The effect of rainwater harvesting on maize yield in Kisangara, Semi-Arid Tanzania
Başlık çevirisi mevcut değil.
- Tez No: 400575
- Danışmanlar: DR. G. C. L. WYSCURE
- Tez Türü: Yüksek Lisans
- Konular: Ziraat, Çevre Mühendisliği, Agriculture, Environmental Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1995
- Dil: İngilizce
- Üniversite: Unıversıty Of Newcastle Upon Tyne
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
Rainwater harvesting is a technique for increasing the soil moisture content in the soil profile during the drought season. It is suitable for many field crops as well as tree cropping. One of the most important advantages of using this technique is that initial establishment may be improved through the concentration of early showers and crop can be helped to weather a mid-season dry spell, or at critical period the availability of rainfall for crops may be increased. This study aimed to identify the effect of rainwater harvesting on crop yield. It was conducted at Kisangara, semi-arid Tanzania, in two different land slopes, named 3% and 8% and three catchment area to cropped field ratio, CA:CF, (4:1, 2:1 and 0:1). Reference crop evapotranspiration (ETo) and soil moisture deficits were computed by using the Quattro Pro for Windows version 5 , soil moisture contents were measured with neutron probe and calculations were carried out in the top 80 cm of the soil using data from 0-10, 10-30, 30-50 and 50-80 cm, runoff was measured with runoff collecting tanks, and a Class A Pan was used to measure the evaporation from the open water surface. Mean daily soil moisture deficits were found 33.02, 44.53 and 49.76 mm for 8% slope and 27.64, 30.99 and 48.79 mm for 3% slope in 4:1, 2:1 and 0:1 catchment area to cropped field (CA:CF) ratio by using the water balance model. The crop" yields for 8% slope were 4409.2, 3569.7 and 1720 kg/ha in 4:1, 2:1 and 0:1 ratio at Kisangara. The regression analysis were carried out between calculated mean daily soil moisture deficits and average crop yields for 8% slope. According to the results that crop yields were highly affected by the soil moisture deficits (Ra2 = 0.82) . Crop yields increased with a decrease in soil moisture deficits.
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