一、開闢肥源,增施肥料,是保証農業增產的重要因素。各地所採取的改变耕作制度,增加複种面積,擴大水田和水澆地,多种高產作物等等增產措施,都需要多加肥料,作为物質的保証。而化肥、餅肥等商品肥料的來源有限,虽然工業部門已在積極發展化肥工業,但是在兩三个五年計劃的時期內,並不能滿足農田施肥的需要。因此,積极地廣泛地利用一切自然肥源,解决農業增產的需要,就成为經常的持久的重要任务。二、自然肥源是極为丰富的。人畜糞尿,各地都有,肥效又高。發展牲畜和养猪積 First, to open up fertilizer sources, increase fertilizer, is an important factor in ensuring agricultural production. All the measures taken to change the farming system, increase the area for multiple cropping, expand paddy fields and irrigated land, and increase the yield of various high-yield crops all require more fertilizer as a material guarantee. Fertilizer, cake fertilizer and other sources of fertilizer is limited, although the industrial sector has been actively developing fertilizer industry, but in the period of two or three five-year plan, and can not meet the needs of farmland fertilization. Therefore, the active and extensive use of all natural sources of fertilizers and the solution to the need for increasing agricultural output have become the most important ongoing task of lasting importance. Second, natural fertilizer is extremely rich. Human and animal excrement, all over, fertilizer and high. Develop livestock and pig production