منابع مشابه
Soil Nitrocxn and Pasture Management
The. seasonal pattern of nitrogen mineralization is described and compared with the potential demand for nitrogen by grasses. Peak mineralization rates occur in spring but are quite inadequate for expression of potential grass growth. Nitrogen fixation by clovers provides a significant input into the system over a short period. Consideration of the fate of fixed nitrogen shows that losses large...
متن کاملDynamical systems modelling of the interactions of animal stocking density and soil fertility in grazed pasture
To examine the long term e ects of fertiliser application on pasture growth under grazing a mathematical representation of the pasture ecosystem is created and analysed mathe matically From this the nutrient application level needed to maintain a given stocking rate can be determined along with its pro tability Feasible stocking levels and fertiliser application rates are investigated and the o...
متن کاملEstimation of Soil Infiltration in Agricultural and Pasture Lands using Artificial Neural Networks and Multiple Regressions
Common methods to determine the soil infiltration need extensive time and are expensive. However, the existence of non-linear behaviors in soil infiltration makes it difficult to be modeled. With regards to the difficulties of direct measurement of soil infiltration, the use of indirect methods toestimate this parameter has received attention in recent years. Despite the existence of various th...
متن کاملINGESTEnD SOIL AND ANIMAL NUTRITION
SOILS are usually considered to influence animal nutrition through the quantity and quality of the herbage they produce, so that the sequence is soil-plant-animal. The fact that soil is ingested by grazing animals indicates that a direct soil-animal effect also needs to be considered. Soil is taken in by animals along with herbage, as soil adhering to leaves, as soil on roots, and as earthworm ...
متن کاملPasture Quality Measurement Tools for Decision Making
Pasture quality is an important component in grazing and livestock management and a key driver of animal performance. Accurate, real-time information on pasture quality can help farm managers in decision making. This study investigated the potential applicability of optical sensors to estimate pasture quality parameters in the field, these have been trialled as part of the P21 Feed Programme, c...
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ژورنال
عنوان ژورنال: Italian Journal of Agronomy
سال: 2013
ISSN: 2039-6805,1125-4718
DOI: 10.4081/ija.2013.e19