نتایج جستجو برای: soil seed banks

تعداد نتایج: 280122  

2009
N. K. Fageria V. C. Baligar Y. C. Li

In tropical regions, soil acidity and low soil fertility are the most important yield-limiting factors for sustainable crop production. Using legume cover crops as mulch is an important strategy not only to protect the soil loss from erosion but also to ameliorate soil fertility. Information is limited regarding tolerances of tropical legume cover crops to acid soils. A greenhouse experiment wa...

2015
Anil Kumar

Nonperforming assets (NPA) reflect the risk factor of the concerned commercial bank. Some of these banks operate at a threshold point where further reduction of NPA is not possible without reducing loans and advances, a desirable output. Pursuing an additive slack based efficiency DEA model the potential rate of reduction of NPA is explored for 50 commercial banks operating on Indian soil.

2017
Elana Dayoub Christophe Naudin Guillaume Piva Steven J. Shirtliffe Joëlle Fustec Guénaëlle Corre-Hellou

Legume crops are known to have low soil N uptake early in their life cycle, which can weaken their ability to compete with other species, such as weeds or other crops in intercropping systems. However, there is limited knowledge on the main traits involved in soil N uptake during early growth and for a range of species. The objective of this research was to identify the main traits explaining t...

2011
Pallas

The first granulometrical analysis of soil samples from nesting banks of the Malachite Kingfisher Alcedo cristata is reported. In total 56 samples from the Kinshasa area were analysed. Three standardised particle size fractions were determined in all groups of samples (percentage of sand, clay and silt). Mean particle percentage of soil samples from banks occupied by Malachite Kingfishers avera...

Journal: :جنگل و فرآورده های چوب 0
اعظم نورایی کارشناس ارشد جنگل داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران امید اسماعیل زاده استادیار گروه جنگل داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران سید غلامعلی جلالی دانشیار گروه جنگل داری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران

the aim of this research is to classification of soil seed bank in populus caspica protected area. the study of above ground vegetation and soil seed bank were carried out with braun-blanquet and seedling emergence method respectively. results showed that size of soil seed bank in upper layer (713 seeds per m2) were significantly lower than depth layer (1163 per m2) but species richness from 42...

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