منابع مشابه
Fertilizing Options for Stockpiling Forages
Objective Many livestock owners use the granular form of urea nitrogen during late summer and fall trying to increase forage growth for “stockpiled” forage. Livestock are then allowed to graze the “stockpile” at a later date when other forages no longer are growing or available. This practice extends the grazing season and reduces the need for higher priced stored feed. Urea is a common nitroge...
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A healthy meal is a complex cocktail of macroand micro-nutrients. Yet, when it comes to discussing diets, we typically consider calories to be the central drivers of hunger and obesity, disregarding other factors. The threat that climate change poses to agricultural productivity and food security around the world, especially in the tropics and sub-tropics, is also usually analysed only in terms...
متن کاملFertilizing Growth: Agricultural Inputs
This paper uses cross-country panel data to estimate the agronomic inputs that lead to cereal yield improvements and the consequences for countries' processes of structural change. The results suggest a clear role for fertilizer, modern seeds and water in boosting yields. It then estimates empirical links in developing economies between increased agricultural yields and economic growth; in part...
متن کاملFertilizing or contaminating?
-Nitroheterocycles have been shown to inhibit the incorporation of 3H-TdR by cultured L-929 cells, and the degree ofinhibition is related to their electronaffinity. On the basis of their chemical reactivity and potential clinical utility, nitrofurazone, misonidazole and metronidazole were selected for more detailed studies of the mechanism of inhibition of DNA synthesis. Double-isotope labellin...
متن کاملDeformation Monitoring of Waste-Rock-Backfilled Mining Gob for Ground Control
Backfill mining is an effective option to mitigate ground subsidence, especially for mining under surface infrastructure, such as buildings, dams, rivers and railways. To evaluate its performance, continual long-term field monitoring of the deformation of backfilled gob is important to satisfy strict public scrutiny. Based on industrial Ethernet, a real-time monitoring system was established to...
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ژورنال
عنوان ژورنال: Science
سال: 1905
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.22.573.838