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… crops increases. The aim of this study is to evaluate what impact the use of fertilizers and improved seeds has for farmer’s economic situation and income generation. The study is concerning the production of maize and beans. These two research questions were used to answer the …
en jämförelse mellan tre alternativ
… proposed and compared in this thesis; spreading of the untreated residue as fertilizer (system 1), dewatering to a higher DS content to reduce transportation before spreading as fertilizer (system 2) and production of a solid fuel by dewatering and drying the residue (system 3) …
… to explore opportunities to enhance the phosphorus use efficiencyof inorganic fertilizers in crop production, with techniques available today and in thefuture. Phosphorus is a finite resource of declining quality; therefore a phosphorus use efficiencyin crop production of only …
among small-holder farmers in Kenya
… whom often do not have the economic means to buy inputs, such as chemical fertilizer (Ariga et al., 2008). The overall main objective in this study is to get comprehension for the economic situation for small-holder farmers in Kenya. The specific objectives are to determine what …
… expenditure and in order to decrease environmental impact. Initial phosphorus fertilizer can then be one possibility in order to keep down the fertilizer cost and to decrease environmental impact. This exam study includes a literature study about location of fertilizer and which …
Hur slagkraftig a?r dagens ha?llbarhetscertifiering och kan den föra?ndra mark- och vattenpa?verkan fra?n odlingarna?
… scenarios where the cultivation differed in harvest type and how much fertilizers were added. This was to distiguince potential differences in the budgets of carbon and nitrogen. The largest environmental impacts is due to leakage of nutrients and sedimentation of water streams …
evaluation of methods, microbial activity and agronomic implications
… It contains organic material and plant nutrients which makes ita potential fertilizer for arable cropping. However, it also contains heavy metals and toxic organic compounds and it is therefore in need of evaluation before usage.Microbial tests were performed aiming to evaluate …
Better, more efficient fertilizers with great productivity and economic returns are needed, but it is important today to find fertilizers that are also sustainable. It is also important to carefully monitor their impact on the environment, including potential side-effects. In …
soil carbon and yield modelling for crop rotations with rye
… cultivation scenarios ? Straw left on the field, biogas digestate added as fertilizer. Labelled ”+straw+BD”. ? Straw left on the field, only synthetic fertilizer. Labelled ”+straw-BD”. ? Straw harvested, biogas digestate added as fertilizer. Labelled ”-straw+BD”. ? Straw …
dikningens och gödslingens betydelse vid beskogning på en avslutad torvtäkt i Värmland
… with various drainage intensities (20, 30, and 40 m between ditches), and fertilizer doses 0, 100, and 200 g PK per seedling applied at the date of planting. The aim of this study was to achieve more knowledge about the conditions on afforestation of peat harvesting areas …
… main aimis to study the feasibility of using the produced sewage sludge as a fertilizer in theagriculture of the Aland Islands.The sludge already fulfills limit values for heavy metals in accordance with the Act"The Aland Government´s directive on the use of sewage sludge in …
… value and the soil conditioning organic matter. The subsidy on mineral fertilizers is though an important contributing factor to bad manure usage. The development of biogas production in Russia may seem tempting, looking at the amounts of produced manure. But in reality, this is …
… carbon content should decrease more. Further, the systems with nitrogen fertilizer should result in higher soil carbon. As for pH there was an assumption that ley should be more acidifying than cereals and that non fertilized ley system should be more acidifying than the system …
… high amounts taken-up. Cadmium is reaching the soil both together with the fertilizer, which contains cadmium, but there are also some natural content of cadmium in the soil. This is particularly true in some parts of Sweden. For the cadmium content in the soil, the content of …
… In order to provide for plant available phosphorus, it is applied as mineral fertilizers and farmyard manure. However, that causes phosphorus leaching from arable land to surrounding surface waters and lakes and contributes to the eutrofication. There are three types of soils in …
