نتایج جستجو برای: the cost of field cement mulching estimated 30 lower than oil mulching
تعداد نتایج: 22955379 فیلتر نتایج به سال:
a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...
today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...
Background: Traditional polyethylene film mulching is widely used in the Loess Plateau region of China to improve crop yields. However, whether long-term can continue ensure yield under future climate change conditions questionable. First, we conducted a four-year field experiment calibrate and validate biogeochemical DeNitrification–DeComposition (DNDC) model. Then, based on calibrated validat...
Soil erosion is one of the major problems in agricultural areas world, and straw mulching a conservation practice that may reduce soil runoff. How much necessary to runoff? The objectives this study were quantify characterize runoff under different levels oat mulching, as well analyze cost erosion. An experiment was performed site with recently tilled for peach orchard implementation. In ridges...
Soil erosion is a growing challenge for agricultural production in Northern China. To explore the effect of variation in stubble height and mulching biomass on soil erosion caused by wind, we conducted a field experiment using a quadratic rotation combination design. Results showed that the quantity of straw mulch was the dominant factor affecting soil erosion, and stubble height was of seconda...
implicit and unobserved errors and vulnerabilities issues usually arise in cryptographic protocols and especially in authentication protocols. this may enable an attacker to make serious damages to the desired system, such as having the access to or changing secret documents, interfering in bank transactions, having access to users’ accounts, or may be having the control all over the syste...
Aim of study: We aimed to i) evaluate the effects mulching on Tuber melanosporum mycelium biomass and seedling growth (i.e. root collar diameter height) ii) unravel relationship between in abundance, a T. plantation.Area The experimental plantation is located Pre-Pyrenees mountains Catalonia, Spain.Material methods: was established 2010 using one-year-old inoculated Quercus ilex seedlings. Doub...
according to webster and wind (1972) and anderson et al (1987), “organizational buying is a complex process and involves many people from different functional areas, multiple goals and potentially conflicting decision criteria. moreover, the customers of today are also more knowledgeable and selective when making their purchasing decisions. since a key to organizational survival is the retentio...
In China, the ridge-furrow water conservation planting (RC) system is advantageous for improving crop yields and rainwater use efficiency. In RC planting system, plastic film-mulched ridges are employed for water harvesting while the furrows serve as infiltration and planting belts. To optimize the RC system and to overcome problems due to the lack of water in semi-humid areas at risk of drough...
previous studies regarding teachers’ beliefs have revealed that teachers’ beliefs have influence on their classroom practices. the current study aimed to investigate the effect of teachers’ beliefs about teaching reading strategies on students’ motivation and success in reading comprehension in the context of english teaching as a foreign language in high schools of mazandaran, iran. data were ...
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