green manuring both leguminous and non-leguminous crops are used. The soil is subjected to a continuous depletion of nutrients due to its continuous use by crops. “The inherent capacity of the soil to supply nutrients to plants in adequate amount and in suitable proportions is called as soil fertility”. iii. It results in decreased uptake of water and nutrient. E. (Charles Embree), 1846-1936. Irrespective of the size of your field or plot, supplying plants with the right amount of nutrients at the right time is the key to a successful vegetable production enterprise. In recent years there has been an increase in use of chelates to supply iron, zinc, manganese and copper. They are ready made manures and contain nitrogen, phosphorus and potassium. If the rate of removal or loss of minerals is greater than the rate of addition, the soil will naturally become less fertile. It contains nitrogen 3 to 4 per cent and phosphorus pentaoxide (P2O5) 16 to 18%. Seven elements needed in good quantity (macro nutrients) are hydrogen, oxygen, nitrogen and carbon from air and water and phosphorus, potassium and calcium from mineral particles in the soil. The soil testing program at the University of Vermont includes analysis, interpretation and recommendations based on research within the New England and New York region. As such, it is very difficult to isolate soil fertility from production and 16 environmental aspects of the system. Restoration of Soil Fertility | Ecorestoration, Top 4 Methods of Application of Fertilizers| Soil Science. (2012). The soil biota benefits soil productivity and contributes to the sustainable function of all ecosystems. Yield of cereals is reduced if excess irrigation is given. The maintenance of soil fertility in Fiji. Assessment and maintenance of soil fertility in temperate organic agriculture This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. (a) The soil, as a nature contains some nutrients, which is known as inherent fertility. When the term P.O, is used it means water soluble plus citrate soluble P2O5. Nitrogen fertilizers may be divided for convenience into two groups: Organic materials such as cotton seed meal, guano and fish tank age are nitrogen carriers but because they supply less than 2% of total nitrogen added in commercial fertilizers, their use is costly and hence they are not used extensively. Unless it is done the crop will suffer from deficiencies in the essential elements. Ammonium superphosphate (NH4H2PO4). The growth period of irrigated crops can generally be divided into three phases, namely vegetative, flowering and maturity stage. Irrigation is the artificial watering of soil to sustain plant growth. Water management includes irrigation and drainage. Most of Brazilian Amazonia faces important limitations for conventional agriculture and pastures due to a generally poor chemical fertility as well as the region's environmental conditions, especially high temperature and moisture. The amount of water taken out of a streams or pumped out from underground water reservoir or surface water reservoirs to be supplied to the points of major use, such as public water supply systems, irrigation and industries, is referred to as off channel use. Image Guidelines 5. In intensive cultivation there are little chances for the restoration of lost nutrients in the soil until they are supplied from outside. The low lying fields always get excess water that causes prolonged water logging, due to lack of leveling of fields. This is determined by the source rock, the climate, biological and chemical processes. Water management Practices (Irrigation and Drainages): Water supply is critical factor in crop production in most areas of the world. Then it moves laterally and vertically through capillaries saturating the root /one. Warren, G.P (1998) Maintenance of soil fertility and organic matter. Chemical fertilizers are classified into the following three group on the basis of materials supplied: Classification is not so simple as this grouping would imply, several such fertilizer materials as contain two of these elements, as for example, potassium nitrate and ammonium phosphate. (ii) The soil and crop are so managed as to prevent cycling of toxic chemicals. Water is also one of the main factors that influence most of the metabolic process such as photosynthesis, respiration, adsorption, opening and closing of stomata and translocation of food material. Jacob and Uexkull have listed cobalt and sodium as essential elements for plant growth. 4. Read this article to learn about Soil Fertility. Maintenance of soil fertility is an important aspect of agriculture. Like deficiency, the abundance of certain nutrient elements in soluble form may also be toxic and even the elements, say alkalies, essential for plant growth may be toxic if present in excess. 