Influence of maize crop-rotations compacting over the changes in the humus
2001
Andonov, D. | Stratieva, S. (Kompleksna Opitna Stantsiya, Yambol (Bulgaria))
Crop-rotation is based on time and place and compacting crop is maize in the main. Fertilizing is optimal anf different for different crops. By crop irrigation a pre-irrigation humidity of 70 to75% of PPV has been kept. The leached resinous soil has a heavy mechanical composition, with a law humus content to 2.21%, neutral to weak alkaline soil reaction-pH in water is 7.1 to 7.5, PPV 32%, volume density 1.22 g/cm3, relative mass 2.7 t/m3. Positive as well as negative soil changes have been found: nitrogen, phosphorus, potassium and humus level in soil layer from 0 to 30 cm increases as result of increase of organic matter by growing of leguminous and other compacting crops by all crop-rotations; a weak humus decrease in soil from 30 to 60 cm by irrigated crop-rotations. By non-compacted and non-irrigated crop-rotations the changes of tested indicies in both soil layers from 0 to 30 cm and from 30 to 60 cm are positive.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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