Nutrient characteristics of aggregates and rhizosphere of a degraded upland soil: Implication for soil fertility evaluation
نویسندگان
چکیده
منابع مشابه
Rhizosphere Microbial Communication in Soil Nutrient Acquisition
Most of the upper layer of the earth’s terrestrial crust is or has been influenced by plant roots, so most soil is actually rhizosphere soil at one time or another. Through their physical, chemical, and biological interactions with the soil, roots play a major role in soil formation (Jenny, 1941) and soil function (Wardle et al., 2004). Microbes factor prominently in global nutrient and energy ...
متن کاملChanges study of soil splash and stability of soil aggregates using polyvinyl acetate
Soil erosion, especially water erosion, threatens the installations, water resources and also human life. The first stage of water erosion is the splash erosion that it requires to control in the primary stages. On the other hand, the application of soil conditioners is one of the approaches that it provide the conservation possibility of soil surface against water erosion, especially erosion f...
متن کاملthe innovation of a statistical model to estimate dependable rainfall (dr) and develop it for determination and classification of drought and wet years of iran
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
15 صفحه اولNitrogen and Soil Fertility
amounts involved are much smaller. The amount of boron in the 7-ton potato crop (if determined) would have been about 0.2 pound. In the case of boron (and to a lesser degree the other micronutrients) if the soil contains excessive amounts, toxic quantities are absorbed by plants and growth is restricted. The need for a reasonable balance in amounts of available nutrients in the soil has been po...
متن کاملIron and Soil Fertility
Fertilizers that are essentially sulfurfree have been used increasingly. Ammonium nitrate, anhydrous ammonia, urea, and ammonia solutions are examples among the nitrogen carriers. The use of concentrated superphosphate and other phosphorus carriers with little sulfur has been expanding. We recommend that farmers in areas of potential deficiency should have a planned program of adding sulfur ins...
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ژورنال
عنوان ژورنال: Annals of Tropical Research
سال: 2009
ISSN: 0116-0710
DOI: 10.32945/atr3115.2009