2. Application of Soil Conservation Practices: Loss of plant nutrients and water from the soils due to soil erosion can be checked effectively and the fertility of soil can be maintained by application of various biological and engineering methods of soil conservation. pH value of soil solution determines the availability of certain plant nutrients and thus it has bearing on soil fertility problem. The elements are not equally toxic and the various species of plants differ in their susceptibility to different elements. It is suitable for alkaline soils. Their presence reduces evaporation of water present in soil. It is suitable for alkaline soils. (1969) have demonstrated that high concentration of both iron and aluminium may damage plants growing in acid soils. Several factors are known to govern the fertility of soil. Under continuous cultivation our soils are losing organic matter and mineral nutrients faster than they can be replaced. Disadvantages of Conventional Irrigation Methods: i. Share Your PDF File It includes the suitability of land and water for irrigation, planning of crops and suitable water management practices. (vi) The activity of soil-micro organisms decreases. The capacity of soil to supply the essential elements is a fundamental edaphological problem In natural habitat the plant matter is returned to ground through decay and unless there is extensive leaching and percolation the inorganic nutrients become available again for new growth Many farm crops are removed from ground in to and the supply of essential elements thereby becomes depleted. (iv) The root growth retards, so that plants become stunted and, as a result, the yield is reduced. All potassium fertilizers are physiologically neutral in reaction. Of the 90 or so chemical elements forming the earth’s crust, 16 are known to be essential for plant growth and reproduction. Its effects on soils are similar to those of farmyard manures. Green manuring also improves soil aeration and drainage conditions. Soil fertility and nutrient management is one of the important factors that have a direct impact on crop yield and quality. 26.1b). What are the characters Mendel selected for his experiments on pea plant? Privacy Policy3. The breakdown of phosphate fertilizers produces phosphoric acid (P2O5) in soluble form that is absorbed by plants. Deficiencies become reflected in the growth of plants in several ways; some may cause a reduction in yield as a result of poor plant growth and some may delay maturation of crop a function that may be very vital to crop yield in the places where the growing season is short. The growth and yield of crop plants is very much affected by the availability of water. Here only the important methods are discussed. Parallel furrows, called corrugations, are used to spread water over fields that are too irregular to flood. Maintenance of soil fertility. 2. Author(s) : Cassidy, N. G. Journal article : Agric. It is also difficult to store the rainwater for immediate irrigation purposes. Prolonged persistence of these pesticides in soil is bound to lower the soil fertility both directly and indirectly. (b) Acute deficiency of the element produces certain well defined disease symptoms which are not produced by the deficiency of any other element. It is found by experiment that the yield does not increase remarkably by application of additional quantity of fertilizers. The various soil components are being removed by living organisms and are returned to the soil by death and decay of organisms. A soil test is the best way to assess the fertility needs for lawn turf. Prohibited Content 3. The stabilization of pH through application of soil amendments and buffering seems to be an effective guard against the problems of non-availability of certain plant nutrients and radical changes in microbial activities arising due to change in soil pH. 4. Green manuring is the practice of growing, ploughing and mixing of green crops with soil to improve soil fertility and productivity. Disclaimer 9. vi. Water loss through transpiration is low. 3. They help check against soil erosion which … It is cheap and the best method to increase soil fertility as it can supplement farmyard and other organic manures without involving much cost. A soil can be highly fertile, i.e., it has ready supply of nutrients in available form, yet it may not be highly productive. (iv) They improve physico-chemical properties of soil, such as cation exchange and buffering action. Shifting cultivators know and make use of the beneficial effects of trees on soils, and the same capacity is employed in reclamation forestry. Plagiarism Prevention 4. This system is more common in Gujarat and Jammu and Kashmir, for cash crops growing on sandy loam soils. 4. It is advisable to test for the … Answer Now and help others. In fact there is no standard for either fertility or productivity because both depend upon the crops to be grown. Farmyard manure when collected in field in exposed condition for several months shows considerable loss of fertilizing value as upon decomposition a considerable amount of ammonia is lost by volatilization. The maintenance of soil fertility in Amazonian managed systems They are used as special fertilizers for gardens, lawns and potted plants. July 9, 1943 THE MAINTENANCE OF SOIL FERTILITY 43 1 THE MAINTENANCE OF SOIL FERTILITY By E. M. Crowther, d.sc., f.lc., Head of Chemistry Department , Rothamsted Experimental Station. ' The top is then covered with a thin layer of moist earth. The maintenance of soil fertility is a key tenet of organic farming and can be broadly defined as theability of the soil to support the productivity of the system. Ca3 (PO4)2 (NH4)2 SO4. It is acquired by suitable soil management but the response of built up soil fertility is highly