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- Nitrogen (2)
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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
The Relationship Between Soil Properties And No-Tillage Agriculture, Robert L. Blevins
The Relationship Between Soil Properties And No-Tillage Agriculture, Robert L. Blevins
Soil Science News and Views
I am highly honored to be invited to present the 3rd annual S.H. Phillips Distinguished Lecture on No-Tillage Agriculture. My interest and subsequent research efforts in the area of no-tillage agriculture began in 1969. Shirley Phillips encouraged my efforts through his interest and enthusiasm for this rather radical and new approach to farming without the use of tillage equipment. At that time, Harry Young, a western Kentucky farmer and pioneer of no-tillage agriculture along with Shirley, Jim Herron, Charlie Slack and other co-workers were excited about the potential of this new, innovative farming system and what it could do for …
A New Concept In Treating Wastewaters ... "Constructed Wetlands", Anastasios D. Karathanasis
A New Concept In Treating Wastewaters ... "Constructed Wetlands", Anastasios D. Karathanasis
Soil Science News and Views
During the last few years a new technology for treating municipal and industrial waste water has emerged, which also shows some potential for treatment of farm and home wastewaters. This technology involves the construction of "artificial wetlands" and establishing a dominant vegetation of Typha (cattails), Sphagnum (moss), certain algae, and other plant species which have the potential to beneficially affect small flows of waste water moving through them by biochemical processes. Interest in these systems has steadily increased because of their low cost (1/10 to 1/2 that of conventional treatment), efficiency, and near nonexistent maintenance. These "constructed wetland" biochemical-treatment systems …
Fall Fertilization And Liming For Tobacco Production, J. L. Sims, Kenneth L. Wells
Fall Fertilization And Liming For Tobacco Production, J. L. Sims, Kenneth L. Wells
Soil Science News and Views
Proper nutrition of tobacco is a prerequisite for achieving high yields of cured leaf possessing desirable marketing characteristics. Together with the variety grown, soils, climate, and curing conditions, a desirable nutrient environment greatly influences yield, quality, and usability of the leaf produced. Late summer and early fall is a good time to select fields for future tobacco crops or to sample this year's tobacco fields which will be used for tobacco next year, and to assess their needs for lime, phosphorus, and potassium. Planning fertilization strategies this fall that lead to increased profit is much more effective than waiting until …
Farm Nutrient Management, William O. Thom
Farm Nutrient Management, William O. Thom
Soil Science News and Views
Nutrient management is becoming a buzz word in today's vocabulary of crop and livestock production. In the past it was applied to efficient management of all nutrient sources used for crop production. More recently it is being used to account for all nutrients used for crop production that are brought onto the farm, removed from the farm in crop and animal products, and reallocated within the farm unit. Nitrogen, phosphorus, and potassium are the nutrients of concern with nitrogen and phosphorus being most important.
Using Solid, Bulk Blended Mix-Grade Fertilizers, Kenneth L. Wells, Jonathan D. Green
Using Solid, Bulk Blended Mix-Grade Fertilizers, Kenneth L. Wells, Jonathan D. Green
Soil Science News and Views
Most solid, mixed fertilizers used in Kentucky are prepared by physically mixing two or more fertilizer materials to a desired analysis. The ingredient materials most commonly used to prepare mixed fertilizers in Kentucky are diammonium phosphate, urea, ammonium nitrate, muriate of potash, and sulfate of potash. During the period January - June, 1990, these 5 materials made up 60% of the 700,000 tons of fertilizer used in Kentucky. And just three of them ... urea, diammonium phosphate and muriate of potash ... made up 47% of the total used during that period.
Managing Soil Content Of Nitrate Nitrogen, Kenneth L. Wells
Managing Soil Content Of Nitrate Nitrogen, Kenneth L. Wells
Soil Science News and Views
The concerns about leaching of fertilizer nitrogen (N} into groundwater which were raised in the late 1960's were largely silenced during the 1970's as our agricultural economy was massively expanded. But since the early 80's they have been raised again to the point that national legislation (the Clean Water Act) was put into place to bring purity of the nation's water supplies into compliance with EPA-established standards. Beyond the apprehension largely about nitrate (NO3) levels in groundwater, the groundwater issue today also includes concerns about pesticides. At the current time, the public is apprehensive about drinking water and …