Potato farming on such slopes is made possible by ridging the crop to encourage tuber development as rain water tends to collect in the furrows then percolates into the soils thereby becoming available to the adjacent potato crop. Farmers are focusing on various farming practices like hilling up of potatoes immediately after sowing with subsequent hand weeding so as to conserve soil and water (Ngigi et al., 2006). More so, others intercrop it with other cover crops as a way of ensuring optimum water use efficiency (Youssef et al., 2007). The term water use efficiency according to Loomis (1983), is defined as the ratio of dry matter produced (Y) per unit of water transpired by a crop (T), expressed as kg/mm or kg/ha/mm. The proposed research will assess effect of selected potato-legume cropping systems on soil moisture conservation and its effect on nutrient uptake and use efficiency.
Therefore, peasants moving towards mechanized farming no longer depend on seasonal rain and also at the same time, are totally dislodged from indigenous farming mechanisms. Due to mechanized farming, crop production increases, yet a complimentary notion develops when people usually care less about reducing the population” (2013, p.17). Boserup (1965, p.54) also added that the cultivators must adapt and keep up with the new methods that are being introduced moreover with regards to the community they must also need to handle the burden of a high investment rate as well as the changes in land
One of the impacts of this growing population is an increase in land usage for settlement purposes. This means farmers will have to feed more people with less land. Economic development will also help increase the demand for food products. The biggest challenge facing farmers is to double their production with limited resources. Economic sustainability is an important aspect of sustainable agriculture.
World population has been increased significantly, while Earth resources are limited and food sources are in danger. In this regard scholars predicted that world’s population would be reached around 10 billion by 2050 and certainly food requirement would be increased more than 70% (Dyson, 2016).These statistical data imply that food sources are increased arithmetically, while population are enhanced geometrically, whereas there should be a balance between population and food supply (Brownell, 2008).To overcome food shortage, some attempts have been done around half century ago which led to green revolution. This paper, aims to have a look on this phenomenon, introduce it and assess pros and cons of it. In this essay, initially, we have a quick look on nature and evolution of green revolution. Secondly, pros and cons of this phenomenon would be discussed and then more holistic solutions for improving this process would be introduced as a real green revolution.
The theory1 says that technological change improves productivity on existing agricultural land and save natural ecosystems. Hence, the intensification of agriculture between 1950 and 2000, due to this improvement, made possible the “Green commodities revolution”. In addition, there was an increasing preoccupation with the problem of feeding a rapidly growing world population. Nevertheless, the concern is not only feed people but to feed them with qualify products. The statistic shows that the global food production must be doubled by 2050 and there is an increasing demand for special products such as meat, dairy, vegetables and fruits.
INTRODUCTION Maize (Zea mays L.) is the second most important cereal crop in the world in terms of total food production. It is grown for fodder as well as for grain. The grains of maize are used in a variety of ways by the human beings. Recently, with the release of improved cultivars and hybrids, the grain yield has been increased but still the maize crop faces many problems. Weeds are one of the most important factors in maize production.
This study was conducted by Iowa State University that focused on corn and soybean rotations compared to oats and alfalfa. The soybean and corn rotations included a mix of chemicals and fertilizers. Where on the two separate plots of oat and alfalfa, they used manure fertilizer. This study showed that the need for herbicides was reduced by 88% and the costs did not change for the oat and alfalfa plots (Bittman). Organic farming is proving to be a threat to pesticides, with the increase popularity of going
Global food security problem Global environmental changes have resulted in many problems like air and water pollution, environmental disasters, global warming and food security is one of these problems. The number and proportion of hungry people in the world are in decline with the recovery in the global economy and the survival food prices, but the hunger rate is still higher than it was before the crisis rising food prices and the economic crisis. Over the time these causes of food security issue are aggravating and growing which makes the need for speed avoided and resolved. This essay will discuss the global food security issue that emerged due to the population explosion, climate changes, agriculture problems, and lack of awareness of
Desertification and land degradation has attracted a lot of global attention in the past few years. The increasing world population indicates that in the coming years there will be a huge increase in the demand for food by 2050. Despite this increase, the land that is available for farming purposes is not increasing. In addition to this, the damage caused by the rigorous use of fertilizers and pesticides that are inorganic, soils that are degraded and reduced biodiversity is forcing more people to seek alternative ways to achieve global food security. Climate change and variability have a very strong negative impact on the arid and semi-arid lands of the world.
This involves using techniques to achieve good crop yields without harming the natural environment or the people who live and work in it. The methods and materials that organic farmers use are summarized as follows: to keep and build good soil structure and fertility and to control pests, diseases and weeds. One of the goals of organic farming is to keep and build good soil structure and fertility. In keeping and building good soil structure and fertility, farmers must use recycled and composted crop wastes and animal manures. Nutrients from crop wastes and animal manures are beneficial to the growth and yield of a crop, fruits, vegetables, in general, it is beneficial to the plants.