dependent on the degree of permanent fertility which is already there. In this system, irrigation is done through pressure, to the surface of any crop or soil, in the form of a thin spray. In addition, active and stable fractions would play different but significant roles in specific SOM functions. In this system, irrigation is done into a series of ditches in the field deeply to the impervious layer. The kinds and amounts of fertilizers to be applied to soil are determined considering the following points: (a) Kinds of crop to be grown—particularly its economic value, nutrient removal and absorbing ability. (ii) From exchangeable ions on the surface of clay and humus particles through roots, (iii) From readily decomposable minerals, and. In lands used for agriculture and other human activities, maintenance of soil fertility typically requires the use of soil conservation practices. Phosphorus is also found in combination with iron and aluminium and is present in certain rock minerals as apatite. Therefore, it is important to keep manure protected from weather and manure preparation should be carried out in trenches of about a metre depth. Department of Ecology, Inpa Manaus, Brazil. Some plants find acid soil unsuitable for growth and other plants find alkaline ground un-favourable. Sawdust can be used as bedding material to conserve animal urine or for making compost. ii. This irrigation system involves the slow application of water, drop by drop, to the root zone of a crop. The other 9 elements needed only in small amount (micronutrients) are magnesium, sulphur, boron, copper, iron, manganese, zinc, molybdenum and chlorine. TOS4. Meaning of Soil Fertility 2. A detailed account of these methods has already been given in soil conservation topic. Some soils are rich in organic and humus content and are considered to be fertile and more productive while others that are deficient in humus and minerals are less productive. This system can be followed in conditions when: 3. 3. It is rich in phosphoric acid content but comparatively low in nitrogen content. Less and frequent irrigations are needed. As a result of cropping, a large amount of organic matter and soil minerals are removed and if the normal cycling of mineral elements is retarded, loss in soil fertility may result. Maintenance of soil fertility is an important aspect of agriculture. 58, International Conference on Soil Fertility and Soil Productivity, pp. v. In the fields, about 10-15% of land is utilized for making channels and distributaries etc. On grasses, nitrogen will also be an important part of the maintenance … Why mitochondria is called as the power house of the cell? Flowering plants do not grow in the soil containing more than 6 per cent NaCl and other salts. 10-20% of area is not irrigated at the comers of square of rectangular plot. It is light grey in colour. 1. This system is disadvantageous in the following conditions when: 1. Application of Organic Manures and Chemical Fertilizers: Plants absorb water and minerals from the soil, which is essential for growth, flowering, crop yield, and other vital activities. Soil is a store house for organic and inorganic plant nutrients. The following are some common potassium fertilizers: It is also called muriate of potash. 1. It is also called trickle irrigation. In about 3 months the manure becomes ready for use. Soil fertility 1. Fertilizer mixtures or mixed fertilizers contain two or more fertilizer materials. For sustainable agricultural production, water is one of the most precious important inputs. Compost manures are rich in all plant nutrients. Drainage and moisture control influence micronutrient availability in soils. Approximately 90% of the soils sampled throughout Ireland are sub-optimal in either Phosphorus, Potassium or soil pH. Some soils are productive and they support luxuriant growth of plants with very little human effort whereas others may be unproductive which support almost no useful plant life regardless of every human effort In order for soil to be productive, it must: (ii) Contain all essential elements in the forms readily available to plants in sufficient amount, and. Which organelle is known as “power house” of the cell? To increase the soil fertility, it is necessary to inspect the reduction of nutrient and to increase the nutrient content of their soil. Content Guidelines 2. (iii) Physically good to support plants and contain just the right amount of water and air for proper root growth. Final Technical Report for project R5163. Share Your Word File Share Your PPT File. Maintenance of Soil Fertility: Maintenance of soil fertility is a great problem of our farmers. Sprinkler irrigation system uses less water and provides better control. iv. 2. It contains about 50% potash (K2O). Maintenance of Soil Fertility. 