Download or read book Conservation Tillage Effects on Soil Physical and Chemical Properties in Rice Production in the Arkansas Delta written by Bryan Thomas Schmid and published by . This book was released on 2008 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Tillage Effects on Runoff Water Quality and Soil Physical Properties in the Arkansas Delta written by Travis William Harper and published by . This book was released on 2006 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects Conservation Tillage On Ground Water Quality written by Terry J Logan and published by CRC Press. This book was released on 2018-01-18 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays the environmental sustainability of the cropping systems is increasingly requested by the consumers. Conventional tillage practices, totally turning over the soil between the vineyard rows, may cause erosion due to rain as well as structure destruction of the soil in the long term. Conservation tillage is a soil management technique, poorly widespread in Sardinia, allowing cover cropping between vineyard rows. Furthermore, this technique makes the canopy development control of herbage possible by cutting it up during specific phenological phases. Conservation tillage usually involves direct benefits to farmers such as increasing soil fertility as well as reductionof tillage costs, soil erosion and carbon dioxide (CO2) emissions in the atmosphere. This long term trial, during at least five years aims to assess the conservation tillage impact on chemical-physical soil characteristics in comparison with traditional tillage by evaluating the change of organic matter, C.E.C. and availability of major plant nutrients in the soil and to estimate their probable rise. The field plots are located in a 35% slope condition vineyard, showing massive erosion problem and organic matter low content. A split/plot design with four replications was set up, with the comparison between conservation and traditional tillage apart as main plots. Moreover, the effects of two different irrigation levels were evaluated in the subplots of each main plot. At the beginning of the trial (2011) a pedological survey was made. Three soil profiles were described and sampled along the field slope and soil sampling in each plot were made both to characterize the soil and to find the zero point. The soil chemical and physical characteristics were monitored through a second soil sampling made at the end of 2013. Conservation tillage caused increasing organic matter content and C.E.C. values. As for major plant nutrients in soil, results were more uncertain. Grapevine yield and quality parameters did not show any negative effect when passing from conventional to conservation tillage techniques. The trial provided a preliminary positive evaluation of conservation tillage. However, more years are required to confirm this trend.
Download or read book Long term Effects of Rice Rotation Tillage and Fertility on Near surface Soil Carbon and Nitrogen Cycling written by Jill Marie Motschenbacher and published by . This book was released on 2012 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rice (Oryza sativa L.)-based cropping systems are different from other row crops due to the flood-irrigation scheme used from about one month after planting to a few weeks prior to harvest. The frequent cycling between anaerobic (i.e., flooding during the growing season) and aerobic (i.e., generally, the remainder of the year) conditions can influence the rate of soil organic matter (SOM) decomposition, which can greatly influence carbon (C) and nitrogen (N) storage and sequestration in the soil over time. Therefore, a study was conducted on a silt-loam soil (fine, smectitic, thermic, Typic Albaqualf) at the Rice Research and Extension Center near Stuttgart, which is in the Mississippi River Delta region of eastern Arkansas, to evaluate the long-term effects of rice-based crop rotations [with corn (Zea mays L.), soybean (Glycine max L.), and winter wheat (Triticum aestivum L.)], tillage [conventional-tillage and no-tillage (NT)], soil fertility (optimal and sub-optimal), and soil depth (0- to 10- and 10- to 20-cm) after 12 years (1999-2011) of consistent management on SOM, total and water-stable aggregate (WSA) C, total and WSA N, soil physical properties (WSA structure, bulk density, penetration resistance), soil chemical properties (Mehlich-3 extractable nutrients, pH, and electrical conductivity), and soil surface carbon dioxide (CO2) respiration. Results showed that SOM, total C, and total N concentrations increased over time under the NT treatment and in all rotations that did not include corn in the top 10 cm, but were not affected by the fertility treatment applied. The NT/0- to 5-cm treatment combination had 3 to 6 times greater WSA C and N content than all other tillage-depth combinations in the top 10 cm, which did not differ among one another. Despite rotation trends in total C and N, rotations with increased frequencies of corn generally had greater WSA C and N contents compared to rotations with wheat. However, there were no consistently significant differences in soil surface CO2 flux between tillage treatments and/or among crop rotations after 10- and 11-years of imposed treatment combinations. Results from this long-term experiment suggest that rice rotated with a higher-residue-producing crop, such as corn, may lead to greater C and N sequestration for longer periods of time due to the aggregated form that is predominantly present in the soil. It appears that the management practices of NT and high-residue-producing crop rotations establish a new, greater soil C content equilibrium over time. This long-term research study is important because the results enable a greater understanding of the decadal effects that rice-based crop rotations and conservation management practices have on the physical, chemical, and biological properties of the soil, which in turn, provides insight to the longer-term sustainability of these systems so that they can remain highly productive without detrimental effects to the environment and the soil resource.
Download or read book Department of Agriculture Appropriation Bill written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Agriculture and Related Agencies Appropriations and published by . This book was released on 1962 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations for written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1962 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearings written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1961 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations for 1963 written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1962 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations for 1962 Hearings Before 87 1 on H R 7444 written by United States. Congress. Senate. Appropriations Committee and published by . This book was released on 1961 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations for 1962 written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1961 with total page 1178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations for 1963 Hearings Before 87 2 on H R 12648 written by United States. Congress. Senate. Appropriations Committee and published by . This book was released on 1962 with total page 1602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Conservation Tillage and Conventional Tillage on Selected Physical and Chemical Properties of a Blackland Praire Soil in Texas written by Welhelmus Isak Imanuel Mella and published by . This book was released on 1991 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Budget for 1963 written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1962 with total page 1500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Crop Residue in Conservation Tillage Systems on Soil Quality and Crop Productivity written by Craig Francis Drury and published by . This book was released on 1998 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural Appropriations written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1962 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONSERVATION TILLAGE written by Frank M. D'Itri and published by Springer. This book was released on 1985-10 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tillage Effects on Soil Physical Properties and Process Proceeding written by P. W. Unger and published by . This book was released on 1982 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
