ThirdGrasslandfarmingThis systemisakind ofextensivefarmingsystembetweenfallowfarming and permannetfarmingsystem.Thesystemisextensive applied in theblacklandarea of U.S.S.R
11 Third Grassland farming This system is a kind of extensive farming system between fallow farming and permannet farming system. The system is extensive applied in the black land area of U.S.S.R
FourthPemanentfarmingBecause the using ratio of soil is lowand can not adaptto thedevelopmental need of the productionthe farming system was transited topermanent farming.This system hastwo basic forms:one is the rotationfarming ofevery kinds of farmingsystem, the other one is the furtherdevelopment of freefarmingsystemand continuous cropping system.12
12 Fourth Pemanent farming Because the using ratio of soil is low and can not adapt to the developmental need of the production, the farming system was transited to permanent farming. This system has two basic forms: one is the rotation farming of every kinds of farming system, the other one is the further development of free farming system and continuous cropping system
Fifth IntensivefarmingThe intensive farming has some advantagessuch as high input, high output and highbenefit.The system includeplantingintensive and cultivated intensive.Theplanting intensive can raising multiplecroppingmatureprogramandthecultivatedintensive can raising the crop yield of unitareaofsingleseason.Some expertsgotbetter results from the intensive farming13
13 Fifth Intensive farming The intensive farming has some advantages, such as high input, high output and high benefit. The system include planting intensive and cultivated intensive. The planting intensive can raising multiple cropping mature program and the cultivated intensive can raising the crop yield of unit area of single season. Some experts got better results from the intensive farming
Two.The developmental lawoffarmingsystemThere are some correspondinglawwith the improvement of humansociety,the proceeding ofagriculture and the development offarming system are as follows:14
14 Two. The developmental law of farming system There are some corresponding law with the improvement of human society, the proceeding of agriculture and the development of farming system are as follows:
1.the developmental base of farmingsystem is natural condition.Farming systemis akindof stableusingform ofsoil which shapedduring the period of human beingadopting,using,changingthenature and developing agriculture.However,thesystem is conditionedby the nature.15
15 1.the developmental base of farming system is natural condition. Farming system is a kind of stable using form of soil which shaped during the period of human being adopting, using, changing the nature and developing agriculture. However, the system is conditioned by the nature