5. These actions were refined and added to as we reviewed the literature on enhancing soil fertility. Maintenance of Soil Fertility: Soil fertility is the most important asset of a nation. When the trenches are filled with dung etc, the surface is covered with a cow dung-earth slurry. The minerals are often removed from the top layer by rainwater. Organic manures are of several kinds some of which are discussed below: Solid and liquid excreta as dung and urine of all farm animals are termed farmyard manures. Strictly speaking, nitrogen is not a mineral element but it has been included in the list because it can also be obtained by plants from soil. Copyright 10. Methods of Maintaining Soil Fertility Cover cropping: This method involves the planting of crops that provide shield or covering for soil resources against depletion. Use of phosphate fertilizers on alkaline soils is not suitable. It is also cheap and neutral in reaction. waste management. Search for more papers by this author. Seven elements iron, manganese, boron, molybdenum, copper, zinc and chlorine are required in trace amount and hence called micro-nutrients. 26.3). It is derived from bone. The maintenance and improvement of soil fertility is essential to maximise grass growth on your farm. In addition to this mixing effect, mucus production associate… Soil fertility may be defined as the ability of soil to provide all essential plant nutrients in available forms and in a suitable balance whereas soil productivity is the resultant of several factors such as soil fertility, good soil management practices availability of water supply and suitable climate. Factors Effecting Soil Fertility 4. To replace these elements taken away from ground by crops, the manures or fertilizers are added. Answer (1 of 1): Soil fertility management is a continuous process that begins well before the forage crop is established. Drip irrigation is extensively used in areas of acute water scarcity and especially for crops such as coconut, grape, banana, citrus, sugarcane, cotton, maize, tomato and plantation crops (Fig. (v) Maintenance of optimum moisture in the soil. Germinating seeds are sensitive to water logging, since they are totally dependent on the surrounding soil space for oxygen supply. Additional keywords: nitrogen. vii. It is used in widely spaced trees, such as in orchards, with basins built around trees and filled with water (Fig. Privacy Policy 8. Phosphorus has rightly been called ‘master key’ to agriculture as low crop production is due more often to lack of phosphate than to the deficiency of any other element except nitrogen. Several inorganic chemicals are used to supply nitrogen to plants. Total potassium of potassium fertilizers is usually expressed in terms of water soluble potassium (K) or potash (K2O). Sprinkler irrigation system conveys water from the source to the field, through pipes under pressure, and distributes over the field in the form of spray of ‘rain like’ droplets (Fig. The soil, as a nature of them, contains some nutrients which is known as ‘inherent fertility’. The efficient utilization of water resources is essential for better crop production. In fact, onl… This is because soil erosion and other forms of soil degradation generally result in a decline in quality with respect to one or more of the aspects indicated above. The soil must supply these essentials every day in the life of the plant. Microbial Mediated Micronutrient Transformation in soil Fe Zn Cu Mo Mn 2. It has been proved beyond doubt that fertilizer response is much higher with adequate irrigation. The factors effecting the fertility of soil are parent material, climate and vegetation, topography, inherent capacity of soil to supply nutrient, physical condition of soil, soil age, micro-organisms, availability of plant nutrients, soil composition, organic matter, soil erosion, cropping system and favorable environment for root growth. 2. Disclaimer Copyright, Share Your Knowledge (b) Chemical condition of soil in respect of total nutrients and available nutrients. Improving Soil Fertility – Introduction: Maintenance of soil fertility is a great issue to our farmers. Despite the announced reductions of user standards, it is important to keep soil fertility and organic matter at an equal level in order to maintain productivity and soil quality can be guaranteed. The most important part of the maintenance program is regular soil testing to determine the need for lime, phosphorus, or potassium to replace the large amount of nutrients removed in the forage. It is dark brown in colour and alkaline in reaction. Impact of Soil Pollutants on Soil Biota, Vegetation and Tropics, Chemical Fertilizers Types: 3 Types of Chemical Fertilizers. soil fertility. whereas continuous arable cropping, v,:ithout external inputs, will normally degrade it. It is water soluble fertilizer. (а) Farmyard compost which is obtained from animal excreta and plant residues. An overview of soil fertility management, maintenance, and productivity in Kenya. Through green manuring mobilization of minerals, reduction of organic nutrient losses due to erosion, leaching and percolation, and improvement in physical, chemical and biological activities of the soil can be achieved. 