Effects of soil conservation practices on soil properties in acontinuous cotton and a continuous soybean system in westtennessee
Başlık çevirisi mevcut değil.
- Tez No: 706508
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Yüksek Lisans
- Konular: Ziraat, Agriculture
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2020
- Dil: İngilizce
- Üniversite: The University of Tennessee
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 122
Özet
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Özet (Çeviri)
The integration of conservation agriculture practices can provide benefits to crop production. In recent years, the number of studies focusing on the effect of conservation agriculture practices on sustainable agriculture and the environment have increased. In this study, two different experimental field studies were assessed. In the first study the objective was to determine the impact of different tillage systems, cover crops and nitrogen fertilizer rates on soil total organic carbon (TOC), dissolved organic carbon (DOC), permanganate oxidizable carbon (POXC), total nitrogen (TN) and wet aggregate stability (WAS) in a long-term continuous cotton experiment established in 1981. Cover crops significantly increased all the properties measured. No-till significantly increased WAS and TOC compared to conventional tillage among the soil properties. Overall, notillage and cover crops showed potential in increasing soil parameters measured. In the second study, the use of biochar on a no-till sandy soil in a continuous soybean system was investigated. The objective was to evaluate the effect of different rates of surface applied biochar and sawdust on hydro-physical properties of fluvial deposits. The highest rate of biochar (82 t ha-1 ) significantly increased total organic carbon at two depths (0-5/5-15cm). TOC concentration has increased from 4.1 g/kg to 52.3 g/kg at 0-5 cm and from 1.6 g/kg to 3.5 g/kg at 5-15 cm. The 20.5, 41, and 82 t ha-1 rates of biochar showed higher moisture content compared to the unamended soil, sawdust and lower rates of biochar. No differences in TN at 0 to 5 cm was observed with all treatments except the highest rate of biochar
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