organic manures and fertilizers

Effects of the continuous use of organic manure and chemicalApr 25, 2017 — Effects of the continuous use of organic manure and chemical fertilizer on soil inorganic phosphorus fractions in calcareous soil. Ke Song Effects of organic manures and fertilizers on organic matterA long-term field demonstration was initiated in 1995 to evaluate the effect of organic manures (FYM, poultry manure and pressmud) and mineral fertilizers on 
Organic Manures and Fertilizers for Vegetable Crops GeneralAnimal manures contribute more to the soil than just nitrogen, phosphorus, and potassium. Continued use of manures builds organic matter in soils and Organic manures and mineral fertilizers | SpringerLinkMineral fertilizers are easy to handle and can be applied with precision with reasonable certainty about their effectiveness. Organic manures are bulky, Discussion on Organic Manures and Fertilizers and thePart of the plant food in farmyard manure is available only over a long period of years and it is difficult to give its exact fertilizer equivalent. From field experiments, Organic fertilizer - WikipediaOrganic fertilizers are fertilizers derived from animal matter, animal excreta (manure), human excreta, and vegetable matter Naturally occurring organic fertilizers