搜索结果: 1-4 共查到“畜牧学 Constraints”相关记录4条 . 查询时间(0.062 秒)
Agricultural subsidy with capacity constraints and demand elasticity
allowance constrained farmland inputs inhibiting effect stimulating effect
2015/2/6
Agricultural subsidy has attracted more and more attention. This paper captures the effects of subsidy (including area subsidy and price subsidy) on the total sown areas of crops based on the assumpti...
Nutritional Constraints and Possibilities for Pig Production on Smallholders Farms in Central Vietnam
Household Pig Feedstuffs Nutritive Value Village
2016/5/4
This study aimed to evaluate the nutritional situation of pigs kept in three ecological zones of central Vietnam: Upland, Lowland and Coastal Area. An interview-based questionnaire was made and survey...
Nguni cattle marketing constraints and opportunities in the communal areas of South Africa：Review
Auction beef diseases transactional costs sustainability
2009/3/4
Cattle production is the most important livestock sub-sector in South Africa. It contributes about 25 - 30% to the total agricultural output per annum. However, cattle productivity is declining due to...
A Research Review of Village Chicken Production Constraints and Opportunities in Zimbabwe
Constraints Gender Marketing Mortality Village Chicken
2016/4/28
Development of village chicken production can be a sustainable way of helping to meet the welfare needs of rural populations and raise their living standards. There is a dearth of information on resea...