Management strategies/practices for increasing storage of organic C and N in soil in cropping systems in the Northern Great Plains of North America

Non-Peer Reviewe

Erosion Effects on Selected Agronomic Parameters of Hard Red Spring Wheat Across a Landscape

The topic was the usage of 'salvaged' heat from exhaust air in the dairy barn. Rocks would be used to collect and to hold waste heat from the vents. This article discusses a heat exchange method tested in a small barn and used successfully in the large (l20-cow) freestall N DSU dairy barn. The ventilation system uses field rocks to absorb the heat from the exhaust air and return it to the barn in the intake air by reversing the ventilating fan

Distribution of Nitrate-N and Soluble Phosphorus in Displaced Wind Erosion Sediments in the Red River Valley

Erosion of open fields in North Dakota is greatest in winter and spring seasons when crops are not growing. Wind picks up soil from these exposed fields and deposits it over the entire region. Nitrate-N and Bicarbonate Soluble Phosphorus are deposited along banks of streams, fill road and drainage ditches inn little 'dune-like' mounds. These two chemicals can contaminate surface and ground water supplies. The degree to which these contaminants pollute waterways and the environ is directly in proportion to amount of rainfall and wind - erosion events

Phosphorus Placement for Soybean Production in Reduced Tillage Systems

From 1971 to 1991, soybean production in North Dakota increased from 211, 000 acres to 640,000 in 1989 with the greatest increase in the Red River Valley of eastern North Dakota. Typically, soybeans are grown on medium to fine textured soils in a rotation pattern following that of a small grain crop. A shift from moldboard plowing in the Fall season to a chisel method of plowing has gradually taken place to reduce wind erosion. Following Spring season field preparation involves a shallow tillage to add herbicides and to prep the seedbed with a sweep-type tillage tool or tandem disc. Soybeans have shown in the past that they respond better to a broadcast form of phosphorus. Under specific conditions, banded phosphorus appeared more effective. A study with it's results are given. The study was conducted to examine the efficiency of thre phosphorus application methods. Results showed that regardless how the phosphorus fertilizer was applied that it could be applied in reduced tillage farming systems and that it would be available for plant utilization

Taxonomia de solos desenvolvidos sobre depósitos sedimentares da formação Solimões no estado do Acre

Os solos do Estado do Acre na maioria são formados sobre material de origem com grande influência da orogênese Andina, com elevados teores de Ca2+, Mg2+ e Al3+ concomitantemente, associado às combinações diferenciadas dos valores da CTC, V e m. O objetivo deste trabalho foi caracterizar e classificar os solos de uma topossequência sobre material sedimentar da Formação Solimões, no município de Feijó, Acre. Foram abertas trincheiras em três pontos de uma topossequência: terço superior (P1), terço médio (P2) e terço inferior (P3). Os solos foram analisados quanto a morfologia, granulometria (areia, silte e argila), complexo sortivo (Ca2+, Mg2+, Na+, K+ e Al3+), acidez potencial (H+Al), P assimilável, pH (água e KCl), superfície específica, ataque sulfúrico (óxidos de Fe, Al, Ti e Si), mineralogia (frações areia, silte e argila). Os solos foram classificados segundo o Sistema Brasileiro de Classificação de Solos (SiBCS, 2006) e apresentada uma proposta de classificação considerando as peculiaridades do solos da região. Os solos têm baixo grau de desenvolvimento pedogenético, com minerais da fração argila de alta atividade, além da presença de minerais primários, como feldspatos e plagioclásios, nas frações areia e silte. Os solos foram classificados segundo o SiBCS atual como Argissolo Vermelho Álitico plíntico (P1), Argissolo Acinzentado Distrófico plíntico (P2) e Cambissolo Háplico Ta Eutrófico típico (P3)