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Rice spikelets become sterile when exposed to high temperatures during flowering. Recent experimental studies have shown that transpirational cooling and flowering time (within the day) are important factors determining sterility. Extrapolation of the results from these experimental studies to ot...


Oort, Pepijn A.J. vanSaito, KazukiZwart, Sander J.Shrestha, S.[A simple model for simulating heat induced sterility in rice as a function of flowering time and transpirational cooling]A simple model for simulating heat induced sterility in rice as a function of flowering time and transpirational cooling

A study conducted at Beke station, Borana (Ethiopia), to assess the potential producitivity of indigenous sheep and goats under traditional Gabbra management conditions. Summarises monthly parturition and distribution of birth, birth weight, live weight, daily weight gain from birth to weaning, f...


Dessalegne, B.[Small stock production in the southern rangelands of Ethiopia]Small stock production in the southern rangelands of Ethiopia
Autor: Ward, H.K.

Reviews research related to the productivity of indigenous breeds of cattle in Zimbabwe. Discussions and data on comparative production studies and research related to components of production, particularly fertility, calving, lactation, weaning, calf growth, carcass characteristics, nutrition, t...


Ward, H.K.[Indigenous cattle research - A review]Indigenous cattle research - A review

The reproductive performance of sheep and goats on backyard farms was studied in selected areas of southern Ghana. Out of 80 farms surveyed, 16 (20 percent) kept only goats while 38 (47.5 percent) kept only sheep; 26 (32.5 percent) had both species. Around 93 percent of the backyard farmers had 2...


Awotwi, E.K.Fynn, K.E.[Reproductive performance of sheep and goats on backyard farms in southern Ghana]Reproductive performance of sheep and goats on backyard farms in southern Ghana

This work was conducted to assist the large cattle multiplication centres to produce more animals of the genotype being demanded to improve peasant farm income, to generate an alternative way of introducing the same genotype to farmers with limited income by using artificial insemination, to assi...


Mukasa-Mugerwa, E.[Technological improvement of Zebu cattle breeding efficiency]Technological improvement of Zebu cattle breeding efficiency

This study examined estrus response, estrus response interval and pregnancy rate of Bos indicus and B. indicus x B. taurus crossbred cows and heifers after oestrus synchronization. A total of 101 non-pregnant and cycling animals, composed of 63 Boran (46 heifers and 17 cows) and 38 Boran-Simmenta...


Sisay, A.Ebro, A.Tegegne, Azage[Fertility of Bos indicus and B. indicus x B. taurus crossbred cows and heifers after oestrus synchronization in the Rift Valley of Ethiopia]Fertility of Bos indicus and B. indicus x B. taurus crossbred cows and heifers after oestrus synchronization in the Rift Valley of Ethiopia
Autor: Makinnon, D.

Productivity of sheep and goats were in Mozambique were investigated. Discussions and data on number of parturitions and litter size, age at first parturition, interval between pregnancies, mortality, weight at different ages, in native breeds of sheep and goats included.


Makinnon, D.[Productive capacity of small ruminants - preliminary results]Productive capacity of small ruminants - preliminary results
Autor: El-Amin, F.M.

This study reports on a 2 year observation on some reproductive traits of Desert sheep at Khartoum, Sudan. Data on duration of oestrous and pregnancy, seasonality of lambing, ewe fertility and reproductive rate, birth weight, prenatal and preweaning mortality rate, and sex ratio included.


El-Amin, F.M.[Performance recording of sheep in the Sudan. 1. Reproductive traits]Performance recording of sheep in the Sudan. 1. Reproductive traits

Various fertility parameters are under investigation in the Small East African goat at Isiolo, northern Kenya. A programme of aseasonal breeding is used and parameters are examined in relation to the quantity and quality of forage available. Breeding groups consisting of 18 females each are used:...


Rutagwenda, T.Schwartz, H.J.Carles, A.B.Said, A.N.[Effects of seasonal forage supply on some fertility parameters in the Small East African goat in northern Kenya]Effects of seasonal forage supply on some fertility parameters in the Small East African goat in northern Kenya

Presents data on live weight and its variation with the seasons, conception rate, gestation length, calving rate, lactation length and milk yield of Boran cows.Discussions and data on birth weight, live weight change, feed and water consumption of their calves and comparisons of carcass values of...


Obradovic, O.Haile, Aynalem[Studies on the potential of Borana cattle]Studies on the potential of Borana cattle

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