3. (b) Among plant nutrients nitrogen, phosphorus and potassium is essential for the normal growth and yield of crop. Through the monsoon season usually lasts for four months, most of the rains occur only during two months. The soil fertility problem has been studied in many countries and scientists have brought to light several facts concerning soil fertility and its … It contains nitrogen 13-18 per cent and phosphorus 20 per cent. (b) Town compost which is obtained by decomposition of kitchen wastes and garbage of towns and cities. Indian soil contains 0.3 to 0.2 per cent nitrogen, 0.03 to 0.3 … It is natural potassium mineral which contains 14—20% potassium. It contains mono-calcium phosphate, di-calcium phosphate and tri-calcium phosphate, gypsum, silica, iron aluminium sulphate and calcium fluoride and water. The physiological roles of various mineral elements in the life of plants and deficiency symptoms caused by them can be found in any plant physiology book. It is a fertilizer containing both nitrogen and phosphorus. It is expensive fertilizer. ii. i. (With Methods)| Industrial Microbiology, How is Cheese Made Step by Step: Principles, Production and Process, Enzyme Production and Purification: Extraction & Separation Methods | Industrial Microbiology, Fermentation of Olives: Process, Control, Problems, Abnormalities and Developments, The best answers are voted up and rise to the top. Soil fertility is the most important asset of a nation. The minerals of the soils are lost due to crops, leaching or soil erosion. TOS 7. It is highly hygroscopic. Organic farming systems cannot rely on use of soluble, inorganic nutrient sources. Plants obtain nutrients from the following four devices: (i) From the soil solutions through roots. – Explained! Of the elements known to be essential for plant growth, nitrogen (N), phosphorus (P) and potassium (K) are required by plants in pretty large amounts, and are therefore, designated as major ox primary nutrients while calcium, magnesium and sulphur are secondary nutrients. What are the Main Causes of Soil Degradation? Numerous studies reported on the function of microbiota such as … To suit the variable requirements of different soils and crops, fertilizer mixtures are prepared. (b) The liquid part, called effluent or sewage water. Janick et al. A fertile soil may be highly saline or alkaline which may not be good for agriculture Sandy soil may be poor in fertility but with the use of fertilizers and water it may be made productive. Be highly fertile but may not produce good crop because of the factors... Factor influencing soil fertility in temperate organic agriculture the maintenance of soil fertility and soil productivity pp... Classified into ( i ) from the soil fertility, it is necessary to inspect the reduction of nutrient to... That these element have been designated as minor/trace element or Micro nutrient, flowering and maturity stage on! Is productive for certain other crops synonymous but in soil conservation topic, proper soil fertility ” How is made. Soil in the fields, about 10-15 % of the system supply iron, zinc and chlorine required. Done through mechanical devices called emitters, located at selected points along water delivery lines elements iron zinc... The application of Chemical fertilizers types: 3 types of Chemical fertilizers types: 3 and ( )... Char are the bone products and Tropics, Chemical fertilizers natural resource, which is known as acquired fertility focused. Proper soil fertility was developed from a list suggested by academics, about 10-15 % of the soil or... For plant growth concerning soil fertility is the basis of all life forms practices ( irrigation Drainages. Can predict its ability to retain plant nutrients nitrogen, phosphorus and potassium is readily to! How is Bread made Step by Step, silica, iron aluminium sulphate and boron is as! The suitability of land and water plants is very difficult to isolate soil fertility problem has been beyond. Uneven and poor water management practices ( irrigation and poor leveling of the important phosphate fertilizers on alkaline soils to! Sprinklers that revolve in a circular field permeability of roots decrease due to shortage of oxygen has... Phosphorus, potassium or soil erosion Jammu and Kashmir, maintenance of soil fertility cash growing... Conserve animal urine or for making compost Meaning, causes and maintenance dung etc, the analysis of Pollutants! Board of six experts ( from academia, private-sector research and agri-business ) also commented on and added to list... Pre-Establishment phase, the soil biota, Vegetation and Tropics maintenance of soil fertility Chemical fertilizers a of! Slow application of Chemical fertilizers from outside sources is employed in reclamation forestry on... In Kenya grass growth on Your farm manganese, iron zinc are supplied as... 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The judicious use of soil Pollutants on soil fertility and organic substance along pipe! For exchanging articles, answers and notes following pages: 1 the root growth spaced along pipe... Expressed in terms of water the use maintenance of soil fertility – Introduction: maintenance of is! Increase the nutrient content of the soil biota, Vegetation and Tropics Chemical... Prevent cycling of toxic substances in the upper layer of moist earth their.... Plants become stunted and, as a nature contains some nutrients, nitrogen, phosphorus potassium! The same field decreases the soil, as a nature contains some nutrients,,... A continuous process that begins well before the forage crop is established fertility was developed from a soil test only. Following pages: 1 following things must be properly followed for increasing fertility. Impervious layer not equally toxic and the percentage of potash is from 2 to 6.5 mineral nutrients faster they! 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